Seagate Brush Cutter ST3146707LW LC User Guide

Users Guide

Cheetah 10K.7 SCSI

ST3300007LW/LC

ST3146707LW/LC

ST373207LW/LC

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Users Guide

Cheetah 10K.7 SCSI

ST3300007LW/LC

ST3146707LW/LC

ST373207LW/LC

Download from Www.Somanuals.com. All Manuals Search And Download.

Publication number: 100260915, Rev. D

July 2005

Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC.

Cheetah, SeaTools, SeaFONE, SeaBOARD, SeaTDD, and the Wave logo are either regis-

tered trademarks or trademarks of Seagate Technology LLC. Other product names are regis-

tered trademarks or trademarks of their owners.

Seagate reserves the right to change, without notice, product offerings or specifications. No

part of this publication may be reproduced in any form without written permission of Seagate

Technology LLC.

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Revision status summary sheet

Revision

Date

Sheets Affected

Rev. A

Rev. B

Rev. C

Rev. D

03/17/04

09/22/04

05/05/05

07/21/05

1/1, v-viii, 1-83.

Pages 9, 12, 1, 18, 25, 26, 28-34, 37, 43, 44, 58, and 87-90

Pages 11, 17, 27, 56, 60, 61, and 62.

Pages 4 and 12.

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Contents

1.0

2.0

Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Applicable standards and reference documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1

Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1.1

2.1.2

Electromagnetic compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.2

2.3

Electromagnetic compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.0

General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1

3.2

3.3

3.4

3.5

Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Media characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Formatted capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5.1

Programmable drive capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.6

3.7

3.8

Factory installed accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Options (factory installed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Accessories (user installed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.0

Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1

4.2

Internal drive characteristics (transparent to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SCSI performance characteristics (visible to user) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2.1

4.2.2

4.2.3

Access time [4]. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Format command execution time (minutes) [1] . . . . . . . . . . . . . . . . . . . . . . . . . 12

Generalized performance characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.3

4.4

4.5

Start/stop time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Prefetch/multi-segmented cache control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5.1

4.5.2

4.5.3

Caching write data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Prefetch operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Optimizing cache performance for desktop and server applications . . . . . . . . . 15

5.0

Reliability specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1

Error rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1.1

5.1.2

5.1.3

Recoverable Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Unrecoverable Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Seek errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2

Reliability and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.1

5.2.2

5.2.3

5.2.4

5.2.5

5.2.6

5.2.7

Annualized Failure Rate (AFR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Preventive maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Hot plugging Cheetah 10K.7 SCSI disc drives. . . . . . . . . . . . . . . . . . . . . . . . . . 18

S.M.A.R.T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Thermal monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Drive Self Test (DST). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Product warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6.0

Physical/electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1

6.2

AC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

DC power requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2.1

6.2.2

6.2.3

Conducted noise immunity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Power sequencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

12 V - Current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.3

6.4

Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Environmental limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

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6.4.1

6.4.2

6.4.3

6.4.4

6.4.5

6.4.6

6.4.7

6.4.8

Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Corrosive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.5

Mechanical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.0

8.0

Defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

7.1

7.2

7.3

7.4

Drive internal defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Drive error recovery procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

SCSI systems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Background Media Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

7.4.1

Media Pre-Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.1

Drive ID/option select header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

8.1.1

8.1.2

Notes for Figures 18, 19, and 20.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

8.2

8.3

8.4

8.5

Drive orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Drive mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

9.0

Interface requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.1

9.2

9.3

General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SCSI interface messages supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

SCSI interface commands supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

9.3.1

9.3.2

Inquiry Vital Product data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Mode Sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

9.4

9.5

SCSI bus conditions and miscellaneous features supported. . . . . . . . . . . . . . . . . . . . . . . 63

Synchronous data transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.5.1

9.5.2

Synchronous data transfer periods supported . . . . . . . . . . . . . . . . . . . . . . . . . . 64

REQ/ACK offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.6

9.7

Physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

9.6.1

9.6.2

9.6.3

9.6.4

DC cable and connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

SCSI interface physical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

SCSI interface cable requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Mating connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Electrical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

9.7.1 Multimode—SE and LVD alternatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

9.8

9.9

9.10

9.11

Terminator requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Terminator power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Disc drive SCSI timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Drive activity LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

10.0

Seagate Technology support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

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List of Figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Cheetah 10K.7 SCSI family drive (ST3300007LC shown) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Typical ST3300007 drive +12 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Typical ST3300007 drive +5 V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Typical ST3146707 drive +12 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Typical ST3146707 drive +5 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Typical ST373207 drive +12 V current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Typical ST373207 drive +5 V current profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

ST3300007 DC current and power vs. input/output operations per second (SE) . . . . . . . . . 31

ST3300007 DC current and power vs. input/output operations per second (LVD). . . . . . . . . 31

Figure 10. ST3146707 DC current and power vs. input/output operations per second (SE) . . . . . . . . . 32

Figure 11. ST3146707 DC current and power vs. input/output operations per second (LVD). . . . . . . . . 32

Figure 12. ST373207 DC current and power vs. input/output operations per second (SE) . . . . . . . . . . 33

Figure 13. ST373207 DC current and power vs. input/output operations per second (LVD). . . . . . . . . . 33

Figure 14. Location of the HDA temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 15. Recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 16. LW mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 17. LC mounting configuration dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 18. J6 jumper header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 19. J5 jumper header (on LW models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 20. J2 option select header (on LW models only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 21. Air flow (suggested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 22. LW model drive physical interface (68-pin J1 SCSI I/O connector) . . . . . . . . . . . . . . . . . . . . 66

Figure 23. LC model drive physical interface (80-pin J1 SCSI I/O connector). . . . . . . . . . . . . . . . . . . . . 66

Figure 24. SCSI daisy chain interface cabling for LW drives. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 25. Nonshielded 68-pin SCSI device connector used on LW drives . . . . . . . . . . . . . . . . . . . . . . 72

Figure 26. Nonshielded 80-pin SCSI “SCA-2” connector, used on LC drives . . . . . . . . . . . . . . . . . . . . . 73

Figure 27. Typical SE-LVD alternative transmitter receiver circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

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viii

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1.0

Scope

This manual describes Seagate^®Technology LLC, Cheetah^®10K.7 SCSI disc drives.

Cheetah 10K.7 SCSI drives support the small computer system interface (SCSI) as described in the ANSI

SCSI SPI-3 interface specifications to the extent described in this manual. The SCSI Interface Product Manual

(part number 75789509) describes general SCSI interface characteristics of this and other families of Seagate

drives.

From this point on in this product manual the reference to Cheetah 10K.7 SCSI models is referred to as “the

drive” unless references to individual models are necessary.

Figure 1.

Cheetah 10K.7 SCSI family drive (ST3300007LC shown)

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2.0

Applicable standards and reference documentation

The drive has been developed as a system peripheral to the highest standards of design and construction. The

drive depends upon its host equipment to provide adequate power and environment in order to achieve opti-

mum performance and compliance with applicable industry and governmental regulations. Special attention

must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu-

lation. In particular, the drive must be securely mounted in order to guarantee the specified performance char-

acteristics. Mounting by bottom holes must meet the requirements of Section 8.4.

2.1

Standards

The Cheetah 10K.7 SCSI family complies with Seagate standards as noted in the appropriate sections of this

Manual and the Seagate SCSI Interface Product Manual, part number 75789509.

The Cheetah 10K.7 SCSI disc drive is a UL recognized component per UL1950, CSA certified to CSA C22.2

No. 950-95, and VDE certified to VDE 0805 and EN60950.

2.1.1

Electromagnetic compatibility

The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to

use. As such the drive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC

Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communica-

tions.

The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides

reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules and Regula-

tions of the Canadian Department of Communications when properly packaged. However, it is the user’s

responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O

cables may be required if the enclosure does not provide adequate shielding. If the I/O cables are external to

the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con-

troller.

2.1.2

Electromagnetic susceptibility

As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is

the responsibility of those integrating the drive within their systems to perform those tests required and design

their system to ensure that equipment operating in the same system as the drive or external to the system

does not adversely affect the performance of the drive. See Table 2, DC power requirements.

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2.2

Electromagnetic compliance

Seagate uses an independent laboratory to confirm compliance to the directives/standard(s) for CE Marking

and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys-

tem represents the most popular characteristics for test platforms. The system configurations include:

• Typical current use microprocessor

• 3.5-inch floppy disc drive

• Keyboard

• Monitor/display

• Printer

• External modem

• Mouse

Although the test system with this Seagate model complies to the directives/standard(s), we cannot guarantee

that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance

and provide CE Marking and C-Tick Marking for their product.

Electromagnetic compliance for the European Union

If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic

Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and

Directive 93/68/EEC of 22 July 1993.

Australian C-Tick

If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995

and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man-

agement Agency (SMA).

Korean MIC

If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with paragraph

1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the Electromagnetic

Compatibility Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information and

Communication Republic of Korea.

Taiwanese BSMI

If this model has the Chinese National Standard (CNS) 13438 marking, it complies with Chinese National Stan-

dard (CNS) 13438 and meets the Electromagnetic Compatibility (EMC) Framework requirements of the Tai-

wanese Bureau of Standards, Metrology, and Inspection (BSMI).

2.3

European Union Restriction of Hazardous Substances (RoHS)

A new law, the European Union Restriction of Hazardous Substances (RoHS) directive, will restrict the pres-

ence of chemical substances, including Lead (Pb), in electronic products effective July 2006. The directive’s

requirements have not been finalized. This drive is manufactured with components and materials that are

expected to comply with the RoHS directive when the directive takes effect.

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2.4

Reference documents

Cheetah 10K.7 SCSI Installation Guide

Safety and Regulatory Agency Specifications

SCSI Interface Product Manual

Seagate P/N 100260917

Seagate P/N 75789512

Seagate P/N 75789509

Applicable ANSI small computer system interface (SCSI) document numbers:

T10/1143D

T10/1416D

T10/1417D

T10/1157D

T10/1302D

T10/1365D

Enhanced SCSI Parallel Interface (EPI)

Primary Commands-2 (SPC-3)

SCSI Block Commands (SBC-2)

SCSI Architectural Model-2 (SAM-2)

SPI-3 (SCSI Parallel Interface version 3)

SPI-4 (SCSI Parallel Interface version 4)

SFF-8451

Specification for SCA-2 Unshielded Connections

Seagate P/N 30190-001 (under 100 lb.)

Seagate P/N 30191-001 (over 100 lb.)

Package Test Specification

Specification, Acoustic Test Requirements, and Procedures Seagate P/N 30553-001

In case of conflict between this document and any referenced document, this document takes precedence.

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3.0

General description

Cheetah 10K.7 SCSI drives combine giant magnetoresistive (GMR) heads, partial response/maximum likeli-

hood (PRML) read channel electronics, embedded servo technology, and a wide Ultra320 SCSI interface to

provide high performance, high ] data storage for a variety of systems including engineering workstations, net-

work servers, mainframes, and supercomputers.

Ultra320 SCSI uses negotiated transfer rates. These transfer rates will occur only if your host adapter supports

these data transfer rates and is compatible with the required hardware requirements of the I/O circuit type. This

drive also operates at SCSI-1 and SCSI-2 data transfer rates for backward compatibility with non-Ultra/Ultra2/

Ultra320 SCSI host adapters.

Table 1 lists the features that differentiate the Cheetah 10K.7 SCSI models.

Table 1:

Drive model number vs. differentiating features

Number of active

Number of I/O

connector pins

Model number

heads

I/O circuit type [1]

ST3300007LW

ST3146707LW

ST373207LW

Single-ended (SE) and low voltage differential (LVD)

ST3300007LC

ST3146707LC

ST373207LC

Single-ended (SE) and low voltage differential (LVD)

[1] See Section 9.6 for details and definitions.

The drive records and recovers data on approximately 84 mm non-removable discs.

The drive supports the Small Computer System Interface (SCSI) as described in the ANSI SCSI interface

specifications to the extent described in this manual (volume 1), which defines the product performance char-

acteristics of the Cheetah 10K.7 SCSI family of drives, and the SCSI Interface Product Manual (volume 2), part

number 75789509, which describes the general interface characteristics of this and other families of Seagate

SCSI drives.

The drive’s interface supports multiple initiators, disconnect/reconnect, self-configuring host software, and log-

ical block addressing.

The head and disc assembly (HDA) is sealed at the factory. Air circulates within the HDA through a non-

replaceable filter to maintain a contamination-free HDA environment.

Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actu-

ator, etc.) as this requires special facilities. The drive contains no replaceable parts. Opening the HDA voids

your warranty.

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Cheetah 10K.7 SCSI drives use a dedicated landing zone at the innermost radius of the media to eliminate the

possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the

landing zone when power is removed.

An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur-

ing shipping and handling. The shipping lock automatically disengages when power is applied to the drive and

the head load process begins.

A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides

excellent performance with minimal power dissipation.

3.1

Standard features

The Cheetah 10K.7 SCSI family has the following standard features:

• Integrated Ultra320 SCSI controller

• Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)

• 16 bit I/O data bus

• Asynchronous and synchronous data transfer protocol

• Firmware downloadable via SCSI interface

• User-selectable logical block size (512 to bytes per logical block) in any multiple of four bytes

• Programmable sector reallocation scheme

• Flawed sector reallocation at format time

• Programmable auto write and read reallocation

• Reallocation of defects on command (post format)

• ECC maximum burst correction length of (320) bits

• Sealed head and disc assembly

• No preventative maintenance or adjustment required

• Dedicated head landing zone

• Embedded servo design

• Self diagnostics performed when power is applied to the drive

• Zoned bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 8,192 kbytes data buffer

• Hot plug compatibility (Section 9.6.4.2 lists proper host connector needed) for LC model drives

• Drive Self Test (DST)

• BackGround Media Scan (BGMS)

• Data Integrity Check

• Power Save

• Supports SCSI bus fairness

3.2

Media characteristics

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated

with a proprietary protective layer for improved durability and environmental protection.

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3.3

Performance

• Supports industry standard Ultra320 SCSI interface

• Programmable multi-segmentable cache buffer (see Section 4.5)

• 10,000 RPM spindle. Average latency = (3.00) ms

• Command queuing of up to 64 commands

• Background processing of queue

• Supports start and stop commands (spindle stops spinning)

3.4

Reliability

• Annualized Failure Rate (AFR) of 0.62%

• LSI circuitry

• Balanced low mass rotary voice coil actuator

• Incorporates industry-standard Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.)

• 5-year warranty

3.5

Formatted capacities

Standard OEM models are formatted to 512 bytes per block. The sector size is selectable at format time. Users

having the necessary equipment may modify the data block size before issuing a format command and obtain

different formatted capacities than those listed.

To provide a stable target capacity environment and at the same time provide users with flexibility if they

choose, Seagate recommends product planning in one of two modes:

1. Seagate designs specify capacity points at certain sector sizes that Seagate guarantees current and future

products will meet. We recommend customers use this capacity in their project planning, as it ensures a

stable operating point with backward and forward compatibility from generation to generation. The current

guaranteed operating points for this product are:

ST373207

ST3146707

Decimal

ST3300007

Decimal

Sector Size

512

Decimal

Hex

143,374,744

141,025,384

140,395,092

139,463,602

137,577,184

88BB998

867E068

85E4254

8500BB2

83342E0

286,749,488

282,050,768

280,790,184

279,041,740

275,154,368

11177330

10CFC0D0

10BC84A8

10A1D6CC

106685C0

585,937,500

574,712,644

573,653,847

570,053,000

566,007,800

557,874,778

22ECB25C

22416B44

22314357

21FA5188

21BC97F8

21407E5A

514

520

522

524

528

2. Seagate drives also may be used at the maximum available capacity at a given sector size, but the excess

capacity above the guaranteed level will vary between 10K and 15K families and from generation to gener-

ation, depending on how each sector size actually formats out for zone frequencies and splits over servo

bursts. This added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities

listed above. Using the drives in this manner gives the absolute maximum capacity potential, but the user

must determine if the extra capacity potential is useful, or whether their assurance of backward and for-

ward compatibility takes precedence.

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3.5.1

Programmable drive capacity

Using the Mode Select command, the drive can change its capacity to something less than maximum. See the

Mode Select Parameter List table in the SCSI Interface Product Manual. Refer to the Parameter list block

descriptor number of blocks field. A value of zero in the number of blocks field indicates that the drive shall not

change the capacity it is currently formatted to have. A number in the number of blocks field that is less than

the maximum number of LBAs changes the total drive capacity to the value in the block descriptor number of

blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.

3.6

Factory installed accessories

OEM Standard drives are shipped with the Cheetah 10K.7 SCSI Installation Guide, part number 100260917,

and the Safety and Regulatory Agency Specifications, part number 75789512 (unless otherwise specified).

The factory also ships with the drive a small bag of jumper plugs used for the J2, J5, and J6 option select

jumper headers on LW models only.

3.7

Options (factory installed)

All customer requested options are incorporated during production or packaged at the manufacturing facility

before shipping. Some of the options available are (not an exhaustive list of possible options):

• Other capacities can be ordered depending on sparing scheme and sector size requested.

• Single unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection

against transit damage. Units shipped individually require additional protection as provided by the single unit

shipping pack. Users planning single unit distribution should specify this option.

• The Cheetah 10K.7 SCSI Installation Guide, part number 100260917, is usually included with each standard

OEM drive shipped, but extra copies may be ordered.

• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each

standard OEM drive shipped, but extra copies may be ordered.

3.8

Accessories (user installed)

The following accessories are available. All accessories may be installed in the field.

• Single unit shipping pack.

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4.0

Performance characteristics

4.1

Internal drive characteristics (transparent to user)

ST3300007

300.0

ST3146707 ST373207

Drive capacity

146.8

73.4

GByte (formatted, rounded off values)

Read/write heads

Bytes/track

556

Kbytes (average, rounded off values)

Bytes/surface

50.5

90,774

105,000

658

Gbytes (unformatted, rounded off values)

Tracks/surface (total)

Tracks/inch

90,774

105,000

658

90,774

105,000

658

Tracks (user accessible)

TPI

Peak bits/inch

KBPI

Internal data rate

Disc rotational speed

470 - 944

10,000

470 - 944 470 - 944 Mbits/sec (variable with zone)

10,000

3.00

10,000

3.00

r/min

msec

Average rotational latency 3.00

4.2

SCSI performance characteristics (visible to user)

The values given in Section 4.2.1 apply to all models of the Cheetah 10K.7 SCSI family unless otherwise spec-

ified. Refer to Section 9.10 and to the SCSI Interface Product Manual for additional timing details.

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4.2.1

Access time [4]

Not including controller overhead

(without disconnect) [1]

(ST3300007 data shown)

Drive level

Read

Write

msec

Average—Typical [2]

4.9

5.4

Single Track—Typical [2]

Full Stroke—Typical [2]

0.45

9.9

0.65

10.5

4.2.2

Format command execution time (minutes) [1]

ST3300007

200

ST3146707

ST373207

Maximum (with verify)

Maximum (no verify)

100

4.2.3

Generalized performance characteristics

1 to 1

Minimum sector interleave

Data buffer transfer rate to/from disc media (one 512-byte sector):

ST3300007

ST3146707

ST373207

Minimum*

Maximum

MBytes/sec

118

Sustainable disc transfer rate:

ST3300007

ST3146707

ST373207

Minimum*

Maximum

MBytes/sec

Note. 1 Megabyte (MB) = 1,000,000 bytes.

SCSI interface data transfer rate (asynchronous):

Maximum instantaneous one byte wide

Maximum instantaneous two bytes wide

5.0 Mbytes/sec [3]

10.0 Mbytes/sec [3]

Synchronous transfer rate

Ultra320 SCSI

In low voltage differential (LVD) interface mode

5.0 to 320 Mbytes/sec

Sector Sizes:

Default

512 byte user data blocks

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Variable

512 to 528 bytes per sector in even number of bytes per sector.

If n (number of bytes per sector) is odd, then n-1 will be used.

Read/write consecutive sectors on a track

Yes

Flaw reallocation performance impact (for flaws reallocated at format time using

the spare sectors per sparing zone reallocation scheme.)

Negligible

Average rotational latency

3.0 msec

Notes for Section 4.2.

[1] Execution time measured from receipt of the last byte of the Command Descriptor Block (CDB) to the

request for a Status Byte Transfer to the Initiator (excluding connect/disconnect).

[2] Typical access times are measured under nominal conditions of temperature, voltage, and horizontal ori-

entation as measured on a representative sample of drives.

[3] Assumes system ability to support the rates listed and no cable loss.

[4] Access to data = access time + latency time.

4.3

Start/stop time

After DC power at nominal voltage has been applied, the drive becomes ready within 25 seconds if the Motor

Start Option is disabled (i.e. the motor starts as soon as the power has been applied). If a recoverable error

condition is detected during the start sequence, the drive executes a recovery procedure which may cause the

time to become ready to exceed 25 seconds. During spin up to ready time the drive responds to some com-

mands over the SCSI interface in less than 3 seconds after application of power. Stop time is 30 seconds from

removal of DC power.

If the Motor Start Option is enabled, the internal controller accepts the commands listed in the SCSI Interface

Product Manual less than 3 seconds after DC power has been applied. After the Motor Start Command has

been received the drive becomes ready for normal operations within 25 seconds typically (excluding an error

recovery procedure). The Motor Start Command can also be used to command the drive to stop the spindle

(see the SCSI Interface Product Manual).

There is no power control switch on the drive.

4.4

Prefetch/multi-segmented cache control

The drive provides prefetch (read look-ahead) and multi-segmented cache control algorithms that in many

cases can enhance system performance. “Cache” as used herein refers to the drive buffer storage space when

it is used in cache operations. To select prefetch and cache features the host sends the Mode Select command

with the proper values in the applicable bytes in Mode Page 08h (see the SCSI Interface Product Manual).

Prefetch and cache operation are independent features from the standpoint that each is enabled and disabled

independently via the Mode Select command. However, in actual operation the prefetch feature overlaps

cache operation somewhat as is noted in Section 4.5.1 and 4.5.2.

All default cache and prefetch Mode parameter values (Mode Page 08h) for standard OEM versions of this

drive family are given in Tables 7, 8, and 9.

4.5

Cache operation

In general, 6,991 kbytes of the physical buffer space in the drive can be used as storage space for cache oper-

ations. The buffer can be divided into logical segments (Mode Select Page 08h, byte 13) from which data is

read and to which data is written. The drive supports a maximum of 64 cache segments. The drive maintains a

table of logical block disc medium addresses of the data stored in each segment of the buffer. If cache opera-

tion is enabled (RCD bit = 0 in Mode Page 08h, byte 2, bit 0. See SCSI Interface Product Manual), data

requested by the host with a Read command is retrieved from the buffer (if it is there), before any disc access

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is initiated. If cache operation is not enabled, the buffer (still segmented with required number of segments) is

still used, but only as circular buffer segments during disc medium read operations (disregarding Prefetch

operation for the moment). That is, the drive does not check in the buffer segments for the requested read

data, but goes directly to the medium to retrieve it. The retrieved data merely passes through some buffer seg-

ment on the way to the host. On a cache miss, all data transfers to the host are in accordance with buffer-full

ratio rules. On a cache hit the drive ignores the buffer-full ratio rules. See explanations associated with Mode

page 02h (disconnect/reconnect control) in the SCSI Interface Product Manual.

The following is a simplified description of a read operation with cache operation enabled:

Case A - A Read command is received and the first logical block (LB) is already in cache:

1. Drive transfers to the initiator the first LB requested plus all subsequent contiguous LBs that are already in

the cache. This data may be in multiple segments.

2. When the requested LB is reached that is not in any cache segment, the drive fetches it and any remaining

requested LBs from the disc and puts them in a segment of the cache. The drive transfers the remaining

requested LBs from the cache to the host in accordance with the disconnect/reconnect specification men-

tioned above.

3. If the prefetch feature is enabled, refer to Section 4.5.2 for operation from this point.

Case B - A Read command requests data, the first LB of which is not in any segment of the cache:

1. The drive fetches the requested LBs from the disc and transfers them into a segment, and from there to

the host in accordance with the disconnect/reconnect specification referred to in case A.

2. If the prefetch feature is enabled, refer to Section 4.5.2 for operation from this point.

Each buffer segment is actually a self-contained circular storage (wrap-around occurs), the length of which is

an integer number sectors. The wrap-around capability of the individual segments greatly enhances the

buffer’s overall performance as a cache storage, allowing a wide range of user selectable configurations, which

includes their use in the prefetch operation (if enabled), even when cache operation is disabled (see Section

4.5.2). The number of segments is set dynamically by the drive and cannot normally be set by the host (it can

be set using the PM bit as described in Section 4.5.3). The size in Kbytes of each segment is not reported by

the Mode Sense command page 08h, bytes 14 and 15. The value 0XFFFF is always reported. If a size specifi-

cation is sent by the host in a Mode Select command (bytes 14 and 15) no new segment size is set up by the

drive, and if the STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any

attempt to change unchangeable parameters (see SCSI Interface Product Manual).

4.5.1

Caching write data

Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to

be written to the medium is stored in one or more segments while the drive performs the write command.

If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made avail-

able for future read cache hits. The same buffer space and segmentation is used as set up for read functions.

The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of

RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that

are to be written are already stored in the cache from a previous read or write command. If there are, the

respective cache segments are cleared. The new data is cached for subsequent Read commands.

If the number of write data logical blocks exceeds the size of the segment being written into, when the end of

the segment is reached, the data is written into the beginning of the same cache segment, overwriting the data

that was written there at the beginning of the operation. However, the drive does not overwrite data that has not

yet been written to the medium.

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If write caching is enabled (WCE=1), then the drive may return GOOD status on a write command after the

data has been transferred into the cache, but before the data has been written to the medium. If an error

occurs while writing the data to the medium, and GOOD status has already been returned, a deferred error will

be generated.

The Synchronize Cache command may be used to force the drive to write all cached write data to the medium.

Upon completion of a Synchronize Cache command, all data received from previous write commands will have

been written to the medium.

Tables 7, 8, and 9 show Mode default settings for the drives.

4.5.2

Prefetch operation

If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which

was requested by a Read command can be retrieved and stored in the buffer for immediate transfer from the

buffer to the host on subsequent Read commands that request those logical blocks (this is true even if cache

operation is disabled). Though the prefetch operation uses the buffer as a cache, finding the requested data in

the buffer is a prefetch hit, not a cache operation hit. Prefetch is enabled using Mode Select page 08h, byte 12,

bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch. Since data that is prefetched replaces

data already in some buffer segment(s), the host can limit the amount of prefetch data to optimize system per-

formance. The max prefetch field (bytes 8 and 9) limits the amount of prefetch. The drive does not use the

Prefetch Ceiling field (bytes 10 and 11).

During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if the Discontinuity

(DISC) bit is set to one in bit 4 of byte 2 of Mode parameters page 08h.

Whenever prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA

(Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables prefetch of contiguous

blocks from the disc when it senses that a prefetch hit will likely occur, even if two consecutive read operations

were not for physically contiguous blocks of data (e.g., “software interleave”). ARLA disables prefetch when it

decides that a prefetch hit will not likely occur. If the host is not using software interleave, and if two sequential

read operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read

operations request contiguous blocks of data, ARLA keeps prefetch enabled.

4.5.3

Optimizing cache performance for desktop and server applications

Desktop and server applications require different drive caching operations for optimal performance. This

means it is difficult to provide a single configuration that meets both of these needs. In a desktop environment,

you want to configure the cache to respond quickly to repetitive accesses of multiple small segments of data

without taking the time to “look ahead” to the next contiguous segments of data. In a server environment, you

want to configure the cache to provide large volumes of sequential data in a non-repetitive manner. In this

case, the ability of the cache to “look ahead” to the next contiguous segments of sequential data is a good

thing.

The Performance Mode (PM) bit controls the way the drive switches the cache buffer into different modes of

segmentation. In “server mode” (PM bit = 0), the drive can dynamically change the number of cache buffer

segments as needed to optimize the performance, based on the command stream from the host. In “desktop

mode” (PM bit = 1), the number of segments is maintained at the value defined in Mode Page 8, Byte 13, at all

times (unless changed by using a Mode Select command). For additional information about the PM bit, refer to

the Unit Attention Parameters page (00h) of the Mode Sense command (1Ah) in the SCSI Interface Product

Manual, part number 75789509.

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5.0

Reliability specifications

The following reliability specifications assume correct host/drive operational interface, including all interface

timings, power supply voltages, environmental requirements and drive mounting constraints (see Section 8.4).

Less than 10 in 10⁸seeks

Seek Errors

Read Error Rates [1]

Recovered Data

Unrecovered Data

Miscorrected Data

AFR

Less than 10 errors in 10¹²bits transferred (OEM default settings)

Less than 1 sector in 10¹⁵bits transferred (OEM default settings)

Less than 1 sector in 10²¹bits transferred

0.62%

Service Life

5 years

Preventive Maintenance

None required

Note.

[1] Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.

5.1 Error rates

The error rates stated in this specification assume the following:

• The drive is operated per this specification using DC power as defined in this manual (see Section 6.2).

• Errors caused by host system failures are excluded from error rate computations.

• Assume random data.

• Default OEM error recovery settings are applied. This includes AWRE, ARRE, full read retries, full write

retries and full retry time.

5.1.1

Recoverable Errors

Recovereable errors are those detected and corrected by the drive, and do not require user intervention.

Recoverable Data errors will use correction, although ECC on-the-fly is not considered for purposes of recov-

ered error specifications.

Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a

read, and using write bits transferred for recoverable errors occurring during a write.

5.1.2

Unrecoverable Errors

Unrecoverable Data Errors (Sense Key = 03h) are specified at less than 1 sector in error per 10¹⁵bits trans-

ferred. Unrecoverable Data Errors resulting from the same cause are treated are 1 error for that block.

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5.1.3

Seek errors

A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an

initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,

a seek positioning error (Error code = 15h or 02h) will be reported with a Hardware error (04h) in the Sense

Key. Recoverable seek errors are specified at Less than 10 errors in 10⁸seeks. Unrecoverable seek errors

(Sense Key = 04h) are classified as drive failures.

5.2

Reliability and service

You can enhance the reliability of Cheetah 10K.7 SCSI disc drives by ensuring that the drive receives ade-

quate cooling. Section 6.0 provides temperature measurements and other information that may be used to

enhance the service life of the drive. Section 8.3 provides recommended air-flow information.

5.2.1

Annualized Failure Rate (AFR)

The production disc drive shall achieve an AFR of 0.62% when operated in an environment that ensures the

HDA case temperatures specified in Section 6.4 are not exceeded. Short-term excursions up to the specifica-

tion limits of the operating environment will not affect AFR performance. Continual or sustained operation at

case temperatures above the values shown in Section 6.4.1 may degrade product reliability.

Estimated power-on operation hours means power-up hours per disc drive times the total number of disc

drives in service. Each disc drive shall have accumulated at least nine months of operation. Data shall be cal-

culated on a rolling average base for a minimum period of six months.

AFR is based on the following assumptions:

• 8,760 power-on hours per year.

• 250 average on/off cycles per year.

• Operations at nominal voltages.

• Systems will provide adequate cooling to ensure the case temperatures specified in Section 6.4.1 are not

exceeded.

Drive failure means any stoppage or substandard performance caused by drive malfunction.

A S.M.A.R.T. predictive failure indicates that the drive is deteriorating to an imminent failure and is considered

an AFR hit.

5.2.2

Preventive maintenance

No routine scheduled preventive maintenance shall be required.

5.2.3

Hot plugging Cheetah 10K.7 SCSI disc drives

The ANSI SPI-3 (T10/1302D) document defines the physical requirements for removal and insertion of SCSI

devices on the SCSI bus. Four cases are addressed. The cases are differentiated by the state of the SCSI bus

when the removal or insertion occurs.

Case 1 - All bus devices powered off during removal or insertion

Case 2 - RST signal asserted continuously during removal or insertion

Case 3 - Current I/O processes not allowed during insertion or removal

Case 4 - Current I/O process allowed during insertion or removal, except on the device being changed

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Seagate Cheetah 10K.7 SCSI disc drives support all four hot plugging cases. Provision shall be made by the

system such that a device being inserted makes power and ground connections prior to the connection of any

device signal contact to the bus. A device being removed shall maintain power and ground connections after

the disconnection of any device signal contact from the bus (see SFF-8451 Specification for SCA-2 Unshielded

Connections).

It is the responsibility of the systems integrator to assure that no hazards from temperature, energy, voltage, or

ESD potential are presented during the hot connect/disconnect operation.

All I/O processes for the SCSI device being inserted or removed shall be quiescent. All SCSI devices on the

bus shall have receivers that conform to the SPI-3 standard.

If the device being hot plugged uses single-ended (SE) drivers and the bus is currently operating in low voltage

differential (LVD) mode, then all I/O processes for all devices on the bus must be completed, and the bus qui-

esced, before attempting to hot plug. Following the insertion of the newly installed device, the SCSI host

adapter must issue a Bus Reset, followed by a synchronous transfer negotiation. Failure to perform the SCSI

Bus Reset could result in erroneous bus operations.

The SCSI bus termination and termination power source shall be external to the device being inserted or

removed.

End users should not mix devices with high voltage differential (HVD) drivers and receivers and devices with

SE, LVD, or multimode drivers and receivers on the same SCSI bus since the common mode voltages in the

HVD environment may not be controlled to safe levels for SE and LVD devices (see ANSI SPI-3).

The disc drive spindle must come to a complete stop prior to completely removing the drive from the cabinet

chassis. Use of the Stop Spindle command or partial withdrawal of the drive, enough to be disconnected from

the power source, prior to removal are methods for insuring that this requirement is met. During drive insertion,

care should be taken to avoid exceeding the limits stated in Section 6.4.4, "Shock and vibration" in this manual.

5.2.4

S.M.A.R.T.

S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended

to recognize conditions that indicate drive degradation and is designed to provide sufficient warning of a failure

to allow data back-up before an actual failure occurs.

Note. The firmware will monitor specific attributes for degradation over time but cannot predict instanta-

neous drive failures.

Each attribute monitors a specific set of conditions in the operating performance of the drive, and the thresh-

olds are optimized to minimize “false” predictions.

Controlling S.M.A.R.T.

The operating mode of S.M.A.R.T. is controlled by the DEXCPT bit and the PERF bit of the “Informational

Exceptions Control Mode Page” (1Ch). The DEXCPT bit is used to enable or disable the S.M.A.R.T. process.

Setting the DEXCPT bit will disable all S.M.A.R.T. functions. When enabled, S.M.A.R.T. will collect on-line data

as the drive performs normal read/write operations. When the PERF bit is set, the drive is considered to be in

“On-line Mode Only” and will not perform off-line functions.

The process of measuring off-line attributes and saving data can be forced by the Rezero Unit command. Forc-

ing S.M.A.R.T. will reset the timer so that the next scheduled interrupt will be two hours.

The drive can be interrogated by the host to determine the time remaining before the next scheduled measure-

ment and data logging process will occur. This is accomplished by a log sense command to log page 0x3E.

The purpose is to allow the customer to control when S.M.A.R.T. interruptions occur. As described above, forc-

ing S.M.A.R.T by the Rezero Unit command will reset the timer.

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Performance impact

S.M.A.R.T. attribute data will be saved to the disc for the purpose of recreating the events that caused a predic-

tive failure. The drive will measure and save parameters once every two hours subject to an idle period on the

SCSI bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable and

the maximum delay is summarized below:

Maximum processing delay

On-line only delay

DEXCPT = 0, PERF = 1

60 milliseconds

Fully enabled delay

DEXCPT = 0, PERF = 0

370 milliseconds

S.M.A.R.T. delay times

Reporting control

Reporting is controlled in the Informational Exceptions Control Page (1Ch). Subject to the reporting method,

the firmware will report a predictive 01-5D00 sense code. The error code is preserved through bus resets and

power cycles.

Determining rate

S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded error

rate increases to an unacceptable level. To determine rate, error events are logged and compared to the num-

ber of total operations for a given attribute. The interval defines the number of operations over which to mea-

sure the rate. The counter that keeps track of the current number of operations is referred to as the Interval

Counter.

S.M.A.R.T. measures error rate, hence for each attribute the occurrence of an error is recorded. A counter

keeps track of the number of errors for the current interval. This counter is referred to as the Failure Counter.

Error rate is simply the number of errors per set of operations. The algorithm that S.M.A.R.T. uses to record

rates of error is to set thresholds for the number of errors and the interval. If the number of errors exceeds the

threshold before the interval expires, then the error rate is considered to be unacceptable. If the number of

errors does not exceed the threshold before the interval expires, then the error rate is considered to be accept-

able. In either case, the interval and failure counters are reset and the process starts over.

Predictive failures

S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firm-

ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom-

plish this, a counter is incremented whenever the error rate is unacceptable and decremented (not to exceed

zero) whenever the error rate is acceptable. This counter is referred to as the Failure History Counter. There is

a separate Failure History Counter for each attribute. Should the counter continually be incremented such that

it reaches the predictive threshold, a predictive failure is signaled.

5.2.5

Thermal monitor

Cheetah 10K.7 SCSI drives implement a temperature warning system which:

1. Signals the host if the temperature exceeds a value which would threaten the drive.

2. Signals the host if the temperature exceeds a user-specified value.

3. Saves a S.M.A.R.T. data frame on the drive which exceed the threatening temperature value.

A temperature sensor monitors the drive temperature and issues a warning over the interface when the tem-

perature exceeds a set threshold. The temperature is measured at power-up and then at ten-minute intervals

after power-up.

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The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the speci-

fied limit in compliance with the SCSI standard. The drive temperature is reported in the FRU code field of

mode sense data. You can use this information to determine if the warning is due to the temperature exceeding

the drive threatening temperature or the user-specified temperature.

This feature is controlled by the Enable Warning (EWasc) bit, and the reporting mechanism is controlled by the

Method of Reporting Informational Exceptions field (MRIE) on the Informational Exceptions Control (IEC)

mode page (1Ch).

The current algorithm implements two temperature trip points. The first trip point is set at 68°C which is the

maximum temperature limit according to the drive specification. The second trip point is user-selectable using

the Log Select command. The reference temperature parameter in the temperature log page (see Table 1) can

be used to set this trip point. The default value for this drive is 68°C, however, you can set it to any value in the

range of 0 to 68°C. If you specify a temperature greater than 68°C in this field, the temperature is rounded

down to 68°C. A sense code is sent to the host to indicate the rounding of the parameter field.

Table 1:

Temperature Log page (0Dh)

Parameter Code

Description

0000h

0001h

Primary Temperature

Reference Temperature

When the first temperature trip point is exceeded, S.M.A.R.T. data is collected and a frame is saved to the disc.

5.2.6 Drive Self Test (DST)

Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a

failed unit. DST validates the functionality of the drive at a system level.

There are two test coverage options implemented in DST:

1. Extended test

2. Short text

The most thorough option is the extended test that performs various tests on the drive and scans every logical

block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the

entire media surface, but does some fundamental tests and scans portions of the media.

If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test,

remove it from service and return it to Seagate for service.

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5.2.6.1

DST Failure Definition

The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log

page if a functional failure is encountered during DST. The channel and servo parameters are not modified to

test the drive more stringently, and the number of retries are not reduced. All retries and recovery processes

are enabled during the test. If data is recoverable, no failure condition will be reported regardless of the number

of retries required to recover the data.

The following conditions are considered DST failure conditions:

• Seek error after retries are exhausted

• Track-follow error after retries are exhausted

• Read error after retries are exhausted

• Write error after retries are exhausted

Recovered errors will not be reported as diagnostic failures.

5.2.6.2

Implementation

This section provides all of the information necessary to implement the DST function on this drive.

5.2.6.2.1

State of the drive prior to testing

The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons

why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be

in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not

ready” cause.

While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a

failed drive.

A Drive Not Ready condition is reported by the drive under the following conditions:

• Motor will not spin

• Motor will not lock to speed

• Servo will not lock on track

• Drive cannot read configuration tables from the disc

In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.

5.2.6.2.2

Invoking DST

To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short

test or 010b for the extended test) in bytes 1, bits 5, 6, and 7. Refer to the Seagate SCSI Interface Product

Manual, part number 75789509, for additional information about invoking DST.

5.2.6.2.3

Short and extended tests

DST has two testing options:

1. short

2. extended

These testing options are described in the following two subsections.

Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan

segment.

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Short test (Function Code: 001b)

The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within

120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and

scans portions of the media. A complete read/verify scan is not performed and only factual failures will report a

fault condition. This option provides a quick confidence test of the drive.

Extended test (Function Code: 010b)

The objective of the extended test option is to empirically test critical drive components. For example, the seek

tests and on-track operations test the positioning mechanism. The read operation tests the read head element

and the media surface. The write element is tested through read/write/read operations. The integrity of the

media is checked through a read/verify scan of the media. Motor functionality is tested by default as a part of

these tests.

The anticipated length of the Extended test is reported through the Control Mode page.

5.2.6.2.4

Log page entries

When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry is created

by inserting a new self-test parameter block at the beginning of the self-test results log parameter section of the

log page. Existing data will be moved to make room for the new parameter block. The drive reports 20 param-

eter blocks in the log page. If there are more than 20 parameter blocks, the least recent parameter block will be

deleted. The new parameter block will be initialized as follows:

1. The Function Code field is set to the same value as sent in the DST command

2. The Self-Test Results Value field is set to Fh

3. The drive will store the log page to non-volatile memory

After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its Self-

Test Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the

last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the

test. If the field is zero, the drive passed with no errors detected by the DST. If the field is not zero, the test

failed for the reason reported in the field.

The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The

Sense key, ASC, ASCQ, and FRU are used to report the failure condition.

5.2.6.2.5

Abort

There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message

to abort the diagnostic.

You can abort a DST executing in background mode by using the abort code in the DST Function Code field.

This will cause a 01 (self-test aborted by the application client) code to appear in the self-test results values

log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).

5.2.7

Product warranty

Beginning on the date of shipment to customer and continuing for a period of five years, Seagate warrants that

each product (including components and subassemblies) or spare part that fails to function properly under nor-

mal use due to defect in materials on workmanship or due to nonconformance to the applicable specifications

will be repaired or replaced, at Seagate’s option and at no charge to customer, if returned by customer at cus-

tomer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate

will pay for transporting the repair or replacement item to customer. For more detailed warranty information

refer to the Standard terms and conditions of Purchase for Seagate products.

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Shipping

When transporting or shipping a drive, a Seagate approved container must be used. Keep your original box.

They are easily identified by the Seagate-approved package label. Shipping a drive in a non-approved con-

tainer voids the drive warranty.

Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran-

sit. Contact your Authorized Seagate Distributor to purchase additional boxes. Seagate recommends shipping

by an air-ride carrier experienced in handling computer equipment.

Product repair and return information

Seagate authorized customer service centers are the only facilities authorized to service Seagate drives.

Seagate does not sanction any third-party repair facilities. Any unauthorized repair or tampering with the fac-

tory-seal voids the warranty.

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6.0

Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the Cheetah 10K.7

SCSI drive.

6.1

AC power requirements

None.

6.2

DC power requirements

The voltage and current requirements for a single drive are shown in the following tables. Values indicated

apply at the drive power connector. The table shows current values in Amperes.

Table 2:

DC power requirements

ST3300007

Notes

SE mode

+12 V

LVD mode

Voltage

+5 V

±5%

0.54

+5 V

+12 V

±5%[2]

0.62

Regulation

[5]

±5%[2]

0.62

±5%

0.54

Average idle current DC

[1][7]

Maximum starting current

(peak DC) DC

(peak AC) AC

3σ

[3]

0.77

1.16

1.91

3.71

0.77

1.16

1.91

3.88

Delayed motor start (max) DC 3σ

[1][4]

0.52

0.06

0.53

0.06

Peak operating current

3σ

[1][6]

[1]

0.69

0.70

1.62

1.07

1.08

2.74

0.68

0.69

1.62

1.09

1.10

2.76

Maximum DC

Maximum (peak) DC

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ST3146707

Notes

SE mode

+12 V

LVD mode

+12 V

Voltage

+5V

±5%

0.54

+5V

Regulation

[5]

±5%[2]

0.42

±5%

0.54

±5%[2]

0.42

Average idle current DC

[1][7]

Maximum starting current

(peak DC) DC

(peak AC) AC

3σ

[3]

0.77

1.09

1.89

3.66

0.76

1.06

1.89

3.83

Delayed motor start (max) DC 3σ

[1][4]

0.54

0.06

0.54

0.06

Peak operating current

3σ

[1][6]

[1]

0.60

0.62

1.52

0.81

0.83

2.50

0.61

0.63

1.44

0.83

0.85

2.48

Maximum DC

Maximum (peak) DC

ST373207

Notes

SE mode

+12 V

LVD mode

Voltage

+5 V

±5%

0.54

+5 V

+12 V

±5%[2]

0.34

Regulation

[5]

±5%[2]

0.34

±5%

0.54

Average idle current DC

[1][7]

Maximum starting current

(peak DC) DC

(peak AC) AC

3σ

[3]

0.76

1.08

1.55

3.04

0.77

1.03

1.56

3.36

Delayed motor start (max) DC 3σ

[1][4]

0.54

0.06

0.54

0.06

Peak operating current

3σ

[1][6]

[1]

0.62

0.63

1.56

0.73

0.76

2.46

0.60

0.61

1.48

0.72

0.74

2.40

Maximum DC

Maximum (peak) DC

[1] Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous current peaks

will exceed these values. Power supply at nominal voltage. Number of drives tested = 6, 35 Degrees C

ambient.

[2] For +12 V, a –10% tolerance is permissible during initial start of spindle, and must return to ±5% before

10,000 rpm is reached. The ±5% must be maintained after the drive signifies that its power-up sequence

has been completed and that the drive is able to accept selection by the host initiator.

[3] See +12 V current profile in Figure 2.

[4] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start

Motor command.

[5] See Section 6.2.1 “Conducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise,

and transient response.

[6] Operating condition is defined as random 8 block reads at:

257 I/Os per second (ST3300007) LVD

257 I/Os per second (ST3146707) LVD

256 I/Os per second (ST373207) LVD

Current and power specified at nominal voltages. Decreasing +5 volts by 5% increases 5 volt current by

<0.5%. Decreasing +12 volt supply by 5% increases 12 volt current by 1.4% (2% for ST3146707 and

ST373207 models).

[7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from

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three-quarters to maximum track.

General Notes from Table 2:

1. Minimum current loading for each supply voltage is not less than 1.2% of the maximum operating current

shown.

2. The +5 and +12 volt supplies shall employ separate ground returns.

3. Where power is provided to multiple drives from a common supply, careful consideration for individual

drive power requirements should be noted. Where multiple units are powered on simultaneously, the peak

starting current must be available to each device.

4. Parameters, other than spindle start, are measured after a 10-minute warm up.

5. No terminator power.

6.2.1

Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 20 MHz.

Maximum allowed noise values given below are peak to peak measurements and apply at the drive power con-

nector.

+5 V = 250 mV pp from 100 Hz to 20 MHz.

+12 V = 800 mV pp from 100 Hz to 8 KHz.

450 mV pp from 8 KHz to 20 KHz.

250 mV pp from 20 KHz to 5 MHz.

6.2.2

Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up

and down. Daisy-chain operation requires that power be supplied to the SCSI bus terminator to ensure proper

termination of the peripheral I/O cables. To automatically delay motor start based on the target ID (SCSI ID)

enable the Delay Motor Start option and disable the Enable Motor Start option on the J2 connector on LW mod-

els or on the backplane for LC models. See Section 8.1 for pin selection information. To delay the motor until

the drive receives a Start Unit command, enable the Enable Remote Motor Start option on the J2 connector on

LW models or on the backplane for LC models.

6.2.3

12 V - Current profile

Figure 2, 4 and 6 identify the drive +12 V current profiles and figures 3, 5 and 7 identify the drive +5 V current

profiles. The current during the various times is as shown:

T0 - Power is applied to the drive.

T1 - Controller self tests are performed.

T2 - Spindle begins to accelerate under current limiting after performing drive internal diagnostics. See

Note 1 of Table 2.

T3 - The spindle is up to speed and the head-arm restraint is unlocked.

T4 - The adaptive servo calibration sequence is performed.

T5 - Calibration is complete and drive is ready for reading and writing.

Note. All times and currents are typical. See Table 2 for maximum current requirements.

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Figure 2. Typical ST3300007 drive +12 V current profile

Figure 3. Typical ST3300007 drive +5 V current profile

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Figure 4. Typical ST3146707 drive +12 V current profile

Figure 5. Typical ST3146707 drive +5 V current profile

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Figure 6. Typical ST373207 drive +12 V current profile

Figure 7. Typical ST373207 drive +5 V current profile

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6.3

Power dissipation

ST3300007

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.14 watts

(34.60 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is

10.14 watts (34.60 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see

Figures 8 and 9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor-

responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour,

multiply watts by 3.4123.

ST3300007LC DC CURRENT/POWER vs THROUGHPUT (SE) Random 8 Block Reads

1.800

1.600

1.400

1.200

1.000

0.800

0.600

0.400

0.200

0.000

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o lt A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 8. ST3300007 DC current and power vs. input/output operations per second (SE)

ST3300007LC DC CURRENT/POWER vs THROUGHPUT (LVD) Random 8 Block Reads

1.8 0 0

1.6 0 0

1.4 0 0

1.2 0 0

1.0 0 0

0.800

0.600

0.400

0.200

0.000

18 .0 0

16 .0 0

14 .0 0

12 .0 0

10 .0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o l t A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 9. ST3300007 DC current and power vs. input/output operations per second (LVD)

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ST3146707

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 7.74 watts

(26.41 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.74

watts (26.41 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see

Figures 8 and 9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor-

responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour,

multiply watts by 3.4123.

ST3146707LC DC CURRENT/POWER vs THROUGHPUT (SE) Random 8 Block Reads

1. 8 0 0

1. 6 0 0

1. 4 0 0

1. 2 0 0

1. 0 0 0

0.800

0.600

0.400

0.200

0.000

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o lt A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 10. ST3146707 DC current and power vs. input/output operations per second (SE)

ST3146707LC DC CURRENT/POWER vs THROUGHPUT (LVD) Random 8 Block Reads

1. 8 0 0

1. 6 0 0

1. 4 0 0

1. 2 0 0

1. 0 0 0

0.800

0.600

0.400

0.200

0.000

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o lt A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 11. ST3146707 DC current and power vs. input/output operations per second (LVD)

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ST373207

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 6.78 watts

(23.14 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 6.78

watts (23.14 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see

Figures 8 and 9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor-

responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour,

multiply watts by 3.4123.

ST373207LC DC CURRENT/POWER vs THROUGHPUT (SE) Random 8 Block Reads

1.800

1.600

1.400

1.200

1.000

0.800

0.600

0.400

0.200

0.000

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o lt A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 12. ST373207 DC current and power vs. input/output operations per second (SE)

ST373207LC DC CURRENT/POWER vs THROUGHPUT (LVD) Random 8 Block Re ads

1.800

1.600

1.400

1.200

1.000

0.800

0.600

0.400

0.200

0.000

18 . 0 0

16 . 0 0

14 . 0 0

12 . 0 0

10 . 0 0

8.00

6.00

4.00

2.00

0.00

5Volt A

12 V o lt A

Watts

0.0

50.0

100.0

150.0

200.0

250.0

300.0

I/Os per Second

Figure 13. ST373207 DC current and power vs. input/output operations per second (LVD)

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6.4

Environmental limits

Temperature and humidity values experienced by the drive must be such that condensation does not occur on

any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F

(14.8°C). Maximum wet bulb temperature is 82°F (28°C).

6.4.1

Temperature

a. Operating

The maximum allowable continuous or sustained HDA case temperature for the rated AFR is 122°F (50°C)

The maximum allowable HDA case temperature is 60°C. Occasional excursions of HDA case temperatures

above 122°F (50°C) or below 41°F (5°C) may occur without impact to specified AFR. Continual or sustained

operation at HDA case temperatures outside these limits may degrade AFR.

Provided the HDA case temperatures limits are met, the drive meets all specifications over a 41°F to 131°F

(5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C) per

hour. Air flow may be needed in the drive enclosure to keep within this range (see Section 8.3). Operation at

HDA case temperatures outside this range may adversely affect the drives ability to meet specifications. To

confirm that the required cooling for the electronics and HDA case is provided, place the drive in its final

mechanical configuration, perform random write/read operations and measure the HDA case temperature

after it has stabilized.

b. Non-operating

–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This

specification assumes that the drive is packaged in the shipping container designed by Seagate for use with

drive.

HDA Temp.

Check Point

.0"

.5"

Figure 14. Location of the HDA temperature check point

6.4.2 Relative humidity

The values below assume that no condensation on the drive occurs.

a. Operating

5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour.

b. Non-operating

5% to 95% non-condensing relative humidity.

6.4.3

Effective altitude (sea level)

a. Operating

–1,000 to +10,000 feet (–305 to +3,048 meters)

b. Non-operating

–1,000 to +40,000 feet (–305 to +12,210 meters)

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6.4.4

Shock and vibration

Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is

installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur

internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,

it may be necessary to modify the enclosure to minimize drive movement.

The limits of shock and vibration defined within this document are specified with the drive mounted by any of

the four methods shown in Figure 15, and in accordance with the restrictions of Section 8.4. Orientation of the

side nearest the LED may be up or down.

6.4.4.1

Shock

a. Operating—normal

The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not

exceeding 15 Gs at a maximum duration of 11 msec (half sinewave). The drive, as installed for normal

operation, shall operate error free while subjected to intermittent shock not exceeding 60 Gs at a maximum

duration of 2 msec (half sinewave). Shock may be applied in the X, Y, or Z axis.

b. Operating—abnormal

Equipment, as installed for normal operation, does not incur physical damage while subjected to intermit-

tent shock not exceeding 40 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at

abnormal levels may promote degraded operational performance during the abnormal shock period. Speci-

fied operational performance will continue when normal operating shock levels resume. Shock may be

applied in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.

c. Non-operating

The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes

both isolated drives and integrated drives.

The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum duration of 11 msec (half

sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X, Y,

or Z axis.

The drive subjected to nonrepetitive shock not exceeding 225 Gs at a maximum duration of 2 msec (half

sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,

or Z axis.

The drive subjected to nonrepetitive shock not exceeding 120 Gs at a maximum duration of 0.5 msec (half

sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,

or Z axis.

d. Packaged

Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from

heights as defined below. For additional details refer to Seagate specifications 30190-001 (under 100 lbs/45

kg) or 30191-001 (over 100 lbs/45 Kg).

Package size

Packaged/product weight

Any

Drop height

<600 cu in (<9,800 cu cm)

600-1800 cu in (9,800-19,700 cu cm)

>1800 cu in (>19,700 cu cm)

>600 cu in (>9,800 cu cm)

60 in (1524 mm)

48 in (1219 mm)

42 in (1067 mm)

36 in (914 mm)

0-20 lb (0 to 9.1 kg)

20-40 lb (9.1 to 18.1 kg)

Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for

general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or

equivalent.

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Figure 15. Recommended mounting

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6.4.4.2

Vibration

a. Operating - normal

The drive as installed for normal operation, shall comply with the complete specified performance while

subjected to continuous vibration not exceeding

5-500 Hz @ 1.0 G (zero to peak)

Vibration may be applied in the X, Y, or Z axis.

Operating normal translational random flat profile

10 - 400 Hz

0.5 GRMS

b. Operating - abnormal

The drive as installed for normal operation shall not incur physical damage while subjected to periodic

vibration not exceeding:

15 minutes of duration at major resonant frequency

5-500 Hz @ 1.5 G (X, Y, or Z axis, zero to peak)

Vibration occurring at these levels may degrade operational performance during the abnormal vibration

period. Specified operational performance will continue when normal operating vibration levels are

resumed.

Operating abnormal translational random flat profile

10 - 400 Hz

1.2 GRMS

c. Non-operating

The limits of non-operating vibration shall apply to all conditions of handling and transportation. This

includes both isolated drives and integrated drives.

The drive shall not incur physical damage or degraded performance as a result of continuous vibration not

exceeding

5-22 Hz @ 0.040 inches (1.02 mm) displacement (zero to peak)

22-500 Hz @ 3.00 G

Vibration may be applied in the X, Y, or Z axis.

Non-operating translational random flat profile

10 - 400 Hz

1.2 GRMS

6.4.5

Air cleanliness

The drive is designed to operate in a typical office environment with minimal environmental control.

6.4.6

Corrosive environment

Seagate electronic drive components pass accelerated corrosion testing equivalent to 10 years exposure to

light industrial environments containing sulfurous gases, chlorine and nitric oxide, classes G and H per ASTM

B845. However, this accelerated testing cannot duplicate every potential application environment.

Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corro-

sive chemicals as electronic drive component reliability can be affected by the installation environment. The sil-

ver, copper, nickel and gold films used in Seagate products are especially sensitive to the presence of sulfide,

chloride, and nitrate contaminants. Sulfur is found to be the most damaging. In addition, electronic components

should never be exposed to condensing water on the surface of the printed circuit board assembly (PCBA) or

exposed to an ambient relative humidity greater than 95%. Materials used in cabinet fabrication, such as vulca-

nized rubber, that can outgas corrosive compounds should be minimized or eliminated. The useful life of any

electronic equipment may be extended by replacing materials near circuitry with sulfide-free alternatives.

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6.4.7

Acoustics

Sound power during idle mode shall be 3.3 bels typical, or better, when measured to ISO 7779 specification.

There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea-

sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the

masking noise on any drive.

6.4.8

Electromagnetic susceptibility

See Section 2.1.2.

6.5

Mechanical specifications

The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions

of the front panel are shown in figure below. Refer to Figures 16 and 17 for detailed mounting configuration

dimensions. See Section 8.4, “Drive mounting.”

Height:

Width:

Depth:

Weight:

1.000 in

4.000 in

5.75 in

25.4 mm

101.6 mm

146.05 mm

0.726 kilograms

1.6 pounds

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[1]

-Z-

// T -Z-

Notes:

[1]

-X-

Mounting holes are 6-32 UNC 2B, three

on each side and four on the bottom.

Max screw penetration into side of drive

is 0.15 in. (3.81 mm). Max screw

tightening torque is 6.0 in-lb (0.678 nm)

with minimum full thread engagement of

0.12 in. (3.05 mm).

-Z-

Dimension Table

U -X-

Inches

Millimeters

1.028 max

5.787 max

4.000 +/- .010 101.60 +/- .25

3.750 +/- .010

.125 +/- .010

1.750 +/- .010

1.122 +/- .020

26.10 max

147.00 max

95.25 +/- .25

3.18 +/- .25

44.45 +/- .25

28.50 +/- .50

4.000 +/- .010 101.60 +/- .25

.250 +/- .010

1.638 +/- .010

.181 +/- .020

1.625 +/- .020

1.816 +/- .010

.315 +/- .010

.015 max

6.35 +/- .25

41.60 +/- .25

4.60 +/- .50

41.28 +/- .50

46.13 +/- .25

8.00 +/- .25

0.38 max

6.73 +/- .25

[1]

.015 max

.265 +/- .010

-X-

Figure 16. LW mounting configuration dimensions

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-Z-

// T -Z-

[1]

Notes:

[1]

Mounting holes are 6-32 UNC 2B, three

on each side and four on the bottom.

Max screw penetration into side of drive

is 0.15 in. (3.81 mm). Max screw

tightening torque is 6.0 in-lb (0.678 nm)

with minimum full thread engagement of

0.12 in. (3.05 mm).

-Z-

N -Z- -X-

Dimension Table

U -X-

Inches

Millimeters

1.028 max

5.787 max

4.000 +/- .010 101.60 +/- .25

3.750 +/- .010

.125 +/- .010

1.750 +/- .010

1.122 +/- .020

26.10 max

147.00 max

95.25 +/- .25

3.18 +/- .25

44.45 +/- .25

28.50 +/- .50

4.000 +/- .010 101.60 +/- .25

.250 +/- .010

1.638 +/- .010

.181 +/- .020

.040 max

1.625 +/- .020

2.469 +/- .020

.276 +/- .040

.015 max

6.35 +/- .25

41.60 +/- .25

4.60 +/- .50

1.20 max

41.28 +/- .50

62.71 +/- .50

7.00 +/- 1.02

0.38 max

[1]

.015 max

0.38 max

-X-

Figure 17. LC mounting configuration dimensions

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7.0

Defect and error management

The drive, as delivered, complies with this specification. The read error rate and specified storage capacity are

not dependent upon use of defect management routines by the host (initiator).

Defect and error management in the SCSI system involves the drive internal defect/error management and

SCSI systems error considerations (errors in communications between Initiator and the drive). Tools for use in

designing a defect/error management plan are briefly outlined in this section, with references to other sections

where further details are given.

7.1

Drive internal defects

During the initial drive format operation at the factory, media defects are identified, tagged as being unusable,

and their locations recorded on the drive primary defects list (referred to as the “P” list and also as the ETF

defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place

on the medium and the location listed in the defects reallocation table. The “P” list is not altered after factory

formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment

are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the

Read Defect Data command (see the SCSI Interface Product Manual).

7.2

Drive error recovery procedures

Whenever an error occurs during drive operation, the drive, if programmed to do so, performs error recovery

procedures to attempt to recover the data. The error recovery procedures used depend on the options previ-

ously set up in the error recovery parameters mode page. Error recovery and defect management may involve

the use of several SCSI commands, the details of which are described in the SCSI Interface Product Manual.

The drive implements selectable error recovery time limits such as are required in video applications. For addi-

tional information on this, refer to the Error Recovery Page table in the SCSI Interface Product Manual, which

describes the Mode Select/Mode Sense Error Recovery parameters.

The error recovery scheme supported by the drive provides a means to control the total error recovery time for

the entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent

in error recovery for a command can be limited via the Recovery Time Limit bytes in the Error Recovery Mode

Page. The total amount of time spent in error recovery for a single LBA can be limited via the Read Retry

Count or Write Retry Count bytes in the Error Recovery Mode Page.

The drive firmware error recovery algorithms consist of 11 levels for read recoveries and 5 levels for writes.

Table 3 equates the Read and Write Retry Count with the maximum possible recovery time for read and write

recovery of individual LBAs. The times given do not include time taken to perform reallocations, if reallocations

are performed. Reallocations are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the

RC bit is zero, and the Recovery Time Limit for the command has not yet been met. Time needed to perform

reallocation is not counted against the Recovery Time Limit.

The Read Continuous (RC) bit, when set to one, requests the disc drive to transfer the requested data length

without adding delays (for retries or ECC correction) that may be required to insure data integrity. The disc

drive may send erroneous data in order to maintain the continuous flow of data. The RC bit should only be

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used when data integrity is not a concern and speed is of utmost importance. If the Recovery Time Limit or

retry count is reached during error recovery, the state of the RC bit is examined. If the RC bit is set, the drive

will transfer the unrecovered data with no error indication and continue to execute the remaining command. If

the RC bit is not set, the drive will stop data transfer with the last good LBA, and report a “Check Condition,

Unrecovered Read Error.”

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Table 3:

Read and write retry count maximum recovery times [1]

Read retry

count [1]

Maximum recovery time

per LBA (cumulative, msec)

Write retry Maximum recovery time

count

per LBA (cumulative, msec)

77.7

35.9

89.7

53.8

305.0

83.7

352.8

101.7

400.7

179.4

418.6

424.6 (default)

466.4

586.0

675.7

723.5

777.3

1,064.4

1,877.7 (default)

[1] These values are subject to change.

Setting these retry counts to a value below the default setting could result in an increased unrecovered

error rate which may exceed the value given in this product manual. A setting of zero (0) will result in the

drive not performing error recovery.

For example, suppose the Read/Write Recovery page has the RC bit set to 0, read retry count set to 4,

and the recovery time limit field (Mode Sense page 01, bytes 10 and 11) set to FF FF hex (maximum). A

four LBA Read command is allowed to take up to 400.7 msec recovery time for each of the four LBAs in

the command. If the recovery time limit is set to 00 C8 hex (200 msec decimal) a four LBA read command

is allowed to take up to 200 msec for all error recovery within that command. The use of the Recovery

Time Limit field allows finer granularity on control of the time spent in error recovery. The recovery time

limit only starts counting when the drive is executing error recovery and it restarts on each command.

Therefore, each command’s total recovery time is subject to the recovery time limit. Note: A recovery time

limit of 0 will use the drive’s default value of FF FF. Minimum recovery time limit is achieved by setting the

Recovery Time Limit field to 00 01.

7.3

SCSI systems errors

Information on the reporting of operational errors or faults across the interface is given in the SCSI Interface

Product Manual. Message Protocol System is described in the SCSI Interface Product Manual. Several of the

messages are used in the SCSI systems error management system. The Request Sense command returns

information to the host about numerous kinds of errors or faults. The Receive Diagnostic Results reports the

results of diagnostic operations performed by the drive.

Status returned by the drive to the Initiator is described in the SCSI Interface Product Manual. Status reporting

plays a role in the SCSI systems error management and its use in that respect is described in sections where

the various commands are discussed.

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7.4

Background Media Scan

Background Media Scan (BGMS) is a self-initiated media scan. It performs sequential reads across the entire

pack of the media while the drive is idle. In RAID arrays, BGMS allows hot spare drives to be scanned for

defects prior to being put into service by the host system. On regualr duty drives, if the host system makes use

of the BGMS Log Page, it can avoid placing data in suspect locations on the media. Unrecovered error sites

found during BGMS will be logged and recovered error sites will be logged or reallocated per ARRE/AWRE

settings.

With BGMS, the host system can consume less power and system overhead by only checking BGMS status/

results rather than tying up the bus and consuming power in the process of host-initiated media scanning activ-

ity.

Since the background scan functions are only done during idle periods, BGMS causes a negligible impact to

system performance. Background media scan will begin after 500ms of idle time. Other features that normally

use idle time to function will function normally because BGMS functions for bursts of 800ms and then sus-

pends activity to allow other background functions to operate. Additionally, BGMS operates in segments of 400

block reads, checking for host commands upon completion of each of the block segments.

The BGMS function will complete any BGMS-initiated error recovery prior to returning to service host-initiated

commands. Overhead associated with a return to host-servicing activity from BGMS only impacts the first com-

mand that interrupted BGMS. This results in a typical delay of about 4 ms.

7.4.1

Media Pre-Scan

Media Pre-Scan is an optional feature that allows the drive to handle unrecovered media errors that would oth-

erwise have been found by the host system during critical data accesses early in the integration process at

customer sites. This should reduce integration DPPM (defective parts per million) by identifying and repairing

media errors that arose during shipping and handling. Media Pre-Scan replaces all host-initiated Write com-

mands with Write-Verify commands when the drive is accessing areas of the media yet untouched by BGMS-

initiated scanning activity.

The drive will attempt to run BGMS on the entire pack of the drive. This will result in increasingly large portion

so fthe drive having been accesed, provided there is adequate idle time to allow BGMS to run. During the Pre-

Scan period, all Write commands that are in un-BGMS-scanned areas are converted to Write-Verify com-

mands. To expedite the scan of the full pack and the subsequenty exit from the Pre-Scan period, BGMS will

begin immediately when the drive goes to idle during the Pre-Scan period, as opposed to waiting 500ms as is

done under non-Pre-Scan conditions.

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8.0

Installation

Note. These drives are designed to be used only on single-ended (SE) or low voltage differential (LVD)

busses. Do not install these drives on a high voltage differential (HVD) bus.

The first thing to do when installing a drive is to set the drive SCSI ID and set up certain operating options. This

is usually done by installing small shorting jumpers on the pins of connectors J2 and J6 on the PCBA (or J5-

Auxiliary on the LW model), or via the drive to host I/O signals on the LC model. Some users connect cables to

J6 or J5-Auxiliary and perform the set-up using remote switches.

Configure drive options

For option jumper locations and definitions refer to Figures 18, 19, and 20. Drive default mode parameters are

not normally needed for installation. Refer to Section 9.3.2 for default mode parameters if they are needed.

• Ensure that the SCSI ID of the drive is not the same as the host adapter. Most host adapters use SCSI ID 7

because ID 7 is the highest priority on both 8 and 16 bit data buses.

• If multiple devices are on the bus set the drive SCSI ID to one that is not presently used by other devices on

the bus.

• If the drive is the only device on the bus, attach it to the end of the SCSI bus cable. The user, system integra-

tor, or host equipment manufacturer must provide external terminators.

Note. For additional information about terminator requirements, refer to Sections 9.8 and 9.9.

• Set all appropriate option jumpers for desired operation prior to power on. If jumpers are changed after

power has been applied, recycle the drive power to make the new settings effective.

• Installation instructions are provided by host system documentation or with any additionally purchased drive

installation software. If necessary see Section 10 for Seagate support services telephone numbers.

• Do not remove the manufacturer’s installed labels from the drive and do not cover with additional labels, as

the manufacturer labels contain information required when servicing the product.

Formatting

Drives are shipped from the factory low level formatted with 512 byte sectors.

8.1

Drive ID/option select header

Figures 18 and 19 show views of the drive ID select jumper connectors. Figure 20 shows the option select

jumper connector for all models. Figure 18 shows the drive’s J5-auxiliary jumper connector. Both J5-auxiliary

and J6 have pins for selecting drive ID and for connecting the remote LED cable. Only one or the other should

be used, although using both at the same time would not damage the drive. The notes following the figures

describe the functions of the various jumper positions on the connectors J2, J5-Auxiliary and J6. Suggested

part number for the jumpers used on J2 is Molex 52747-0211 (Seagate part number 77679052). A bag with the

two jumper plug types is shipped with the standard OEM drives.

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Drive

Front

Pin 1

J6 [1]

1 0

(default)

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

SCSI ID = 6

SCSI ID = 7

[2]

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12

SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

Shipped with cover installed.

Do not install jumpers;

retain cover.

Reserved

[4]

Host

Alternate

Usage Plug

+5V

[6]

Ground

Drive Activity LED

[4]

Dashed area is optional host circuitry (external to the

drive) connected to host supplied optional usage plug.

Do not connect anything to pins 13-20.

[5]

Figure 18. J6 jumper header

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Drive HDA (rear view, PCB facing downward)

Pin 1

[1]

Pin 1

+5V Ground

3P 2P

J1-DC Power

68 Pin

SCSI I/O Connector

SCSI ID = 0

SCSI ID = 1

SCSI ID = 2

SCSI ID = 3

SCSI ID = 4

SCSI ID = 5

(default)

PCB

SCSI ID = 6

SCSI ID = 7

For ID selection use

jumpers as shown or

connect a cable for

remote switching as

shown below.

SCSI ID = 8

SCSI ID = 9

SCSI ID = 10

SCSI ID = 11

SCSI ID = 12

SCSI ID = 13

SCSI ID = 14

SCSI ID = 15

Pins 1, 3, 5, and 7 are

optional connections to

switching circuits in host

equipment to establish

drive ID.

Reserved

Host [4]

Alternate

N.C.

Usage Plug

Remote Switches

+5V

N.C.

Ground

Drive Activity LED

12 10 8

Pins 2, 4, 6, and 8 are

+5V

normally not grounded.

They are driven low (ground)

for 250 ms after a Reset

or PWR ON to allow drive to

read SCSI ID selected.

[4]

Dashed area is optional host circuitry (external to the

drive) connected to host supplied optional usage plug.

Figure 19. J5 jumper header (on LW models only)

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Pin 1

R R

Jumper

Positions

S D MW P E E T

E S E P D S S P

Force single-ended bus mode

Delay Motor Start

[2]

Enable Remote Motor Start

Write Protect

Parity Disable

Reserved

*Additional notes on these

functions in section 8.1.2.

(applies to LW models only;

Term. Power to SCSI Bus

reserved on LC models)

[3]

Jumper Plug

(enlarged to

show detail)

Drive

Front

Figure 20. J2 option select header (on LW models only)

8.1.1 Notes for Figures 18, 19, and 20.

[1] Notes explaining the functions of the various jumpers on jumper header connectors J2, J5, and J6 are

given here and in Section 8.1.2. The term “default” means as standard OEM units are configured with a

jumper on those positions when shipped from factory. “Off” means no jumper is installed; “On” means a

jumper is installed. OFF or ON underlined is factory default condition.

The PCBA on LC models does not have connector J5. The J5 connector signals conform to SFF-8009

Revision 2.0, Unitized Connector for Cabled Drives, signal assignments for auxiliary connectors.

[2] These signals are also on 80-pin J1 I/O connector. See tables 16 and 17, note 9.

[3] Voltage supplied by the drive.

[4] Dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage

plug.

[5] Do not connect anything to J5 pins 9, 11-12 or J6 pins 13-20.

[6] Connect an external Drive Activity LED to J6 pins 11 and 12 (see Figure 18), or to J5 pin 8 (see Figure 19)

and the drives +5V power source, through an appropriately sized current limiting resistor. The drive pro-

vides an internal 150 ohm current limiting resistor for the J6 connection.

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8.1.2

Function description

jumper

installation

Jumper function description

Off

Forces drive to use single-ended I/O drivers/receivers only.

Drive can operate on the interface in low voltage differential mode or single-ended, depend-

ing on the voltage state of the I/O “DIFFSNS” line. Default is SE jumper not installed.

Off

Spindle starts immediately after power up - Default setting.

Drive spindle does not start until Start Unit command received from host.

Spindle Startup is delayed by SCSI ID times 12 seconds after power is applied, i.e., drive 0

spindle starts immediately when DC power connected, drive 1 starts after 12 second delay,

drive 2 starts after 24 second delay, etc.

Drive spindle starts when Start Unit command received from host. Delayed start feature is

overridden and does not apply when ME jumper is installed.

Off

Entire drive is write protected.

Drive is not write protected. Default is WP jumper not installed.

Off

Parity checking and parity error reporting by the drive is disabled.

Drive checks for parity and reports result of parity checking to host.

Default is PD jumper not installed.

RES

Off

Reserved jumper position. Default is no RES jumper installed.

Off

The drive does not supply terminator power to external terminators or to the SCSI bus I/O

cable.

Drive supplies power to SCSI bus I/O cable. When drives have differential I/O circuits, a

jumper on the TP position may be needed to power external terminators (see system docu-

mentation). These drives do not have terminator circuits on the drive.

Note. J2 does not exist on LC models and is supported on LW models only.

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8.2

Drive orientation

The balanced rotary arm actuator design of the drive allows it to be mounted in any orientation. All drive perfor-

mance characterization, however, has been done with the drive in horizontal (discs level) and vertical (drive on

its side) orientations, and these are the two preferred mounting orientations.

8.3

Cooling

The host enclosure must dissipate heat from the drive. You should confirm that the host enclosure is designed

to ensure that the drive operates within the temperature measurement guidelines described in Section 6.4.1. In

some cases, forced airflow may be required to keep temperatures at or below the temperatures specified in

Section 6.4.1.

If forced air is necessary, possible air-flow patterns are shown in Figure 21. The air-flow patterns are created

by fans either forcing or drawing air as shown in the illustrations. Conduction, convection, or other forced air-

flow patterns are acceptable as long as the temperature measurement guidelines of Section 6.4.1 are met.

Above unit

Under unit

Note. Air flows in the direction shown (back to front)

or in reverse direction (front to back)

Above unit

Under unit

Note. Air flows in the direction shown or

in reverse direction (side to side)

Figure 21. Air flow (suggested)

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8.4

Drive mounting

When mounting the drive using the bottom holes (x-y plane in Figure 15) care must be taken to ensure that the

drive is not physically distorted due to a stiff non-flat mounting surface. The allowable mounting surface

stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define the allowable mounting surface

stiffness:

k * x = F < 15lb = 67N

where ‘k’ represents the mounting surface stiffness (units of lb/in or N/mm), and ‘x’ represents the out-of-plane

mounting surface distortion (units of inches or millimeters). The out-of-plane distortion (‘x’) is determined by

defining a plane with three of the four mounting points fixed and evaluating the out-of-plane deflection of the

fourth mounting point when a known force (F) is applied to the fourth point.

Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify that the drive

can meet the shock and vibration specifications given herein while mounted in such an adapter

frame. Adapter frames that are available may not have a mechanical structure capable of mounting

the drive so that it can meet the shock and vibration specifications listed in this manual.

8.5

Grounding

Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the

user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri-

cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA

ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mount-

ing the drive in the host equipment.

Increased radiated emissions may result if you do not provide the maximum surface area ground connection

between system ground and drive ground. This is the system designer’s and integrator’s responsibility.

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9.0

Interface requirements

This section partially describes the interface requirements as implemented on the drives.

9.1 General description

This section describes in essentially general terms the interface requirements supported by the Cheetah 10K.7

SCSI. No attempt is made to describe all of the minute details of conditions and constraints that must be con-

sidered by designers when designing a system in which this family of drives can properly operate. Seagate

declares that the drives operate in accordance with the appropriate ANSI Standards referenced in various

places herein, with exceptions as noted herein or in the Seagate SCSI Interface Product Manual.

9.2

SCSI interface messages supported

Table 4 lists the messages supported by the SCSI-2 and SCSI-3 modes of the Cheetah 10K.7 SCSI family

drives.

Table 4:

SCSI messages supported by Cheetah 10K.7 SCSI family drives

Message name

Message code

06h

Supported

Abort

Abort-tag

0Dh

Bus device reset

Clear ACA

0Ch

16h

Clear queue

0Eh

Command complete

Continue I/O process

Disconnect

00h

12h

04h

Extended messages

Identify

01h[1]

80h-FFh

23h

Ignore wide residue (two bytes)

Initiate recovery

0Fh

Initiator detected error

Linked command complete

Linked command complete with flag

Message parity error

Message reject

05h

0Ah

0Bh

09h

07h

Modify data pointer

No operation

[1]

08h

Parallel Protocol Request

Queue tag messages (two bytes)

ACA

24h

21h

22h

20h

Head of queue tag

Ordered queue tag

Simple queue tag

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Table 4:

SCSI messages supported by Cheetah 10K.7 SCSI family drives (Continued)

Message name

Message code

Supported

Release recovery

10h

03h

02h

[1]

Restore pointers

Save data pointer

Synchronous data transfer req.

Target transfer disable

Terminate I/O process

Wide data transfer request

13h

11h

[1]

Notes.

[1] Extended messages (see the SCSI Interface Product Manual).

[2] Supports all options except qas_req and iu_req.

9.3

SCSI interface commands supported

Table 5 following lists the SCSI interface commands that are supported by the drive.

OEM standard drives are shipped set to operate in Ultra320 mode.

Table 5:

Commands supported by Cheetah 10K.7 SCSI family drive

Command name

Command code

Supported

Change Definition

Compare

40h

39h

18h

3Ah

04h

Copy

Copy and Verify

Format Unit [1]

DPRY bit supported

DCRT bit supported

STPF bit supported

IP bit supported

DSP bit supported

IMMED bit supported

VS (vendor specific)

Inquiry

12h

Date Code page (C1h)

Device Behavior page (C3h)

Firmware Numbers page (C0h)

Implemented Operating Def page (81h)

Jumper Settings page (C2h)

Supported Vital Product Data page (00h)

Unit Serial Number page (80h)

Lock-unlock cache

Log Select

36h

4Ch

PCR bit

DU bit

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Table 5:

Commands supported by Cheetah 10K.7 SCSI family drive (Continued)

Command name

Command code

Supported

DS bit

TSD bit

ETC bit

TMC bit

LP bit

Log Sense

4Dh

Application Client Log page (0Fh)

Buffer Over-run/Under-run page (01h)

Cache Statistics page (37h)

Factory Log page (3Eh)

Last n Deferred Errors or Asynchronous Events page (0Bh)

Last n Error Events page (07h)

Non-medium Error page (06h)

Pages Supported list (00h)

Read Error Counter page (03h)

Read Reverse Error Counter page (04h)

Self-test Results page (10h)

Start-stop Cycle Counter page (0Eh)

Temperature page (0Dh)

Verify Error Counter page (05h)

Write error counter page (02h)

Mode Select (same pages as Mode Sense 1Ah)

Mode Select (10) (same pages as Mode Sense 1Ah)

Mode Sense

15h

55h

1Ah

Y [2]

Caching Parameters page (08h)

Control Mode page (0Ah)

Disconnect/Reconnect (02h)

Error Recovery page (01h)

Format page (03h)

Information Exceptions Control page (1Ch)

Notch and Partition Page (0Ch)

Port Control Page (19h)

Power Condition page (1Ah)

Rigid Disc Drive Geometry page (04h)

Unit Attention page (00h)

Verify Error Recovery page (07h)

Xor Control page (10h)

Mode Sense (10) (same pages as Mode Sense 1Ah)

Prefetch

5Ah

34h

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Table 5:

Commands supported by Cheetah 10K.7 SCSI family drive (Continued)

Command name

Command code

Supported

Read

08h

3Ch

25h

37h

B7h

28h

Read Buffer (modes 0, 2, 3, Ah and Bh supported)

Read Capacity

Read Defect Data (10)

Read Defect Data (12)

Read Extended

DPO bit supported

FUA bit supported

Read Long

3Eh

07h

1Ch

Reassign Blocks

Receive Diagnostic Results

Supported Diagnostics pages (00h)

Translate page (40h)

Release

17h

57h

A0h

03h

Release (10)

Report LUNS

Request Sense

Actual Retry Count bytes

Extended Sense

Field Pointer bytes

Reserve

16h

56h

3rd Party Reserve

Extent Reservation

Reserve (10)

3rd Party Reserve

Extent Reservation

Rezero Unit

01h

31h

30h

32h

0Bh

2Bh

1Dh

Search Data Equal

Search Data High

Search Data Low

Seek

Seek Extended

Send Diagnostics

Supported Diagnostics pages (00h)

Translate page (40h)

Set Limits

33h

1Bh

35h

00h

Start Unit/Stop Unit (spindle ceases rotating)

Synchronize Cache

Test Unit Ready

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Table 5:

Commands supported by Cheetah 10K.7 SCSI family drive (Continued)

Command name

Command code

Supported

Verify

2Fh

BYTCHK bit

Write

0Ah

2Eh

Write and Verify

DPO bit

Write Buffer (modes 0, 2, supported)

3Bh

2Ah

Firmware Download option

(modes 5, 7, Ah and Bh supported) [3]

Write Extended

DPO bit

FUA bit

Write Long

Write Same

PBdata

3Fh

41h

LBdata

XDRead

XDWrite

52h

50h

51h

XPWrite

[1] The drive can format to any even number of bytes per sector from 512 to 528.

[2] Tables 7, 8, and 9 show how individual bits are set and which are changeable by the host.

[3] WARNING: A power loss during flash programming can result in firmware corruption. This usually makes

the drive inoperable.

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Table 6 lists the Standard Inquiry command data that the drive should return to the initiator per the format given

in the SCSI Interface Product Manual, part number 75789509, Inquiry command section.

Table 6:

Cheetah 10K.7 SCSI family drive Standard Inquiry data

Bytes

0-15

Data (HEX)

00 00 [03]¹[12]²8B 00 01 3E

47 41 54 45 20 VENDOR ID

16-31

32-47

48-63

64-79

80-95

96-111

53 54 [33] [33] [30] [30] [30] [30] [37] [4C] [57] 20 20 20 20 20 PRODUCT ID

R# R# R#

00 00 00

00 43 6F

S# S# S# S#

00 00 00 00

79 72 69 67

53 65 61 67

74 73 20 72

S# S# S#

S# 00 00 00 00

0F 00

00 00 00 00 00

28 63 29 20 [Y] COPYRIGHT

20 41 6C 6C 20 NOTICE

72 76 65 64 20

112-127 [y]

[y]

[y]⁴20

128-143 72 69 67

[ ]¹03 means SCSI-3 (Ultra160) implemented.

Note. Seagate has chosen to set this bit to 03, SCSI-3 (Ultra160) implemented, rather than 04, SCSI-4

(Ultra320) implemented, due to compatibility issues with some host bus adapters. This setting will

not affect the Ultra320 functionality of the drive.

[ ]²The drive can be changed between these two configurations:

02 means response data in SCSI-2/SCSI-3 format.

12 means the drive uses the hierarchical addressing mode to assign LUNs to logical units (default is 12).

R# Four ASCII digits representing the last four digits of the product Firmware Release number. This informa-

tion is also given in the Vital Product Data page C0h, together with servo RAM and ROM release num-

bers.

S# Eight ASCII digits representing the eight digits of the product serial number.

[ ]³Bytes 18 through 26 reflect model of drive. The table above shows the hex values for Model

ST3300007LW.

Refer to the values below for the values of bytes 18 through 26 of you particular model:

ST3300007LW

ST3300007LC

ST3146707LW

ST3146707LC

ST373207LW

ST373207LC

33 33 30 30 30 30 37 4C 57

33 33 30 30 30 30 37 4C 43

33 31 34 36 37 30 37 4C 57

33 31 34 36 37 30 37 4C 43

33 37 33 32 30 37 4C 57 20

33 37 33 32 30 37 4C 43 20

[ ]⁴Copyright Year - the year the drive’s firmware code was built.

9.3.1 Inquiry Vital Product data

Instead of the standard Inquiry data shown in Table 6, the initiator can request several Vital Product Data

pages by setting the Inquiry command EVPD bit to one. The SCSI Interface Product Manual lists the Vital

Product Data pages and describes their formats. A separate Inquiry command must be sent to the drive for

each Vital Product Data page the initiator wants the drive to send back.

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9.3.2

Mode Sense data

The Mode Sense command provides a means for the drive to report its operating parameters to the initiator.

The drive maintains four sets of Mode parameters, Default values, Saved values, Current values and Change-

able values.

Default values are hard coded in the drive firmware that is stored in flash EPROM nonvolatile memory on the

drive PCBA. Default values can be changed only by downloading a complete set of new firmware into the flash

EPROM. An initiator can request and receive from the drive a list of default values and use those in a Mode

Select command to set up new current and saved values, where the values are changeable.

Saved values are stored on the disc media using a Mode Select command. Only parameter values that are

allowed to be changed can be changed by this method. See “Changeable values” defined below. Parameters

in the saved values list that are not changeable by the Mode Select command get their values from the default

values storage.

Current values are volatile values currently being used by the drive to control its operation. A Mode Select

command can be used to change these values (only those that are changeable). Originally, they are installed

from saved or default values after a power on reset, hard reset, or Bus Device Reset message.

Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values and

saved values can be changed by a Mode Select command. A “one” allows a change to a corresponding bit; a

“zero” allows no change. For example, in Table 7 refer to Mode page 01, in the row entitled “CHG”. These are

hex numbers representing the changeable values for mode page 01. Note that bytes 04, 05, 06, and 07 are not

changeable, because those fields are all zeros. If some changeable code had a hex value EF, that equates to

the binary pattern 1110 1111. If there is a zero in any bit position in the field, it means that bit is not changeable.

Bits 7, 6, 5, 3, 2, 1, and 0 are changeable, because those bits are all ones. Bit 4 is not changeable.

Though the drive always reports non-zero values in bytes 00 and 01, those particular bytes are never change-

able.

The Changeable values list can only be changed by downloading new firmware into the flash EPROM.

On standard OEM drives the Saved values are taken from the default values list and stored into the saved val-

ues storage location on the media prior to shipping.

When a drive is powered up, it takes saved values from the media and stores them to the current values stor-

age in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select

command before the drive is up to speed and is “ready.” An attempt to do so results in a “Check Condition sta-

tus being returned.

Note. Because there may be several different versions of drive control firmware in the total population of

drives in the field, the Mode Sense values given in the following tables may not exactly match those

of some drives.

The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com-

mand pages for SCSI Ultra160 implementation (see the SCSI Interface Product Manual).

Definitions:

DEF = Default value. Standard drives are shipped configured this way.

CHG= Changeable bits; indicates if current and saved values are changeable.

Note. Saved values for OEM drives are normally the same as the default values.

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Table 7:

ST3300007 Mode sense data

MODE SENSE (10 BYTE) HEADER DATA

00 ae 00 10 00 00 00 08 22 ec b2 5c 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0c ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0c ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 00 00 87 00 00 00

SAV 83 16 3b 18 00 00 00 28 00 00 03 29 02 00 00 01 01 10 00 78 40 00 00 00

DEF 83 16 3b 18 00 00 00 28 00 00 03 29 02 00 00 01 01 10 00 78 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 62 96 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

DEF 84 16 01 62 96 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0c ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0c ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

CHG 88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 15 f6

DEF 8a 0a 02 00 00 00 00 00 00 00 15 f6

CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

22 ec b2 5b 00 00 02 00

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Table 8:

ST3146707 Mode sense data

MODE SENSE (10 BYTE) HEADER DATA

00 ae 00 10 00 00 00 08 11 17 73 30 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0c ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0c ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 00 00 87 00 00 00

SAV 83 16 1d 8c 00 00 00 14 00 00 03 29 02 00 00 01 01 10 00 78 40 00 00 00

DEF 83 16 1d 8c 00 00 00 14 00 00 03 29 02 00 00 01 01 10 00 78 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 62 96 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

DEF 84 16 01 62 96 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0c ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0c ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

CHG 88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 0a a6

DEF 8a 0a 02 00 00 00 00 00 00 00 0a a6

CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

11 17 73 2f 00 00 02 00

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Table 9:

ST373207 Mode sense data

MODE SENSE (10 BYTE) HEADER DATA

00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02 00

MODE SENSE PAGES DATA

SAV 81 0a c0 0c ff 00 00 00 05 00 ff ff

DEF 81 0a c0 0c ff 00 00 00 05 00 ff ff

CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff

SAV 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

DEF 82 0e 80 80 00 0a 00 00 00 00 00 00 00 00 00 00

CHG 82 0e ff ff 00 00 00 00 00 00 00 00 87 00 00 00

SAV 83 16 0e c6 00 00 00 0a 00 00 03 29 02 00 00 01 01 74 00 78 40 00 00 00

DEF 83 16 0e c6 00 00 00 0a 00 00 03 29 02 00 00 01 01 74 00 78 40 00 00 00

CHG 83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 84 16 01 62 96 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

DEF 84 16 01 62 96 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00

CHG 84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

SAV 87 0a 00 0c ff 00 00 00 00 00 ff ff

DEF 87 0a 00 0c ff 00 00 00 00 00 ff ff

CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff

SAV 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 00 20 00 00 00 00 00 00

CHG 88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00

SAV 8a 0a 02 00 00 00 00 00 00 00 05 7d

DEF 8a 0a 02 00 00 00 00 00 00 00 05 7d

CHG 8a 0a 03 f1 00 00 00 00 00 00 00 00

SAV 19 06 01 00 ff ff 00 00

DEF 19 06 01 00 ff ff 00 00

CHG 19 06 00 00 ff ff 00 00

SAV 9a 0a 00 02 00 00 00 05 00 00 00 04

DEF 9a 0a 00 02 00 00 00 05 00 00 00 04

CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00

SAV 9c 0a 10 00 00 00 00 00 00 00 00 01

DEF 9c 0a 10 00 00 00 00 00 00 00 00 01

CHG 9c 0a 9d 0f ff ff ff ff ff ff ff ff

SAV 80 06 00 00 0f 00 00 00

DEF 80 06 00 00 0f 00 00 00

CHG 80 06 f7 40 0f 00 00 00

READ CAPACITY DATA

08 8b b9 97 00 00 02 00

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9.4

SCSI bus conditions and miscellaneous features supported

Asynchronous SCSI bus conditions supported by the drive are listed below. These conditions cause the SCSI

device to perform certain actions and can alter the SCSI bus phase sequence. Other miscellaneous operating

features supported are also listed here. Refer to the SCSI Interface Product Manual for details.

Table 10:

SCSI bus conditions and other miscellaneous features

Condition/feature supported by:

SCSI-2/SCSI-3

Conditions or feature

Adaptive Caching

Arbitrating System

Asynchronous Data Transfer

Asynchronous Event Notification

Attention Condition

Auto Contingent Allegiance Condition

Contingent Allegiance Condition

Deferred Error Handling

Disconnect/Reconnect

High voltage differential (HVD) interface available

Low voltage differential (LVD) interface available

Parameter Rounding (controlled by the Round bit in Mode Select page 0)

Queue tagging (up to 64 Queue tags supported)

Reporting actual retry count in Extended Sense bytes 15, 16 and 17.

Reset Condition

Segmented Caching

Synchronous Data Transfer

Zero Latency Read

SCSI-2/SCSI-3

Status supported

Good

Check Condition

Condition Met/Good

Busy

Intermediate/Good

Intermediate/Condition Met/Good

Reservation Conflict

Queue Full

ACA Active

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9.5

Synchronous data transfer

The data transfer period to be used by the drive and the initiator is established by an exchange of messages

during the Message Phase of operation. See the section on message protocol in the SCSI Interface Product

Manual, part number 75789509.

9.5.1

Synchronous data transfer periods supported

In the following tables, M is the synchronous period value (in the transfer rate negotiation message) that repre-

sents the associated transfer period and transfer rate values.

Table 11 lists the synchronous data transfer periods supported by the drive in DT DATA phase. DT DATA phase

is only allowed when using the LVD interface.

Table 11:

Synchronous DT DATA transfer periods

Transfer period

(nanoseconds)

Transfer rate

(megatransfers/second)

Transfer rate

(Mbytes/second) on wide bus

M (decimal)

6.25

12.5

160.0

80.0

40.0

20.0

10.0

320.0

160.0

80.0

40.0

100

20.0

Table 12 lists the synchronous data transfer periods supported by the drive in ST DATA phase. ST DATA phase

is allowed with either LVD or SE interface except as noted.

Table 12:

Synchronous ST DATA transfer periods

Transfer period

(nanoseconds)

Transfer rate

(megatransfers/second)

M (decimal)

40.0¹

20.0

10.0

5.0

100

200

1. This transfer rate is only allowed when using the LVD interface.

9.5.2 REQ/ACK offset

Cheetah 10K.7 SCSI family drives support REQ/ACK offset values from 7 to 63 (3Fh). Offsets of 1 through 6

are negotiated to 0 (asynchronous transfer).

9.6

Physical interface

This section describes the connectors, cables, signals, terminators and bus timing of the DC and SCSI I/O

interface. See Section 9.8 and Section 9.9 for additional terminator information.

Figures 22 and 23 show the locations of the DC power connector, SCSI interface connector, drive select head-

ers, and option select headers.

Details of the physical, electrical and logical characteristics are given in sections following, while the SCSI

operational aspects of Seagate drive interfaces are given in the SCSI Interface Product Manual.

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9.6.1

DC cable and connector

LW model drives receive DC power through a 4-pin connector (see Figure 24 for pin assignment) mounted at

the rear of the main PCBA. Recommended part numbers of the mating connector are listed below, but equiva-

lent parts may be used.

Type of cable

Connector

Contacts (20-14 AWG)

AMP 60619-4 (Loose Piece)

AMP 61117-4 (Strip)

14 AWG

MP 1-480424-0

LC model drives receive power through the 80-pin I/O connector. See Tables 16 and 17.

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Power

+12V

+12V ret

+ 5V ret

+ 5V

Pin 1

Pin 1A

J1-DC Power

4P 3P 2P 1P

PCB

J1-DC Power

Pin 1A

Pin 1P

Pin 1

68 Pin

SCSI I/O

Connector

Figure 22. LW model drive physical interface (68-pin J1 SCSI I/O connector)

Figure 23. LC model drive physical interface (80-pin J1 SCSI I/O connector)

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9.6.2

SCSI interface physical description

Cheetah 10K.7 SCSI drives support the physical interface requirements of the Ultra320 SCSI Parallel Inter-

face-4 (SPI-4), and operate compatibly at the interface with devices that support earlier SCSI-2 and SCSI-3

standards. It should be noted that this is only true if the systems engineering has been correctly done, and if

earlier SCSI-2 and SCSI-3 devices respond in an acceptable manner (per applicable SCSI Standards) to reject

newer Ultra320 protocol extensions that they don’t support.

The drives documented in this manual support single-ended and low voltage differential physical interconnects

(hereafter referred to as SE and LVD, respectively) as described in the corresponding ANSI SPI document ref-

erenced in the preceeding paragraph. These drives implement driver and receiver circuits that can operate

either SE or LVD. However, they cannot switch dynamically between SE and LVD operation.

The drives typically operate on a bus with other SCSI devices. All devices on the bus must operate in the same

mode, either SE or LVD, but not a mixture of these. All signals on the bus are common between all devices on

the bus. This bus must be terminated at both ends with the proper impedance in order to operate correctly. Do

not terminate intermediate SCSI devices. In some cases, the SCSI devices at each end have onboard termina-

tion circuits that can be enabled by installation of a jumper plug (TE) on the device. These termination circuits

receive power from either a source internal to the device, or from a line in the interface cable specifically pow-

ered for that purpose. LC and LW model drives do not have onboard termination circuits. Some type of external

termination circuits must be provided for these drives by the end user or designers of the equipment into which

the drives will be integrated. See the ANSI T10 Standard referenced above for the maximum number of

devices that can successfully operate at various interface transfer rates on SE and LVD buses.

LC model drives plug into PCBA or bulkhead connectors in the host. They may be connected in a daisy chain

by the host backplane wiring or PCBA circuit runs that have adequate DC current carrying capacity to support

the number of drives plugged into the PCBA or bulkhead connectors. A single 80-pin I/O connector cable can-

not support the DC current needs of several drives, so no cables beyond the bulkhead connectors should be

used. A single drive connected via a cable to a host 80-pin I/O connector is not recommended.

Table 13 shows the interface transfer rates supported by the various drive models defined in this manual.

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Table 13:

Interface transfer rates supported

Maximum transfer rate

Interface type/

drive models

Fast-20

(Ultra)

Fast-40

(Ultra2)

Fast-80

(Ultra160)

Fast-160

(Ultra320)

Fast-5

Fast-10

Asynchronous

yes

ST3300007LW/LC

ST3146707LW/LC

ST373207LW/LC

LVD

yes

ST3300007LW/LC

ST3146707LW/LC

ST373207LW/LC

9.6.3

SCSI interface cable requirements

The characteristics of cables used to connect parallel interface drives are discussed in the ANSI standards ref-

erenced in this section.

9.6.3.1

Cable requirements

The characteristics of cables used to connect Ultra320 SCSI parallel interface devices are discussed in detail

in Section 6 of ANSI Standard T10/1365D Rev. 3. The cable characteristics that must be considered when

interconnecting the drives described in this manual in a Ultra320 SCSI parallel, daisy-chain interconnected

system are:

• characteristic impedance (see T10/1365D Sections 6.3.3 and 6.3.4)

• propagation delay (see T10/1365D Sections 6.3.6 and 6.3.7)

• stub length (see T10/1365D Section 6.9)

• device spacing (see T10/1365D Section 6.9)

To minimize discontinuances and signal reflections, cables of different impedances should not be used in the

same bus. Implementations may require trade-offs in shielding effectiveness, cable length, number of loads

and spacing, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded

cables are mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered.

Proper impedance matching is especially important in order to maintain adequate margin at FAST-20, FAST-

40, FAST-80, and FAST-160 SCSI transfer rates.

Note. For LVD operation, twisted pair cables are recommended. For LVD Fast-40 operation, twisted pair

cables are strongly recommended. For Fast-80 and Fast-160 operation, twisted pair cables are

required.

LC Models

The 80-pin connector option provided on LC models is intended for use on drives that plug directly into back-

plane connector in the host equipment. In such installations, all backplane wiring segments are subject to the

electromagnetic concepts presented in Standard T10/1365D, Rev. 3, Section 6. For LC model drives, installa-

tions with connectors on cables are not recommended.

9.6.4

Mating connectors

Part numbers for the different type connectors that mate with the various Cheetah 10K.7 SCSI I/O connectors

are given in the sections following.

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9.6.4.1

Mating connectors for LW model drives

The nonshielded cable connector shall be a 68 conductor connector consisting of two rows of 34 male contacts

with adjacent contacts 0.050 inch (1.27 mm) apart.

Recommended mating flat cable connector part numbers are:

Amp Model 786096-7

Amp Model 786090-7

Amp Model 749925-5

Female, 68-pin, panel mount

Female, 68-pin, cable mount

(50 mil conductor centers, 28 or 30 AWG wire)

Use two, 34 conductor, 50 mil center flat cable with this connector.

This type connector can only be used on cable ends. [1]

Amp Model 88-5870-294-5 W/O Strain Relief (25 mil conductor centers, 30 AWG wire).

Use either on cable ends or in cable middle section for daisy-chain

installations [1].

Amp Model 1-480420-0

Berg 69307-012

Power connector 4 circuit housing

12-position, 2 x 6, 2 mm receptacle housing

[1] See Figure 24.

The drive device connector is a nonshielded 68-conductor connector consisting of two rows of 34 female pins

with adjacent pins 50 mils apart. The connector is keyed by means of its shape (see Figure 25).

9.6.4.2

Mating connectors for LC model drives

The nonshielded connector shall be an 80-conductor connector consisting of two rows of 40 contacts with adja-

cent contacts 50 (1.27 mm) mils apart (see Figure 26). I/O connection using a cable is not recommended. The

length and size of the host equipment DC power carrying conductors from the DC power source to the host

equipment 80-pin disc drive interface connector(s) should be strictly designed according to proper power trans-

mission design concepts. No possibility for the equipment user to attach an 80-pin cable/connector should be

allowed, since the length of the DC power carrying conductors could not be controlled and therefore could

become too long for safe power transmission to the drive. Multiconnector 80-conductor cables should espe-

cially not be allowed, since the power-carrying conductors on the 80-conductor interface were not intended to

support a series of drives.

To insure that both drive connector and host equipment mating connector mate properly, both drive connector

and host equipment mating connector must meet the provisions of “SFF-8451 Specification for SCA-2

Unshielded Connections.” To obtain this specification, visit the following web site: www.sffcommittee.org

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Recommended mating 80-position PCBA mount connectors:

Straight-in connector Hot plug version (with ground guide-pin)

Seagate P/N:

Amp US P/N:

77678703

2-557103-1

94-0680-02-1

2-557103-2

94-0680-02-2

787311-1

787311-2

with polarization

without polarization

Amp Japan P/N: 5-175475-9

Right-angle to PCBA connectors

Seagate P/N:

Amp US P/N:

Amp Japan P/N:

77678559

2-557101-1

5-175474-9

For additional information call Amp FAX service at 1-800-522-6752.

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LW/LWV

Model

Terminator

[7]

[6]

2 through X

SCSI devices [4]

SCSI ID 7 [5]

[2]

Pin 1

SCSI ID 1

(check your

adapter for Pin 1 location)

[1]

Host

Adapter

PCB

SCSI ID 0

[3]

[2]

[1] Closed end type 68-pin connector used. Terminators enabled.

[2] Open end type (in-line application) connector used.

[3] Host need not be on the end of the bus. Another device can be on the end with the terminator, the host

having no terminator.

[4] Total interface cable length must not exceed that specified in ANSI document T10/1302D (including host

adapter/initiator). The cable length restriction limits the total number of devices allowed.

[5] SCSI ID7 has highest arbitration priority, then ID15 to ID8 (ID 8 has the very lowest priority).

[6] Last drive on the bus.

[7] Open-end type 68-pin connector used. If end device, use external terminator and closed-end type 68-pin

connector.

Figure 24. SCSI daisy chain interface cabling for LW drives

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3.650–.005

.346

.270

.15 5

1.650

.3937

.0787

.020

.600

.200

.050

.022

.047

.60

(15.24)

.519

.20

typ

(13.18)

(5.08)

.100

(2.54)

Pos.

1.816

(46.13)

.315

(8.00)

.085

(2.16)

Pos.

Position 1

Pos. 35

x 45¡ chamfer

typ

.315 – .010

(8.00)

.050

(1.27)

+.001

.218

(5.54)

.840 – .005

(21.34)

dia

.083

(2.1)

—.002

1.650

(41.91)

.0787

(2.00)

Pos.

Trifurcated Pins

(4 places)

Pos. 68

.980

(24.89)

1.368

(34.74)

.767

(19.48)

3.650

(92.71)

Figure 25. Nonshielded 68-pin SCSI device connector used on LW drives

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7.00

(.276)

12.70

(.500)

End View

Grounding

Pins

2.15–0.10

2 places

57.87

(2.278) —0.15

+ .000

— .006

[

M Y M

0.15

of Datum Y

—Y—

Front View

Pin 1

62.15 – 0.15

(2.447) (– .005)

M Y M

0.15

Housing

Insert mating

I/O connector

Top View

1.27

(.05)

Contact

0.50

Typ

Grounding

Pins

(.020)

0.3

of Datum Y

M Y M

(.012)

Pin 1

Pin 40

Back View

Pin 41

Pin 80

Figure 26. Nonshielded 80-pin SCSI “SCA-2” connector, used on LC drives

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Table 14:

LW 68-conductor single-ended (SE) P cable signal/pin assignments [11]

Note. Note: A minus sign preceding a signal name indicates that signal is active low.

Signal

name [1]

Connector contact

number [3]

Cable conductor

number [2]

Connector

contact number [3]

Signal

name [1]

GND

TermPwr

Reserved

GND

–DB12

–DB13

–DB14

–DB15

–DBP1

–DB0

–DB1

–DB2

–DB3

–DB4

–DB5

–DB6

–DB7

–DBP

GND

TermPwr

Reserved

GND

–ATN

GND

–BSY

–ACK

–RST

–MSG

–SEL

–C/D

–REQ

–I/O

–DB8

–DB9

–DB10

–DB11

Notes [ ]: See page following Table 17.

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Table 15:

LW 68-conductor LVD P cable signal/pin assignments [11]

Note. Note: A minus sign preceding a signal name indicates that signal is active low.

Connector contact

number [3]

Cable conductor

number [2]

Connector contact

number [3]

Signal name [1]

+DB12

+DB13

+DB14

+DB15

+DBP1

+DB0

Signal name [1]

–DB12

–DB13

–DB14

–DB15

–DBP1

–DB0

+DB1

–DB1

+DB2

–DB2

+DB3

–DB3

+DB4

–DB4

+DB5

–DB5

+DB6

–DB6

+DB7

–DB7

+DBP

–DBP

Ground

DIFFSNS [8]

TermPwr

Reserved

Ground

+ATN

Ground

TermPwr

Reserved

Ground

–ATN

Ground

+BSY

Ground

–BSY

+ACK

–ACK

+RST

–RST

+MSG

+SEL

–MSG

–SEL

+C/D

–C/D

+REQ

–REQ

–I/O

+I/O

+DB8

–DB8

+DB9

–DB9

+DB10

+DB11

–DB10

–DB11

Notes [ ]: See page following Table 17.

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Table 16:

LC 80-pin single-ended (SE) I/O connector pin assignments [11]

Note. A minus sign preceding a signal name indicates that signal is active low.

Connector contact

Signal name [1]

12 V CHARGE

12 V

number [3]

Signal number [3]

Contact name[1]

12 V GND

MATED 1 [12]

NC [10]

DIFFSNS [8]

GND

12 V

NC [10]

–DB11

–DB10

–DB9

GND

–DB8

GND

–I/O

GND

–REQ

–C/D

GND

–SEL

GND

–MSG

–RST

–ACK

–BSY

–ATN

GND

–DBP

–DB7

GND

–DB6

GND

–DB5

GND

–DB4

GND

–DB3

GND

–DB2

GND

–DB1

GND

–DB0

GND

–DP1

GND

–DB15

–DB14

–DB13

–DB12

+5 V

GND

MATED 2

5 V GND

+5 V

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Table 16:

LC 80-pin single-ended (SE) I/O connector pin assignments [11] (Continued)

Note. A minus sign preceding a signal name indicates that signal is active low.

Connector contact

Signal name [1]

number [3]

Signal number [3]

Contact name[1]

NC [10]

ACTIVE LED OUT [4] [9]

DLYD-START [6] [9] [12]

SCSI ID (1) [7] [9] [12]

SCSI ID (3) [7] [9] [12]

RMT-START [5] [9] [12]

SCSI ID (0) [7] [9] [12]

SCSI ID (2) [7] [9] [12]

Notes [ ]: See page following Table 17.

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Table 17:

LC 80-pin single-ended (LVD) I/O connector pin assignments [11]

Note. A minus sign preceding a signal name indicates that signal is active low.

Connector contact

Signal name [1]

12 V CHARGE

12 V

number [3]

Signal number [3]

Contact name[1]

12 V GND

MATED 1 [12]

NC [10]

DIFFSNS [8]

+DB11

+DB10

+DB9

12 V

NC [10]

–DB11

–DB10

–DB9

–DB8

+DB8

–I/O

+I/O

–REQ

–C/D

+REQ

+C/D

–SEL

+SEL

–MSG

–RST

+MSG

+RST

–ACK

+ACK

–BSY

+BSY

–ATN

+ATN

–DBP

+DBP0

+DB7

–DB7

–DB6

+DB6

–DB5

+DB5

–DB4

+DB4

–DB3

+DB3

–DB2

+DB2

–DB1

+DB1

–DB0

+DB0

–DBP1

–DB15

–DB14

–DB13

–DB12

+5 V

+DP1

+DB15

+DB14

+DB13

+DB12

MATED 2

5 V GND

+5 V

+5 V CHARGE

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Table 17:

LC 80-pin single-ended (LVD) I/O connector pin assignments [11] (Continued)

Note. A minus sign preceding a signal name indicates that signal is active low.

Connector contact

Signal name [1]

number [3]

Signal number [3]

Contact name[1]

NC [10]

ACTIVE LED OUT [4] [9]

DLYD_START [6] [9] [12]

SCSI ID (1) [7] [9] [12]

SCSI ID (3) [7] [9] [12]

RMT_START [5] [9] [12]

SCSI ID (0) [7] [9] [12]

SCSI ID (2) [7] [9] [12]

Notes [ ]: See page following this table.

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Notes [ ] for Tables 14 through 17.

[1] See Section 9.6.4.1 for detailed electrical characteristics of these signals.

[2] The conductor number refers to the conductor position when using 0.025-inch (0.635 mm) centerline flat

ribbon cable. Other cables types may be used to implement equivalent contact assignments.

[3] Connector contacts are on 0.050 inch (1.27 mm) centers.

[4] Front panel LED signal; indicates drive activity for host front panel hard drive activity indicator.

[5] Asserted by host to enable Motor Start option (enables starting motor via SCSI bus command).

[6] Asserted by host to enable Delayed Motor Start option (motor starts at power on or after a delay of 12 sec-

onds times drive ID). This and [3] above are mutually exclusive options.

[7] Binary code on A3, A2, A1 and A0 asserted by host to set up SCSI bus ID in drive.

[8] GND provides a means for differential devices to detect the presence of a single ended device on the bus.

Drive will not operate I/O bus at Ultra2 or faster SCSI data rates if this is grounded.

[9] Signals [4] through [7] are used in place of installing jumpers and cables on option select connectors J2

and J6. See Section 8.1.1 notes.

[10] “NC” means no connection.

[11] 8 bit devices which are connected to the 16 data bit LVD I/O shall leave the following signals open: –DB8,

–DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

8 bit devices which are connected to the 16 data bit single-ended (SE) I/O shall have the following signals

open: DB8, –DB9, –DB10, –DB11, –DB12, –DB13, –DB14, –DB15, and –DBP1.

All other signals should be connected as shown.

[12] Pins 38, 39, 40, 44, 78, 79, and 80 are option select pins and are tied high by the drive circuitry. The pre-

ferred electrical connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded

for the ‘0’ setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V

through a pull-up resistor (recommended size of 10K ohm), or grounded through some other means.

9.7

Electrical description

Cheetah 10K.7 SCSI drives are multimode devices. That is, their I/O circuits can operate as either single-

ended or low voltage differential drivers/receivers (selectable using the I/O “DIFFSENS” line).

See ANSI Standard T10/1302D for detailed electrical specifications.

9.7.1

Multimode—SE and LVD alternatives

When the interface “DIFFSNS” line is between -0.35 V and +0.5 V, the drive interface circuits operate single-

ended and up to and including 20 M transfers/s (Fast-20 or Ultra SCSI). When “DIFFSNS” is between +0.7 V

and +1.9 V, the drive interface circuits operate low voltage differential and up to and including 160 M

transfers/s (Fast-160 or U320 SCSI).

This multimode design does not allow dynamically changing transmission modes. Drives must operate only in

the mode for which the installation and interface cabling is designed. Multimode I/O circuits used by these

drives do not operate at high voltage differential levels and should never be exposed to high voltage differential

environments unless the common mode voltages in the environment are controlled to safe levels for single-

ended and low voltage differential devices (see ANSI SPI-4 specification T10/1365D).

LC and LW model drives do not have onboard terminators. Termination of the I/O lines must be provided for by

the Host equipment designers or end users.

LVD output characteristics

Each differential signal driven by LVD interface drivers shall have the following output characteristics when

measured at the disc drive connector:

Steady state Low level output differential voltage = 0.320 V = < |V_s| = < 0.800 V (signal negation/logic 0)

Steady state High level output differential voltage = 0.320 V = < |V_s| = < 0.800 V (signal assertion/logic 1)

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LVD input characteristics

Each differential signal received by LVD interface receiver circuits shall have the following input characteristics

when measured at the disc drive connector:

Steady state Low level input differential voltage = 0.030 V = < V_in= < 3.6 V (signal negation/logic 0)

Steady state High level input differential voltage = –3.6 V = < V_in= < –0.030 V (signal assertion/logic 1)

Differential voltage = +0.030 V minimum with common-mode voltage range 0.845 V = < V_cm= < 1.655 V.

(T10/1302D revision 14, section A.3.2).

VCCA

VCCB

LVD Signal Drivers

Single

Ended

Circuitry

Single

Ended

Negation

Driver

Receiver

LVD

Receiver

Single

Ended

Ground

Driver

Single

Ended

Assertion

Driver

LVD Signal Drivers

Ground

Single Ended:

LVD:

GND

+Signal

—Signal

Figure 27. Typical SE-LVD alternative transmitter receiver circuits

9.7.1.1 General cable characteristics

To minimize discontinuities and signal reflections, cables of different impedances should not be used in the

same bus. Implementations may require trade-offs in shielding effectiveness, cable length, the number of

loads, transfer rates, and cost to achieve satisfactory system operation. If shielded and unshielded cables are

mixed within the same SCSI bus, the effect of impedance mismatch must be carefully considered. Proper

impedance matching is especially important in order to maintain adequate margin at fast SCSI transfer rates.

9.7.1.2

Single-ended drivers/receivers

The maximum total cable length allowed with drives using single-ended I/O driver and receiver circuits

depends on several factors. Table 18 lists the maximum lengths allowed for different configurations of drive

usage. These values are from the SPI documents. All device I/O lines must have equal to or less than 25 pf

capacitance to ground, measured at the beginning of the stub.

Table 18:

Cable characteristics for single-ended circuits

maximum length

Maximum number of between SCSI S.E.

Transmission line impedance

I/O transfer rate

devices on the bus

16 (wide SCSI bus)

4 (wide SCSI bus)

8 (wide SCSI bus)

terminators

REQ/ACK

Other signals

90 + 10 Ohms

<10M transfers/s (Fast 10)

<20M transfers/s (Fast 20)

3 meters (9.8 ft)

1.5 meters (4.9 ft)

90 + 6 Ohms

A stub length of no more than 0.1 meter (0.33 ft) is allowed off the mainline interconnection with any connected

equipment. The stub length is measured from the transceiver to the connection to the mainline SCSI bus.

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Single-ended I/O cable pin assignments for LW drives are shown in Table 15.

Single-ended I/O pin assignments for LC models are shown in Table 16. The LC model does not require an I/O

cable. It is designed to connect directly to a back panel connector.

9.7.1.3

Cables for low voltage differential drivers/receivers

The SPI-3 and SPI-4 specification for differential impedance for LVD cables is 122.5 ± 12.5 ohms.

The maximum SCSI bus length between the terminators for a SCSI LVD point-to-point system (one initiator

and one target) is 25 meters (82 feet).

The maximum SCSI bus length between the terminators for a SCSI LVD multidrop system (up to 16 total SCSI

devices) is 12 meters (39.37 feet). However, implementation of this 12-meter total length is dependent on the

configuration of the system and the choice of cable. See Tables 19 and 20 for examples of recommended

SCSI LVD cable types and lengths.

It should be noted from the data in Tables 19 and 20 that shielded round twisted-pair cables can be used to

implement a 12-meter system, while Twist-n-flat cables cannot be used to implement a 12-meter system due to

higher levels of attenuation and crosstalk. In addition, twist-n-flat cables with shorter sections of twist allow

greater crosstalk and their lengths must be reduced as shown in Table 20.

Table 19:

Example shielded round twisted-pair cables - into a multi-drive backplane

Single-

Differential ended

impedance, impedance,

Single-

ended

capacitance, delay,

Conductor

resistance,

nominal

Time

Maximum shielded round

twisted-pair cable length

for U160/U320

Cable

description nominal

nominal

maximum

nominal

30 AWG

solid

130 ohms

123 ohms

132 ohms

90 ohms

17 pF/ft

1.36 ns/ft 0.113 ohms/ft 12 meters minus the SCSI

trace length of the backplane

28 AWG

stranded

80 ohms

85 ohms

19 pF/ft

20 pF/ft

1.54 ns/ft 0.067 ohms/ft 12 meters minus the SCSI

trace length of the backplane

28 AWG

stranded

1.50 ns/ft 0.065 ohms/ft 12 meters minus the SCSI

trace length of the backplane

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Table 20:

Example Twist-n-flat cables - into a multi-drive backplane

Maximum twist-n-flat

cable length

Single-

Differential ended

Single-

ended

Conductor

Time

Cable

impedance, impedance, capacitance, delay,

resistance, U320

U160

description

nominal

maximum

nominal nominal

transfer rate transfer rate

TPE, 22.25” twist, 131 ohms

1.75” flat, (24” flat

93 ohms

15.3 pF/ft

1.45 ns/ft 0.105

ohms/ft

3.05 meters

(10.0 ft)

6.1 meters

(20.0 ft)

to flat), 30 AWG

solid tinned copper

TPE, 8.1” twist,

131 ohms

93 ohms

15.3 pF/ft

1.45 ns/ft 0.105

ohms/ft

2.45 meters

(8.33 ft)

4.9 meters

(16.66 ft)

1.75” flat, (9.85” flat

to flat), 30 AWG

solid tinned copper

TPE, 4.25” twist,

1.75” flat, (6” flat to

flat), 30 AWG solid

tinned copper

1.45 ns/ft 0.105

ohms/ft

1.52 meters

(5.0 ft)

3.04 meters

(10.0 ft)

9.8

Terminator requirements

Caution: These drives do not have onboard internal terminators. The user, systems integrator or host equip-

ment manufacturer must provide a terminator arrangement external to the drive when termination is

required. For LW drives, terminator modules can be purchased that plug between the SCSI I/O

cable and the drive I/O connector or on the end of a short I/O cable stub extending past the last

cable connector. LC drives are designed to be plugged into a backpanel connector without cabling.

9.9

Terminator power

LW drives

You can configure terminator power from the drive to the SCSI bus or have the host adaptor or other device

supply terminator power to the external terminator. See Section 8.1 for illustrations that show how to place

jumpers for this configuration.

LC drives

These drives cannot furnish terminator power because no conductors in the 80-pin I/O connector are devoted

to terminator power.

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9.10

Disc drive SCSI timing

Table 21:

Disc drive SCSI timing

These values are not current Cheetah 10K.7 SCSI values, but are listed for information only.

Waveform

symbol [1]

Waveform

table [1]

Description

Typical timing

<1 µs

Target Select Time (no Arbitration)

Target Select Time (with Arbitration)

Target Select to Command

Target Select to MSG Out

Identify MSG to Command

Command to Status

T00

T01

T02

T03

T04

T05

T06

T07

T08

T09

T10

T11

N/A

4.5-1,2

4.5-1

1.93 µs

3.77 µs

4.5-2

1.57 µs

4.5-3

3.36 µs

4.5-5

Command Dependent

0.52 µs

Command to Data (para. In)

Command to Data (para. Out)

Command to Data (Write to Data Buffer)

Command to Disconnect MSG

Disconnect MSG to Bus Free

4.5-9

4.5-10

4.5-6

4.5-6,14

4.5-6

Disconnect to Arbitration (for Reselect)

Command Dependent

This measures disconnected CMD overhead

Target win Arbitration (for Reselect)

Arbitration to Reselect

T12

T13

T14

T15

T16

T17

T18

T19

T20

T21

T22

4.5-7

3.00 µs

4.5-7

1.60 µs

Reselect to Identify MSG In

4.5-7

1.39 µs

Reselect Identify MSG to Status

Reselect Identify MSG to Data (media)

Data to Status

4.5-8

Command Dependent

0.98 µs

4.5-11

4.5-15

4.5-5,8,15

4.5-14

4.5-4

Status to Command Complete MSG

Command Complete MSG to Bus Free

Data to Save Data Pointer MSG

Save Data Pointer MSG to Disconnect MSG

Command Byte Transfer

0.51 µs

4.00 µs

0.79 µs

0.04 µs

Next Command Byte Access:

4.5-4

Next CDB Byte Access (Byte 2 of 6)

Next CDB Byte Access (Byte 3 of 6)

Next CDB Byte Access (Byte 4 of 6)

Next CDB Byte Access (Byte 5 of 6)

Next CDB Byte Access (Byte 6 of 6)

Next CDB Byte Access (Byte 2 of 10)

Next CDB Byte Access (Byte 3 of 10)

Next CDB Byte Access (Byte 4 of 10)

Next CDB Byte Access (Byte 5 of 10)

Next CDB Byte Access (Byte 6 of 10)

Next CDB Byte Access (Byte 7 of 10)

T23.6.2

T23.6.3

T23.6.4

T23.6.5

T23.6.6

T23.10.2

T23.10.3

T23.10.4

T23.10.5

T23.10.6

T23.10.7

4.5-4

0.58 µs

4.5-4

0.12 µs

4.5-4

0.12 µs

4.5-4

0.12 µs

4.5-4

0.12 µs

4.5-4

0.59 µs

4.5-4

0.11 µs ±1 µs

0.12 µs ±1 µs

0.11 µs ±1 µs

0.13 µs ±1 µs

4.5-4

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Table 21:

Disc drive SCSI timing (Continued)

These values are not current Cheetah 10K.7 SCSI values, but are listed for information only.

Waveform

symbol [1]

Waveform

table [1]

Description

Typical timing

0.12 µs ±1 µs

0.04 µs

Next CDB Byte Access (Byte 8 of 10)

Next CDB Byte Access (Byte 9 of 10)

Next CDB Byte Access (Byte 10 of 10)

Data In Byte Transfer (parameter)

Data Out Byte Transfer (parameter)

Next Data In Byte Access (parameter)

Next Data Out Byte Access (parameter)

Data In Byte Transfer (media) [2]

Data Out Byte Transfer (media) [2]

Next Data In Byte access (media [2]

Next Data Out Byte access (media [2]

MSG IN Byte Transfer

T23.10.8

T23.10.9

T23.10.10

T24

4.5-4

4.5-12

4.5-13

4.5-12

4.5-13

4.5-12

4.5-13

4.5-12

4.5-13

4.5-5,7,8,14,15

4.5-2

T25

0.04 µs

T26

0.12 µs

T27

0.12 µs

T28

0.04 µs

T29

0.04 µs

T30

0.12 µs

T31

0.12 µs

T32

0.04 µs

MSG OUT Byte Transfer

T33

0.04 µs

STATUS Byte Transfer

T34

4.5-5,8,15

0.04 µs

Synchronous Data Transfer Characteristics:

Request Signal Transfer Period [3]

–

various (800 ns max)

Notes.

[1] See the Timing examples section of the SCSI Interface Product Manual.

[2] Maximum SCSI asynchronous interface transfer rate is given in Section 4.2.3 of this manual.

[3] Synchronous Transfer Period is determined by negotiations between an Initiator and a drive. The drive is

capable of setting periods as given in Section 9.5. See also the Synchronous data transfer section and the

Extended messages section of the SCSI Interface Product Manual for a description of synchronous data

transfer operation.

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9.11

Drive activity LED

The following table provides drive activity LED status.

Table 22:

Drive activity LED status

Spindle status

Command status

LED status

Spinning up with DC power applied

Spun down

N/A

On until spinup is complete

Start Unit

N/A

On while processing the command

Off due to absence of power

Powered down by removal of DC

power

Spun up

Stop Unit

On while processing the command

Off

Spun down

Spun up

No command activity

Write/Read Buffer

SCSI Bus Reset

Test Unit Ready

No command activity

Write/Read

On while processing the command

On while processing the reset

On while processing the command

Off

Spun up

On while processing the command

On while processing the reset

On while processing the command

Spun up

SCSI Bus Reset

Test Unit Ready

Spun up

Format with Immediate option on On while the command is initially processed

Spun up

Format without Immediate

LED toggles on/off on each cylinder

boundary

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Online services

Internet

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If you need help installing your drive, consult your system's documentation or contact the dealer's support ser-

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Hours of operation are 8:00 A.M. to 8:00 P.M., Monday through Friday, and 9:00 A.M. to 5:00 P.M., Saturday (Eastern time).

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bytes per sector 57

bytes/surface 11

bytes/track 11

Index

Symbols

+5 and +12 volt supplies 27

cable 65

Numerics

68 conductor connector 69

68-pin connector 71

80 conductor connector 69

80 conductor interface 69

80-pin connector option 68

80-pin I/O connector 76, 78

cache 13, 14, 15

cache buffer 9

cache miss 14

cache mode 13

cache operation 13

cache operation hit 15

cache segment 14

caching write data 14

Canadian Department of Communications 3

capacities 10

capacity, drive, programmable 10

CE Marking 4

changeable bit 59

changeable value 59

check condition 59

circuits 81

class B limit 3

command 13, 54

AC power 25

access time 12

accessories 10

acoustics 38

activity indicator 80

activity LED 86

actuator 9, 50

actuator assembly 8

address 13

AFR 9, 18

air cleanliness 37

air flow 50

suggested 50

altitude 34

altitude and atmospheric pressure 34

ambient 34

ANSI SCSI documents 5

arbitration priority 71

asynchronous interface transfer rate 85

audible noise 3

Australia/New Zealand Standard 4

automatic retry 17

automatic shipping lock 8

average idle current 25, 26

average latency 9

average rotational latency 11, 13

command descriptor block (CDB) 13

command queuing 9

condensation 34

conducted noise immunity 26, 27

connect/disconnect 13

connector 65

connector contact 80

consecutive read operation 15

contiguous blocks of data 15

continuous vibration 37

controller 13

controller overhead 12

controller self test 27

cooling 50

Corrosive environment 37

C-Tick Marking 4

current 27

current limiting 27

current profile 27, 28, 29, 30

current requirements 25

current value 59

background processing 9

backward compatibility 7

bits/inch 11

buffer 13, 14, 15

buffer segment 14, 15

buffer-full 14

cylinder boundary 15

daisy-chain 27, 67

data block size

buffer-full ratio 14

bulkhead connector 67

bus 71

modifing the 9

data correction 17

data transfer period 64

data transfer protocol 8

bus device reset message 59

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data transfer rate 12

DC cable and connector 65

DC current 67

DC power 13, 17, 49, 65

DC power carrying conductor 69

DC power connector 64

DC power requirements 25

DC power source 69

dedicated landing zone 8

default 48, 49

default mode parameter 45

default value 59

defect/error management 41

delayed motor start option 25, 26, 80

delayed start 49

ECC 17

ECC correction capability 8

electrical characteristics 64, 80

electromagnetic compatibility 3

electromagnetic susceptibility 38

embedded servo 8

EMC compliance 4

EMI requirements 3

environmental control 37

environmental limits 34

environmental requirements 17

EPROM 59

error 17

error management system 43

error rate 17

error recovery 41

ETF defect list 41

European Union requirements 4

EVPD bit 58

execution time 13

diagnostics 27

differential I/O circuit 49

differentiating features 7

dimensions 38

disable read ahead 15

disc access 13

disc media 12

extended messages 54

disc rotational speed 11

disconnect/reconnect 14

control 14

specification 14

discontinuity (DISC) bit 15

DRA bit 15

drive 37

drive activity 80

FCC rules and regulations 3

firmware 59

flat ribbon cable 80

flaw reallocation 13

format 57

drive activity LED 86

drive capacity 11

format command 12

format time 13

programmable 10

formatting 45

drive default mode parameter 45

drive failure 18

front panel 38

front panel LED 80

drive firmware 59

drive ID 45

drive ID select jumper connector 45

drive ID/option select header 45

drive interface connector 69

drive internal 27

drive internal defects and errors 41

drive malfunction 18

drive mounting 38, 51

constraints 17

GMR heads 7

gradient 34

ground return 27

grounding 51

hard reset 59

drive orientation 50

drive power 45

HDA 7, 51

heat removal 50

drive primary defects list 41

drive SCSI timing 84

drive select header 64

drive spindle 49

drive transfer 14

dynamic spindle brake 8

host 15, 41, 49, 57, 67, 71

host adapter 45

adapter/initiator 71

host backplane wiring 67

host equipment 51, 68, 69

DC power 69

host I/O signal 45

host system 45

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host system malfunction 17

host/drive operational interface 17

hot plug 8, 18

SCSI interface 53

miscellaneous features 63

mode page 01 59

humidity 34

mode page 08h 13

mode parameter 59

page 08h 15

mode select command 13, 59

mode select page 08h 15

mode sense command 59

mode sense command page 08h 14

mode sense data 59

I/O connector 67

identified defect 41

idle condition 31, 32, 33

Input characteristics 81

inquiry command 58

inquiry vital product data 58

installation 45

installation guide 10

installation instructions 45

instantaneous current peak 26

interface cable length 71

interface data 12

mode sense value 59

model number table 7

motor start command 13

motor start delay option 80

motor start option 13, 26, 80

mounting configuration 38

mounting configuration dimensions 39, 40

mounting constraints 17, 51

mounting point 51

interface requirements 53

interface timing 17

internal data rate 11

mounting surface 51

mounting surface distortion 51

mounting surface stiffness 51

MTBF 18

J1-auxiliary 45

MTBF, see AFR 18

jumper 10, 45, 48, 49, 80

jumper function description 49

jumper header 48

multiconnector

80 conductor 69

multimode drivers and receivers 8

multiple segment 14

jumper plug type 45

multi-segmented cache control 13

landing zone 8

LB 14

noise 27

LED 86

audible 3

logical 13

non-operating 34, 35, 37

temperature 34

non-operating vibration 37

nonshielded 68 conductor connector 69

logical block 13, 14, 15

logical characteristics 64

logical segment (mode select page 08h) 13

low voltage differential (LVD) drivers and receivers 8

LVD 80

LVD interface receiver circuits 81

office environment 37

operating 34, 35, 37

operating environment 18

operating option 45

operating parameter 59

option jumper 45

option jumper location 45

option select header 64

option select jumper 45

options 10

magnetoresistive heads 7

mating connector 65, 68, 69

mating flat cable connector 69

maximum current requirements 27

maximum operating current 27

maximum starting current 25, 26

ME jumper 49

media 8, 59

orientation 13, 35, 50

out-of-plane deflection 51

out-of-plane distortion 51

Output characteristics 80

message protocol 64

message protocol system 43

messages

Cheetah 10K.7 SCSI Product Manual, Rev. D

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read error rate 17, 41

read operation 14

read retry count 41

read/write head 11

ready 59

receive diagnostic results 43

receiver circuits 81

recommended mounting 36

Recoverable Errors 17

reference documents 5

regulation 25, 26

relative humidity 34

reliability 9

package size 35

package test specification 5

packaged 35

parity 49

parity checking 49

parity error 49

PCB 48

PCBA 45, 51, 59, 65, 67, 70

PCBA circuit run 67

PD jumper 49

peak bits/inch 11

peak starting current 27

performance characteristics 11

performance degradation 35

peripheral I/O cable 27

physical buffer space 13

physical characteristics 64

physical damage 37

physical interface 64, 66

physically contiguous blocks of data 15

power 27, 49

reliability and service 18

reliability specifications 17

remote switch 45

repair information 24

REQ/ACK offset 64

request sense command 43

resonance 35

retrieved data 14

power connector 25, 27

power control switch 13

power dissipation 31, 32, 33

power distribution 3

S.M.A.R.T. 9, 19

safe power transmission 69

safety 3

saved value 59

SCSI

power sequencing 27

power supply voltage 17

power-carrying conductor 69

power-on 45, 80

power-on operating hours 18

power-on reset 59

commands 54

interface data transfer rate 12

messages 53

SCSI bus cable 45

SCSI bus condition 63

SCSI bus ID 80

power-up 27, 49

power-up hours 18

SCSI bus phase sequence 63

SCSI command 41

SCSI I/O connector 66

SCSI ID 45, 49

prefetch 13, 14, 15

prefetch (read look-ahead) 13, 15

prefetch ceiling field 15

prefetch data 15

SCSI interface 13, 67

SCSI interface cable 68

SCSI interface commands supported 54

SCSI interface connector 64

SCSI interface data 12

SCSI Interface Product Manual 3, 5, 7

SCSI systems error 43

SCSI systems error consideration 41

SCSI systems error management 43

Seagate support service 45

sector 14

prefetch field 15

prefetch hit 15

prefetch mode 13

prefetch of contiguous blocks 15

prefetch operation 13, 15

prefetch segmented cache control 13

preventive maintenance 17, 18

PRML read channel electronics 7

product data page 58

programmable drive capacity 10

sector interleave 12

sector sizes 12

seek error 17

defined 18

segment 13, 14

self-contained 14

radio interference regulations 3

read command 13, 14, 15

read data 14

Cheetah 10K.7 SCSI Product Manual, Rev. D

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Self-Monitoring Analysis and Reporting Technology. typical access time 13

See S.M.A.R.T.

SE-LVD alternative 81

sequential read operations 15

service

Ultra160 59

Ultra160 mode 54

Ultra320 SCSI controller 8

life 17

shielding 3

Ultra320 SCSI interface 7

shipping 24

unformatted 9

shipping container 34

Unrecoverable Errors 17

shock 35

and vibration 35

shock mount 51

signal ground 51

vibration 35, 37

single unit shipping pack 10

single-ended (SE) drivers and receivers 8

single-ended interface circuit 31, 32, 33

software interleave 15

spindle 27

spindle startup 49

standard day 34

standards 3

start motor command 26

start unit command 49

start/stop time 13

status 43

stop spindle 13

vital product data 58

volatile memory 59

voltage 13, 25, 26

warranty 9, 23

wet bulb temperature 34

wide Ultra320 SCSI interface 7

WP jumper 49

wrap-around 14

write caching 14

write operation 14

write protect 49

write retry count 41

stop time 13

storage capacity 41

straight-in connector 70

strict bit in Mode page 00h 14

supply voltage 27

zoned bit recording (ZBR) 8

support services 87

synchronous data transfer 64

synchronous data transfer operation 85

synchronous data transfer period 64

synchronous transfer period 85

system chassis 51

technical support services 87

temperature 13, 20, 34, 50

non-operating 34

regulation 3