Seagate Computer Drive 100516226 User Guide

Product Manual  
®
Cheetah 15K.7 SAS  
Standard models  
ST3600057SS  
ST3450857SS  
ST3300657SS  
Self-Encrypting Drive models  
ST3600957SS  
ST3450757SS  
ST3300557SS  
SED FIPS 140-2 models  
ST3600857SS  
ST3450657SS  
ST3300457SS  
100516226  
Rev. F  
December 2012  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CONTENTS  
6.2.1  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
I
Download from Www.Somanuals.com. All Manuals Search And Download.  
CONTENTS  
11.3.2  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
II  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CONTENTS  
11.7  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
III  
Download from Www.Somanuals.com. All Manuals Search And Download.  
®
Seagate Technology Support Services  
Available services include:  
Presales & Technical support  
Global Support Services telephone numbers & business hours  
Authorized Service Centers  
For information regarding Warranty Support, visit http://www.seagate.com/support/warranty-and-returns/  
Cheetah 15K.7 SAS Product Manual, Rev. F  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
1.0 SCOPE  
This manual describes Seagate Technology® LLC, Cheetah® 15K.7 SAS (Serial Attached SCSI) disk drives.  
Cheetah 15K.7 drives support the SAS Protocol specifications to the extent described in this manual. The SAS Interface  
Manual (part number 100293071) describes the general SAS characteristics of Cheetah 15K.7 and other Seagate SAS  
drives. The Self-Encrypting Drive (SED) Users Guide, part number 100515636 describes the interface, general operation  
and security features available on SED drives.  
Table 1:  
SELF-ENCRYPTING DRIVE  
(SED)  
FIPS 140-2 LEVEL 2  
CERTIFIED  
MODEL NUMBER  
CAPACITY  
ST3600057SS  
ST3600957SS  
ST3600857SS  
ST3450857SS  
ST3450757SS  
ST3300457SS  
ST3300657SS  
ST3300557SS  
ST3300457SS  
600GB  
No  
No  
Yes  
Yes  
No  
No  
Yes  
No  
450GB  
300GB  
Yes  
Yes  
No  
No  
Yes  
No  
Yes  
Yes  
No  
Yes  
Note. Previous generations of Seagate Self-Encrypting Drive models were called Full Disk Encryption (FDE) models  
before a differentiation between drive-based encryption and other forms of encryption was necessary.  
Note. The Self-Encrypting Drive models indicated on the cover of this product manual have provisions for “Security of  
group.org).  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
2.0 STANDARDS, COMPLIANCE AND REFERENCE DOCUMENTS  
The drive has been developed as a system peripheral to the highest standards of design and construction. The drive  
depends on its host equipment to provide adequate power and environment for optimum 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 regulation. In particular, the drive must be securely mounted to guarantee  
2.1  
STANDARDS  
The Cheetah 15K.7 SAS family complies with Seagate standards as noted in the appropriate sections of this manual and the  
Seagate SAS Interface Manual, part number 100293071.  
The drives are recognized in accordance with UL 60950-1 and CSA 60950-1 as tested by UL and EN60950-1 as tested by  
TUV.  
The security features of Cheetah 15K.7 SAS SED models are based on the “TCG Storage Architecture Core Specification”  
and the “TCG Storage Workgroup Security Subsystem Class: Enterprise_A” specification with additional vendor-unique  
features as noted in this product manual.  
2.1.1 Electromagnetic compatibility  
The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use. 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 Communications.  
The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable  
shielding. The drive is capable of meeting the Class B limits of the FCC Rules and Regulations 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 controller.  
2.1.1.1 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  
2.2  
COMPLIANCE  
2.2.1 Electromagnetic compliance  
Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking and C-Tick  
Marking. The drive was tested in a representative system for typical applications. The selected system represents the most  
popular characteristics for test platforms. The system configurations include:  
• Typical current use microprocessor  
• Keyboard  
• Monitor/display  
• Printer  
• Mouse  
Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee that all  
systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance and provide the  
appropriate 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.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                     
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 Management Agency (SMA).  
Korean KCC  
If this model has the Korean Communications Commission (KCC) 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 two Chinese words meaning “EMC certification” followed by an eight digit identification number, as a  
Marking, it complies with Chinese National Standard (CNS) 13438 and meets the Electromagnetic Compatibility (EMC)  
Framework requirements of the Taiwanese Bureau of Standards, Metrology, and Inspection (BSMI).  
2.3  
EUROPEAN UNION RESTRICTION OF HAZARDOUS SUBSTANCES (ROHS)  
The European Union Restriction of Hazardous Substances (RoHS) Directive restricts the presence of chemical substances,  
including Lead (Pb), in electronic products effective July 2006.  
A number of parts and materials in Seagate products are procured from external suppliers. We rely on the representations of  
our suppliers regarding the presence of RoHS substances in these parts and materials. Our supplier contracts require  
compliance with our chemical substance restrictions, and our suppliers document their compliance with our requirements by  
providing material content declarations for all parts and materials for the disk drives documented in this publication. Current  
supplier declarations include disclosure of the inclusion of any RoHS-regulated substance in such parts or materials.  
Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws and  
regulations which restrict chemical content in electronic products. These systems include standard operating procedures that  
ensure that restricted substances are not utilized in our manufacturing operations, laboratory analytical validation testing,  
and an internal auditing process to ensure that all standard operating procedures are complied with.  
2.4  
REFERENCE DOCUMENTS  
SCSI Commands Reference ManualSeagate part number: 100293068  
SAS Interface Manual  
ANSI SAS documents  
Seagate part number: 100293071  
SFF-83233.5” Drive Form Factor with Serial Connector  
SFF-8460HSS Backplane Design Guidelines  
SFF-8470Multi Lane Copper Connector  
SFF-8482SAS Plug Connector  
ANSI INCITS.xxx Serial Attached SCSI (SAS-2) Standard (T10/1562-D)  
ISO/IEC 14776-xxxSCSI Architecure Model-4 (SAM-4) Standard (T10/1561-D)  
ISO/IEC 14776-xxxSCSI Primary Commands-3 (SPC-3) Standard (T10/1416-D)  
ISO/IEC 14776-xxxSCSI Block Commands-2 (SBC-2) Standard (T10/1417-D)  
Trusted Computing Group (TCG) Documents (apply to SED models only)  
TCG Core Specification, version 0.9  
TCG SSC Specification (draft)  
Self-Encrypting Drives Users Guide‘Seagate part number: 100515636  
Specification for Acoustic Test Requirement and ProceduresSeagate part number: 30553-001  
Package Test Specification Seagate P/N 30190-001 (under 100 lb.)  
Package Test Specification Seagate P/N 30191-001 (over 100 lb.)  
In case of conflict between this document and any referenced document, this document takes precedence.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
           
3.0 GENERAL DESCRIPTION  
Cheetah 15K.7 drives provide high performance, high capacity data storage for a variety of systems including engineering  
workstations, network servers, mainframes, and supercomputers. The Serial Attached SCSI interface is designed to meet  
next-generation computing demands for performance, scalability, flexibility and high-density storage requirements.  
Cheetah 15K.7 drives support the Serial Attached SCSI Protocol as described in the ANSI specifications, this document, and  
the SAS Interface Manual (part number 100293071) which describes the general interface characteristics of this drive.  
Cheetah 15K.7 drives are classified as intelligent peripherals and provide level 2 conformance (highest level) with the ANSI  
SCSI-1 standard. The SAS connectors, cables and electrical interface are compatible with Serial ATA (SATA), giving future  
users the choice of populating their systems with either SAS or SATA hard disk drives. This allows you to continue to  
leverage your existing investment in SCSI while gaining a 3Gb/s serial data transfer rate.  
Cheetah 15K.7 SAS SED models have provisions for “Security of Data at Rest” based on the standards defined by the  
Trusted Computing Group (see www.trustedcomputinggroup.org).  
Note. Never disassemble the HDA and do not attempt to service items in the sealed enclosure (heads, media, actuator,  
etc.) as this requires special facilities. The drive does not contain user-replaceable parts. Opening the HDA for  
any reason voids your warranty.  
Cheetah 15K.7 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 heads automatically go to the landing zone when power is  
removed from the drive.  
An automatic shipping lock prevents potential damage to the heads and disks that results from movement during shipping  
and handling. The shipping lock disengages and the head load process begins when power is applied to the drive.  
The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm design that  
provides excellent performance with minimal power dissipation.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
3.1  
STANDARD FEATURES  
Cheetah 15K.7 drives have the following standard features:  
• 1.5 / 3 / 6 Gbit Serial Attached SCSI (SAS) interface  
• Integrated dual port SAS controller supporting the SCSI protocol  
• Support for SAS expanders and fanout adapters  
• Firmware downloadable using the SAS interface  
• 128 - deep task set (queue)  
• Supports up to 32 initiators  
• Jumperless configuration.  
• User-selectable logical block size (512, 520, or 528 bytes per logical block)  
• Programmable logical block reallocation scheme  
• Flawed logical block 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  
• No preventive maintenance or adjustments required  
• Dedicated head landing zone  
• Embedded servo design  
• Automatic shipping lock  
• Self diagnostics performed when power is applied to the drive  
• Zone bit recording  
• Vertical, horizontal, or top down mounting  
• Dynamic spindle brake  
• 16 Mbyte data buffer  
• Drive Self Test  
• Background Media Scan  
• Power Save  
Cheetah 15K.7 SAS SED models have the following additional features:  
• Automatic data encryption/decryption on all writes and reads to and from the media  
• Controlled access  
• Random number generator  
• Drive locking  
• Two independent data bands which each have it’s own ownership credential and encryption key  
• Cryptographic erase of user data for a drive that will be repurposed or scrapped  
• Authenticated firmware download  
3.2  
MEDIA DESCRIPTION  
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.  
3.3  
PERFORMANCE  
• Programable multi-segmented cache buffer  
• 600 Mbytes/sec maximum instantaneous data transfers  
• 15k RPM spindle. Average latency = 2.0 msec  
• Background processing of queue  
• Supports start and stop commands (spindle stops spinning)  
• Adaptive seek velocity; improved seek performance  
Note. There is no significant performance difference between Self-Encrypting Drive and standard (non-Self-Encrypting  
Drive models.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
                           
3.4  
RELIABILITY  
• 1,600,000 hour MTBF (Annualized Failure Rate (AFR) of 0.55%)  
• 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 block size is selectable at format time and must be one of  
the supported sizes listed in the table below.  
Seagate designs specify capacity points at certain block 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:  
Table 1:  
ST3600057SS  
ST3600957SS  
ST3600857SS  
ST3450857SS  
ST3450757SS  
ST3450657SS  
ST3300657FC  
ST3300557FC  
ST3300457SS  
SECTOR SIZE  
DECIMAL  
HEX  
DECIMAL  
HEX  
DECIMAL  
HEX  
512  
520  
524  
528  
1,172,123,568  
1,147,307,694  
1,132,015,600  
1,115,749,560  
45DD2FB0  
446286AE  
43792FF0  
4280FCB8  
879,097,968  
860,480,771  
849,011,700  
836,812,167  
3465F870  
3349E503  
329AE3F4  
31E0BD87  
585,937,500  
573,653,848  
566,007,800  
557,874,778  
22ECB25C  
22314358  
21BC97F8  
21407E5A  
3.6  
PROGRAMMABLE DRIVE CAPACITY  
Using the Mode Select command, the drive can change its capacity to something less than maximum. See the Mode Select  
(6) parameter list table in the SAS Interface Manual, part number 100293071. A value of zero in the Number of Blocks field  
indicates that the drive will not change the capacity it is currently formatted to have. A number other than zero and less than  
the maximum number of LBAs in the Number of Blocks field changes the total drive capacity to the value in the Number of  
Blocks field. A value greater than the maximum number of LBAs is rounded down to the maximum capacity.  
3.7  
FACTORY-INSTALLED OPTIONS  
You may order the following items which are incorporated at the manufacturing facility during production or packaged 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 plan-  
ning single unit distribution should specify this option.  
• The Safety and Regulatory Agency Specifications, part number 75789512, may be included with each standard OEM drive  
shipped.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
4.0 PERFORMANCE CHARACTERISTICS  
This section provides detailed information concerning performance-related characteristics and features of Cheetah 15K.7  
drives.  
4.1  
INTERNAL DRIVE CHARACTERISTICS  
ST3600057SS ST3450857SS ST3300657SS  
ST3600957SS ST3450757SS ST3300557SS  
ST3600857SS ST3450657SS ST3300457SS  
*
Drive capacity  
600  
450  
300  
Gbytes (formatted, rounded off value)  
Read/write data heads  
Tracks per inch  
Peak bits per inch  
Areal Density  
8
6
4
165,000  
1,361  
225  
165,000  
1,361  
225  
165,000  
1,361  
225  
TPI  
KBPI  
Gbits/inch  
2
Internal data rate  
Disk rotation speed  
Avg rotational latency  
1.49 - 2.37  
15k  
2.0  
1.49 - 2.37  
15k  
2.0  
1.49 - 2.37  
15k  
2.0  
Gbits/sec (max)  
RPM  
msec  
*One Gbyte equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting.  
4.2  
SEEK TIME  
See Section 11.4.1, "SAS physical interface" on page 47 and the SAS Interface Manual (part number 100293071) for  
additional timing details.  
4.2.1 Access time  
1 2  
,
NOT INCLUDING CONTROLLER OVERHEAD  
(MSEC)  
READ  
3.4  
WRITE  
3.9  
Average  
Typical  
Typical  
Typical  
Single track  
Full stroke  
0.2  
0.44  
7.4  
6.6  
1.  
2.  
Typical access times are measured under nominal conditions of temperature, voltage, and horizontal  
orientation as measured on a representative sample of drives.  
Access to data = access time + latency time.  
4.2.2 Format command execution time (minutes)  
When changing sector sizes, the format times shown below may need to be increased by 30 minutes.  
600GB  
450GB  
300GB  
Maximum (with verify)  
119  
60  
90  
45  
58  
29  
Maximum (without verify)  
Note. There is approximately a 1.5 increase in time to format a SED drive versus a non-SED drive of the same capacity.  
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).  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                                 
4.2.3 General performance characteristics  
Sustainable disk transfer rate*:  
Minimum  
122 Mbytes/sec (typical)  
204 Mbytes/sec (typical)  
Maximum  
SAS Interface maximum instantaneous transfer rate  
Logical block sizes  
600 Mbytes/sec* per port  
Default is 512-byte data blocks  
Sector sizes variable to 512, 520, and 528 kbytes.  
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  
2.0 msec  
*Assumes system ability to support the rates listed and no cable loss.  
1 MB/sec = 1,000,000 bytes/sec  
4.3  
START/STOP TIME  
The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied.  
If the drive receives a NOTIFY (ENABLE SPINUP) primitive through either port and has not received a START STOP UNIT  
command with the START bit equal to 0, the drive becomes ready for normal operations within 20 seconds (excluding the  
error recovery procedure).  
If the drive receives a START STOP UNIT command with the START bit equal to 0 before receiving a NOTIFY (ENABLE  
SPINUP) primitive, the drive waits for a START STOP UNIT command with the START bit equal to 1. After receiving a  
START STOP UNIT command with the START bit equal to 1, the drive waits for a NOTIFY (ENABLE SPINUP) primitive.  
After receiving a NOTIFY (ENABLE SPINUP) primitive through either port, the drive becomes ready for normal operations  
within 20 seconds (excluding the error recovery procedure).  
If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a  
NOTIFY (ENABLE SPINUP) primitive within 5 seconds, the drive fails the START STOP UNIT command.  
The START STOP UNIT command may be used to command the drive to stop the spindle. Stop time is 30 seconds  
(maximum) from removal of DC power. There is no power control switch on the drive.  
4.4  
PREFETCH/MULTI-SEGMENTED CACHE CONTROL  
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many cases can  
enhance system performance. Cache refers to the drive buffer storage space when it is used in cache operations. To select  
this feature, the host sends the Mode Select command with the proper values in the applicable bytes in page 08h. Prefetch  
and cache operations are independent features from the standpoint that each is enabled and disabled independently using  
the Mode Select command; however, in actual operation, the prefetch feature overlaps cache operation somewhat as  
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this drive family are  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
4.5  
CACHE OPERATION  
Note. Refer to the SAS Interface Manual for more detail concerning the cache bits.  
Of the 16 Mbytes physical buffer space in the drive, approximately 13,000 kbytes can be used as a cache. The buffer is  
divided into logical segments from which data is read and to which data is written.  
The drive keeps track of the logical block addresses of the data stored in each segment of the buffer. If the cache is enabled  
(see RCD bit in the SAS Interface Manual), data requested by the host with a read command is retrieved from the buffer, if  
possible, before any disk access is initiated. If cache operation is not enabled, the buffer is still used, but only as circular  
buffer segments during disk 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 segment on the way to the host. All data transfers to the host are in  
accordance with buffer-full ratio rules. See the explanation provided with the information about Mode Page 02h (disconnect/  
reconnect control) in the SAS Interface Manual.  
The following is a simplified description of the prefetch/cache operation:  
Case A—read command is received and all of the requested logical blocks are already in the cache:  
1. Drive transfers the requested logical blocks to the initiator.  
Case B—A Read command requests data, and at least one requested logical block is not in any segment of the cache:  
1. The drive fetches the requested logical blocks from the disk and transfers them into a segment, and then from there to  
the host in accordance with the Mode Select Disconnect/Reconnect parameters, page 02h.  
2. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.  
Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical blocks. The  
drive dynamically creates and removes segments based on the workload. The wrap-around capability of the individual  
segments greatly enhances the cache’s overall performance.  
Note. The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15. The value  
0XFFFF is always reported regardless of the actual size of the segment. Sending a size specification using the  
Mode Select command (bytes 14 and 15) does not set up a new segment size. 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 an unchangeable param-  
eter.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
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 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 available 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 exceed 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.  
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.  
4.5.2 Prefetch operation  
If the Prefetch feature is enabled, data in contiguous logical blocks on the disk immediately beyond that which was requested  
by a Read command are 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.  
To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0 enables prefetch.  
The drive does not use the Max Prefetch field (bytes 8 and 9) or the Prefetch Ceiling field (bytes 10 and 11).  
When prefetch (read look-ahead) is enabled (enabled by DRA = 0), the drive enables prefetch of contiguous blocks from the  
disk when it senses that a prefetch hit will likely occur. The drive disables prefetch when it decides that a prefetch hit is not  
likely to occur.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
5.0 RELIABILITY SPECIFICATIONS  
The following reliability specifications assume correct host and drive operational interface, including all interface timings,  
power supply voltages, environmental requirements and drive mounting constraints.  
Seek error rate:  
Less than 10 errors in 108 seeks  
Read Error Rates  
Recovered Data  
Less than 10 errors in 1012 bits transferred (OEM default settings)  
Less than 1 sector in 1016 bits transferred  
Less than 1 sector in 1021 bits transferred  
Less than 1 error in 1012 bits transferred  
1,600,000 hours  
Unrecovered Data  
Miscorrected Data  
Interface error rate:  
MTBF  
AFR  
0.55%  
Preventive maintenance:  
None required  
5.1  
ERROR RATES  
The error rates stated in this manual 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.  
• Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated  
5.1.1 Recoverable Errors  
Recoverable errors are those detected and corrected by the drive, and do not require user intervention.  
Recoverable Data errors use retries and correction. Application of ECC on-the-fly correction alone is not considered a  
Recovered Data error.  
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 1016 bits transferred.  
Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block.  
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  
8
specified at Less than 10 errors in 10 seeks. Unrecoverable seek errors (Sense Key = 04h) are classified as drive failures.  
5.1.4 Interface errors  
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port  
connected to the receiver. The error may be detected as a running disparity error, illegal code, loss of word sync, or CRC  
error.  
5.2  
RELIABILITY AND SERVICE  
You can enhance the reliability of Cheetah disk drives by ensuring that the drive receives adequate cooling. Section 6.0  
provides temperature measurements and other information that may be used to enhance the service life of the drive. Section  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                               
5.2.1 Annualized Failrue Rate (AFR) and Mean time between failure (MTBF)  
These drives shall achieve an AFR of 0.55% (MTBF of 1,600,000 hours) when operated in an environment that ensures the  
and MTBF statistics are population statistics that are not relevant to individual units.  
AFR and MTBF specifications are based on the following assumptions for Enterprise Storage System environments:  
• 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.  
5.2.2 Preventive maintenance  
No routine scheduled preventive maintenance is required.  
5.2.3 Hot plugging the drive  
When a disk is powered on by switching the power or hot plugged, the drive runs a self test before attempting to  
communicate on its’ interfaces. When the self test completes successfully, the drive initiates a Link Reset starting with OOB.  
An attached device should respond to the link reset. If the link reset attempt fails, or any time the drive looses sync, the drive  
initiated link reset. The drive will initiate link reset once per second but alternates between port A and B. Therefore each port  
will attempt a link reset once per 2 seconds assuming both ports are out of sync..  
If the self-test fails, the does not respond to link reset on the failing port.  
Note. It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard, or ESD  
potential hazard is presented during the hot connect/disconnect operation. Discharge the static electricity from  
the drive carrier prior to inserting it into the system.  
Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is required to  
insure data integrity.  
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 imminent drive failure and is designed to provide sufficient warning of a failure to allow you to back up  
the data before an actual failure occurs.  
Note. The drive’s firmware monitors specific attributes for degradation over time but can’t predict instantaneous drive  
failures.  
Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating performance of the  
drive and the thresholds are optimized to minimize “false” and “failed” predictions.  
Controlling S.M.A.R.T.  
The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control  
mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEXCPT bit disables all  
S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs normal read and 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.  
You can measure off-line attributes and force the drive to save the data by using the Rezero Unit command. Forcing  
S.M.A.R.T. resets the timer so that the next scheduled interrupt is in two hours.  
You can interrogate the drive through the host to determine the time remaining before the next scheduled measurement and  
data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E. This allows you to control  
when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command resets the timer.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
           
Performance impact  
S.M.A.R.T. attribute data is saved to the disk so that the events that caused a predictive failure can be recreated. The drive  
measures and saves parameters once every two hours subject to an idle period on the drive interfaces. The process of  
measuring off-line attribute data and saving data to the disk is uninterruptable. The maximum on-line only processing delay is  
summarized below:  
Table 2:  
Maximum processing delay  
On-line only delay  
Fully-enabled delay  
DEXCPT = 0, PERF = 1  
DEXCPT = 0, PERF = 0  
42 milliseconds  
S.M.A.R.T. delay times  
163 milliseconds  
Reporting control  
Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to the reporting  
method, the firmware will issue to the host an 01-5Dxx 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 errors increases to  
an unacceptable level. To determine rate, error events are logged and compared to the number of total operations for a given  
attribute. The interval defines the number of operations over which to measure 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 rates. All errors for each monitored attribute are 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 the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to set  
thresholds for the number of errors and their interval. If the number of errors exceeds the threshold before the interval  
expires, the error rate is considered to be unacceptable. If the number of errors does not exceed the threshold before the  
interval expires, the error rate is considered to be acceptable. 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 firmware keeps a  
running count of the number of times the error rate for each attribute is unacceptable. To accomplish this, a counter is  
incremented each time the error rate is unacceptable and decremented (not to exceed zero) whenever the error rate is  
acceptable. If the counter continually increments such that it reaches the predictive threshold, a predictive failure is signaled.  
This counter is referred to as the Failure History Counter. There is a separate Failure History Counter for each attribute.  
5.2.5 Thermal monitor  
Cheetah 15K.7 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 exceeds the threatening temperature value.  
A temperature sensor monitors the drive temperature and issues a warning over the interface when the temperature  
exceeds a set threshold. The temperature is measured at power-up and then at ten-minute intervals after power-up.  
The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the specified 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).  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
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  
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 2 Temperature Log Page (0Dh)  
Parameter Code  
0000h  
Description  
Primary Temperature  
Reference Temperature  
0001h  
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 test  
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.  
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.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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 disk  
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.  
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.  
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.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 parameter 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 set to zero, the drive  
passed with no errors detected by the DST. If the field is not set to 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 the customer and continuing for the period specified in your purchase contract,  
Seagate warrants that each product (including components and subassemblies) that fails to function properly under normal  
use due to defect in materials or workmanship or due to nonconformance to the applicable specifications will be repaired or  
replaced, at Seagate’s option and at no charge to the customer, if returned by customer at customer’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 the customer. For more detailed warranty information, refer to the standard terms and conditions of  
purchase for Seagate products on your purchase documentation.  
The remaining warranty for a particular drive can be determined by calling Seagate Customer Service at 1-800-468-3472.  
required to determine remaining warranty information.  
Shipping  
When transporting or shipping a drive, use only a Seagate-approved container. Keep your original box. Seagate approved  
containers are easily identified by the Seagate Approved Package label. Shipping a drive in a non-approved container voids  
the drive warranty.  
Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in transit. 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 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 factory seal voids the warranty.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
6.0 PHYSICAL/ELECTRICAL SPECIFICATIONS  
This section provides information relating to the physical and electrical characteristics of the drive.  
6.1  
AC POWER REQUIREMENTS  
None.  
6.2  
DC POWER REQUIREMENTS  
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.  
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion  
of the drive controller ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V  
supply of about 30mA and a commensurate increase of about 150mW in power consumption. There is no additional drain on  
the 12V supply.  
Table 3 600 GB DC power requirements  
3 GBIT MODE  
6 GBIT MODE  
NOTES  
(AMPS)  
+5V  
(AMPS)  
(AMPS)  
+5V  
(AMPS)  
Voltage  
+12V [2]  
±5% [2]  
0.81  
+12V [2]  
±5% [2]  
0.81  
Regulation  
[5]  
±5%  
±5%  
Avg idle current  
[1] [7]  
0.37  
0.38  
Maximum starting current  
(peak DC) DC  
3σ  
3σ  
3σ  
[3]  
0.67  
0.98  
0.55  
1.90  
3.82  
0.04  
0.68  
0.98  
0.56  
1.91  
3.88  
0.04  
(peak AC) AC  
[3]  
Delayed motor start (max) DC  
Peak operating current (random read):  
Typical DC  
[1] [4]  
[1][6] [1]  
0.44  
0.49  
1.32  
1.15  
1.20  
3.00  
0.45  
0.51  
1.34  
1.17  
1.21  
3.00  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (random write):  
Typical DC  
3σ  
[1][6] [1]  
0.51  
0.56  
1.26  
1.03  
1.05  
2.94  
0.53  
0.58  
1.28  
1.04  
1.07  
2.92  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential read):  
Typical DC  
3σ  
[1][6] [1]  
0.98  
1.08  
1.40  
0.83  
0.84  
1.26  
0.99  
1.10  
1.46  
0.84  
0.85  
1.24  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential write):  
Typical DC  
3σ  
[1][6] [1]  
0.93  
1.00  
1.30  
0.83  
0.84  
1.24  
0.94  
1.02  
1.30  
0.83  
0.85  
1.26  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
3σ  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                         
Table 4 450 GB DC power requirements  
3 GBIT MODE  
6 GBIT MODE  
NOTES  
(AMPS)  
+5V  
(AMPS)  
(AMPS)  
+5V  
(AMPS)  
Voltage  
+12V [2]  
±5% [2]  
0.68  
+12V [2]  
±5% [2]  
0.66  
Regulation  
[5]  
±5%  
±5%  
Avg idle current  
[1] [7]  
0.39  
0.41  
Maximum starting current  
(peak DC) DC  
3σ  
3σ  
3σ  
[3]  
0.65  
0.94  
0.54  
1.94  
3.91  
0.04  
0.67  
0.96  
0.56  
1.94  
3.89  
0.04  
(peak AC) AC  
[3]  
Delayed motor start (max) DC  
Peak operating current (random read):  
Typical DC  
[1] [4]  
[1][6] [1]  
0.45  
0.48  
1.28  
1.01  
1.08  
2.90  
0.47  
0.51  
1.30  
1.02  
1.06  
2.84  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (random write):  
Typical DC  
3σ  
[1][6] [1]  
0.52  
0.56  
1.24  
0.90  
0.93  
2.78  
0.55  
0.58  
1.26  
0.89  
0.91  
2.84  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential read):  
Typical DC  
3σ  
[1][6] [1]  
0.98  
1.04  
1.36  
0.69  
0.70  
1.10  
1.03  
1.10  
1.44  
0.67  
0.68  
1.10  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential write):  
Typical DC  
3σ  
[1][6] [1]  
0.95  
0.99  
1.26  
0.69  
0.70  
1.10  
0.98  
1.02  
1.30  
0.67  
0.68  
1.12  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
3σ  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Table 5 300 GB DC power requirements  
3 GBIT MODE  
6 GBIT MODE  
NOTES  
(AMPS)  
+5V  
(AMPS)  
(AMPS)  
+5V  
(AMPS)  
Voltage  
+12V [2]  
±5% [2]  
0.58  
+12V [2]  
±5% [2]  
0.58  
Regulation  
[5]  
±5%  
±5%  
Avg idle current  
[1] [7]  
0.34  
0.35  
Maximum starting current  
(peak DC) DC  
3σ  
3σ  
3σ  
[3]  
0.53  
0.98  
0.47  
1.92  
3.82  
0.04  
0.54  
0.86  
0.48  
1.92  
3.98  
0.04  
(peak AC) AC  
[3]  
Delayed motor start (max) DC  
Peak operating current (random read):  
Typical DC  
[1] [4]  
[1][6] [1]  
0.41  
0.42  
1.18  
0.88  
0.95  
2.78  
0.42  
0.43  
1.20  
0.90  
0.95  
2.74  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (random write):  
Typical DC  
3σ  
[1][6] [1]  
0.48  
0.49  
1.18  
0.80  
0.83  
2.68  
0.49  
0.51  
1.20  
0.81  
0.82  
2.66  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential read):  
Typical DC  
3σ  
[1][6] [1]  
0.91  
0.93  
1.20  
0.59  
0.60  
0.98  
0.92  
0.94  
1.24  
0.59  
0.61  
1.00  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
Peak operating current (sequential write):  
Typical DC  
3σ  
[1][6] [1]  
0.89  
0.93  
1.22  
0.58  
0.60  
0.98  
0.90  
0.94  
1.22  
0.59  
0.60  
0.96  
Maximum DC  
3σ  
[1]  
Maximum DC (peak)  
3σ  
[1] Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous +12V current peaks will  
exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.  
[2] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 15,000 RPM.  
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 +12V current profile in Figure 1.  
[4] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup  
primitive.  
[5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient  
response.  
[6] Operating condition is defined as random 8 block reads at 375 I/Os per second for 600GB models, and 380 I/Os per  
second for 450GB and 300GB models. Current and power specified at nominal voltages.  
[7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to  
maximum track.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
20  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
General DC power requirement notes.  
1. Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.  
2. The +5V and +12V supplies should 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 10 MHz. Maximum  
allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.  
+5V  
=
250 mV pp from 100 Hz to 20 MHz.  
+12V = 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.  
6.2.3 Current profiles  
The +12V and +5V current profiles are shown below in the following figures.  
Note: All times and currents are typical. See Tables 3, 4, and 5 for maximum current requirements.  
Figure 1.  
Typical 600GB current profiles  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
21  
Download from Www.Somanuals.com. All Manuals Search And Download.  
               
Figure 2.  
Typical 450GB current profiles  
Figure 3.  
Typical 300GB current profiles  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
22  
Download from Www.Somanuals.com. All Manuals Search And Download.  
6.3  
POWER DISSIPATION  
600GB model  
Typical power dissipation under idle conditions in 6Gb operation is 11.62 watts (39.65 BTUs per hour).  
typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current,  
and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.  
Figure 4.  
ST3600057SS DC current and power vs. input/output operations per second  
450GB model  
Typical power dissipation under idle conditions in 6Gb operation is 9.97 watts (34.02 BTUs per hour).  
typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current,  
and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.  
Figure 5.  
ST3450857SS DC current and power vs. input/output operations per second  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
23  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
300GB model  
Typical power dissipation under idle conditions in 6Gb operation is 8.71 watts (29.72 BTUs per hour).  
typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current,  
and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.  
Figure 6.  
ST3300657SS DC current and power vs. input/output operations per second  
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 Annualized Failure Rate (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 the 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 68°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 68°F (20°C) per hour. This specification  
assumes that the drive is packaged in the shipping container designed by Seagate for use with drive.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
24  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                   
DA T emp  
Check Point  
1
0
5
Figure 7.  
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)  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
25  
Download from Www.Somanuals.com. All Manuals Search And Download.  
               
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  
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 duration of 11 msec (half sinewave)  
• 20 Gs at a duration of 2 msec (half sinewave)  
• 60 Gs at a duration of 2 msec (half sinewave) when performing reads only  
Shock may be applied in the X, Y, or Z axis. Shock is not to be repeated more than once every 2 seconds.  
b. Operating—abnormal  
Equipment, as installed for normal operation, does not incur physical damage while subjected to intermittent shock not  
exceeding 40 Gs at a duration of 11 msec (half sinewave). Shock occurring at abnormal levels may promote degraded  
operational performance during the abnormal shock period. Specified 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 once  
every 2 seconds.  
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 the three values below, shall not exhibit device damage or  
performance degradation.  
• 80 Gs at a duration of 11 msec (half sinewave)  
• 300 Gs at a duration of 2 msec (half sinewave)  
• 150 Gs at a duration of 0.5 msec (half sinewave)  
Shock may be applied in the X, Y, or Z axis.  
d. Packaged  
disk drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from heights as  
defined in the table 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  
DROP HEIGHT  
<600 cu in (<9,800 cu cm)  
Any  
60 in (1524 mm)  
48 in (1219 mm)  
42 in (1067 mm)  
36 in (914 mm)  
600-1800 cu in (9,800-19,700 cu cm)  
>1800 cu in (>19,700 cu cm)  
>600 cu in (>9,800 cu cm)  
0-20 lb (0 to 9.1 kg)  
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.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
26  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
Z
X
Y
X
Z
Y
Figure 8.  
Recommended mounting  
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  
10 – 300 Hz  
301– 500 Hz  
1.0 G RMS (0 to peak)  
0.5 G RMS (0 to peak)  
Vibration may be applied in the X, Y, or Z axis.  
b. Operating—abnormal  
Equipment 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  
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. This assumes system  
recovery routines are available.  
Operating abnormal translational random flat profile  
5 – 500 Hz  
10 - 300 Hz  
0.75 G (0 to peak)  
0.0029 G2/Hz  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
27  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
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  
22 - 350 Hz  
350 - 500 Hz  
0.25 G (0 to peak, linear, swept sine, 0.5 octive/min)  
3 G (0 to peak, linear, swept sine, 0.5 octive/min)  
1 G (0 to peak, linear, swept sine, 0.5 octive/min)  
Vibration may be applied in the X, Y, or Z axis.  
6.4.5 Acoustics  
Sound power during idle mode shall be 3.4 bels typical when measured to ISO 7779 specification. Sound power while  
operating shall be 3.8 bels typical 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 measured according  
to Seagate specification 30553-001. There will not be any tones more than 24 dB above the masking noise on any drive.  
6.4.6 Air cleanliness  
The drive is designed to operate in a typical office environment with minimal environmental control.  
6.4.7 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 corrosive chemicals  
as electronic drive component reliability can be affected by the installation environment. The silver, 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 vulcanized 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.  
6.4.8 RoHS compliance statement  
The European Union Restriction of Hazardous Substances (RoHS) Directive restricts the presence of chemical substances,  
including Lead (Pb), in electronic products effective July 2006.  
A number of parts and materials in Seagate products are procured from external suppliers. We rely on the representations of  
our suppliers regarding the presence of RoHS substances in these parts and materials. Our supplier contracts require  
compliance with our chemical substance restrictions, and our suppliers document their compliance with our requirements by  
providing material content declarations for all parts and materials for the disk drives documented in this publication. Current  
supplier declarations include disclosure of the inclusion of any RoHS-regulated substance in such parts or materials.  
Seagate also has internal systems in place to ensure ongoing compliance with the RoHS Directive and all laws and  
regulations which restrict chemical content in electronic products. These systems include standard operating procedures that  
ensure that restricted substances are not utilized in our manufacturing operations, laboratory analytical validation testing,  
and an internal auditing process to ensure that we comply with all standard operating procedures.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
28  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                 
6.4.9 Electromagnetic susceptibility  
6.5  
MECHANICAL SPECIFICATIONS  
Height:  
Width:  
Depth:  
1.03 in  
4.00 in  
5.79 in  
26.10 mm  
101.60 mm  
147 mm  
Weight (max): 1.76 pounds  
0.80 kilograms  
26.11 MAX  
2X 20.14  
(2X .793)  
(1.028 MAX)  
24.00  
(.945)  
6.35 (.250)  
4.22 X 90 ( .166 X 90 )  
0.36  
2X 28.45  
(2X 1.120)  
(
.014)  
2X 70.05 (2X 2.758)  
122.00 (4.803)  
2X 130.05 (2X 5.120)  
UNITS OF MEASURE: mm (inches)  
146.99 MAX (5.787 MAX)  
131.17 (5.164)  
4.57 MIN BLIND  
( .18 MIN BLIND)  
85.60 (3.370)  
41.15 (1.620)  
4.22 X 90 ( .166 X 90 )  
20.14  
(.793)  
0.36  
2X 29.21  
(2X 1.150)  
(
.014)  
1.45 (.057)  
3.17 (.125)  
DRIVE  
CENTER  
LINE  
101.60 +/- .25  
(4.000 +/- .010)  
50.80  
(2.000)  
2X 100.13  
(2X 3.942)  
20.68 (.814)  
98.42  
(3.875)  
33.40  
(1.315)  
0.76  
.030)  
(
0.13  
(.005)  
36.37  
(1.432)  
0.13  
(.005)  
3.50 +/- .38  
(.138 +/- .015)  
0.99  
(.039)  
0.41  
0.25  
(.010)  
(.016)  
Figure 9.  
Physical dimensions  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
29  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
7.0 ABOUT FIPS  
The Federal Information Processing Standard (FIPS) Publication 140-2 is a U.S. Government Computer Security Standard  
used to accredit cryptographic modules. It is titled 'Security Requirements for Cryptographic Modules (FIPS PUB 140-2)' and  
is issued by the National Institute of Standards and Technology (NIST).  
Purpose  
This standard specifies the security requirements that will be satisfied by a cryptographic module utilized within a security  
system protecting sensitive but unclassified information. The standard provides four increasing, qualitative levels of security:  
Level 1, Level 2, Level 3 and Level 4. These levels are intended to cover the wide range of potential applications and  
environments in which cryptographic modules may be employed.  
Validation Program  
Products that claim conformance to this standard are validated by the Cryptographic Module Validation Program (CMVP)  
which is a joint effort between National Institute of Standards and Technology (NIST) and the Communications Security  
Establishment (CSE) of the Government of Canada. Products validated as conforming to FIPS 140-2 are accepted by the  
Federal agencies of both countries for the protection of sensitive information (United States) or Designated Information  
(Canada).  
In the CMVP, vendors of cryptographic modules use independent, accredited testing laborites to have their modules tested.  
National Voluntary Laboratory Accreditation Program (NVLAP) accredited laboratories perform cryptographic module  
compliance/conformance testing.  
Seagate Enterprise SED  
FIPS 140-2 Level 2 requirements. In order to operate in FIPS Approved Mode of Operation, these SEDs require security  
STM/cmvp/documents/140-1/140val-all.htm  
Security Level 2  
Security Level 2 enhances the physical security mechanisms of a Security Level 1 cryptographic module by adding the  
requirement for tamper-evidence, which includes the use of tamper-evident coatings or seals on removable covers of the  
module. Tamper-evident coatings or seals are placed on a cryptographic module so that the coating or seal must be bro-  
ken to attain physical access to the critical security parameters (CSP) within the module. Tamper-evident seals are placed  
on covers to protect against unauthorized physical access. In addition Security Level 2 requires, at a minimum, role-based  
authentication in which a cryptographic module authenticates the authorization of an operator to assume a specific role  
and perform a corresponding set of services.  
Figure 10. Example of FIPS tamper evidence labels.  
Note. Image is for reference only, may not represent actual drive..  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
30  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
8.0 ABOUT SELF-ENCRYPTING DRIVES  
Self-encrypting drives (SEDs) offer encryption and security services for the protection of stored data, commonly known as  
“protection of data at rest.” These drives are compliant with the Trusted Computing Group (TCG) Enterprise Storage  
The Trusted Computing Group (TCG) is an organization sponsored and operated by companies in the computer, storage  
and digital communications industry. Seagate’s SED models comply with the standards published by the TCG.  
To use the security features in the drive, the host must be capable of constructing and issuing the following two SCSI  
commands:  
• Security Protocol Out  
• Security Protocol In  
These commands are used to convey the TCG protocol to and from the drive in their command payloads.  
8.1  
DATA ENCRYPTION  
Encrypting drives use one inline encryption engine for each port, employing AES-128 data encryption in Cipher Block  
Chaining (CBC) mode to encrypt all data prior to being written on the media and to decrypt all data as it is read from the  
media. The encryption engines are always in operation, cannot be disabled, and do not detract in any way from the  
performance of the drive.  
The 32-byte Data Encryption Key (DEK) is a random number which is generated by the drive, never leaves the drive, and is  
inaccessible to the host system. The DEK is itself encrypted when it is stored on the media and when it is in volatile  
temporary storage (DRAM) external to the encryption engine. A unique data encryption key is used for each of the drive's  
8.2  
CONTROLLED ACCESS  
The drive has two security partitions (SPs) called the "Admin SP" and the "Locking SP." These act as gatekeepers to the  
drive security services. Security-related commands will not be accepted unless they also supply the correct credentials to  
prove the requester is authorized to perform the command.  
8.2.1 Admin SP  
Admin SP is available using the SID (Secure ID) password or the MSID (Makers Secure ID) password.  
8.2.2 Locking SP  
The Locking SP controls read/write access to the media and the cryptographic erase feature. Access to the Locking SP is  
available using the BandMasterX or EraseMaster passwords. Since the drive owner can define up to 16 data bands on the  
drive, each data band has its own password called BandMasterX where X is the number of the data band (0 through 15).  
8.2.3 Default password  
When the drive is shipped from the factory, all passwords are set to the value of MSID. This 32-byte random value is printed  
on the drive label and it can be read by the host electronically over the I/O. After receipt of the drive, it is the responsibility of  
the owner to use the default MSID password as the authority to change all other passwords to unique owner-specified  
values.  
8.3  
RANDOM NUMBER GENERATOR (RNG)  
The drive has a 32-byte hardware RNG that it is uses to derive encryption keys or, if requested to do so, to provide random  
numbers to the host for system use, including using these numbers as Authentication Keys (passwords) for the drive’s  
Admin and Locking SPs.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
31  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                                                       
8.4  
DRIVE LOCKING  
the individual bands.  
The variable "LockOnReset" should be set to "PowerCycle" to ensure that the data bands will be locked if power is lost. This  
scenario occurs if the drive is removed from its cabinet. The drive will not honor any data read or write requests until the  
bands have been unlocked. This prevents the user data from being accessed without the appropriate credentials when the  
drive has been removed from its cabinet and installed in another system.  
When the drive is shipped from the factory, the firmware download port is locked and the drive will reject any attempt to  
download new firmware. The drive owner must use the SID credential to unlock the firmware download port before firmware  
updates will be accepted.  
8.5  
DATA BANDS  
When shipped from the factory, the drive is configured with a single data band called Band 0 (also known as the Global Data  
Band) which comprises LBA 0 through LBA max. The host may allocate Band1 by specifying a start LBA and an LBA range.  
The real estate for this band is taken from the Global Band. An additional 14 Data Bands may be defined in a similar way  
(Band2 through Band15) but before these bands can be allocated LBA space, they must first be individually enabled using  
the EraseMaster password.  
Data bands cannot overlap but they can be sequential with one band ending at LBA (x) and the next beginning at LBA (x+1).  
Each data band has its own drive-generated encryption key and its own user-supplied password. The host may change the  
8.6  
CRYPTOGRAPHIC ERASE  
A significant feature of SEDs is the ability to perform a cryptographic erase. This involves the host telling the drive to change  
the data encryption key for a particular band. Once changed, the data is no longer recoverable since it was written with one  
key and will be read using a different key. Since the drive overwrites the old key with the new one, and keeps no history of  
key changes, the user data can never be recovered. This is tantamount to an instantaneous data erase and is very useful if  
the drive is to be scrapped or redispositioned.  
8.7  
AUTHENTICATED FIRMWARE DOWNLOAD  
In addition to providing a locking mechanism to prevent unwanted firmware download attempts, the drive also only accepts  
download files which have been cryptographically signed by the appropriate Seagate Design Center.  
Three conditions must be met before the drive will allow the download operation:  
1. The download must be an SED file. A standard (base) drive (non-SED) file will be rejected.  
2. The download file must be signed and authenticated.  
3. As with a non-SED drive, the download file must pass the acceptance criteria for the drive. For example it must be appli-  
cable to the correct drive model, and have compatible revision and customer status.  
8.8  
POWER REQUIREMENTS  
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion  
of the drive controller ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V  
supply of about 30mA and a commensurate increase of about 150mW in power consumption. There is no additional drain on  
8.9  
SUPPORTED COMMANDS  
The SED models support the following two commands in addition to the commands supported by the standard (non-SED)  
models as listed in Table 9:  
• Security Protocol Out (B5h)  
• Security Protocol In (A2h)  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
32  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                             
9.0 DEFECT AND ERROR MANAGEMENT  
Seagate continues to use innovative technologies to manage defects and errors. These technologies are designed to  
increase data integrity, perform drive self-maintenance, and validate proper drive operation.  
SCSI defect and error management involves drive internal defect/error management and SAS system error considerations  
(errors in communications between the initiator and the drive). In addition, Seagate provides the following technologies used  
to increase data integrity and drive reliability:  
• Background Media Scan (see Section 9.4)  
• Media Pre-Scan (see Section 9.5)  
• Deferred Auto-Reallocation (see Section 9.6)  
• Idle Read After Write (see Section 9.7)  
The read error rates and specified storage capacities are not dependent on host (initiator) defect management routines.  
9.1  
DRIVE INTERNAL DEFECTS/ERRORS  
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.  
Details of the SCSI commands supported by the drive are described in the SAS Interface Manual. Also, more information on  
the drive Error Recovery philosophy is presented in the SAS Interface Manual.  
9.2  
DRIVE ERROR RECOVERY PROCEDURES  
When 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 previously set in the Error Recovery  
Parameters mode page. Error recovery and defect management may involve using several SCSI commands described in  
the SAS Interface Manual. The drive implements selectable error recovery time limits required in video applications.  
The error recovery scheme supported by the drive provides a way 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 using 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 using the Read Retry Count or Write Retry Count bytes in the Error  
Recovery mode page.  
The drive firmware error recovery algorithms consists of 13 levels for read recoveries and five levels for write. Each level  
may consist of multiple steps, where a step is defined as a recovery function involving a single re-read or re-write attempt.  
The maximum level used by the drive in LBA recovery is determined by the read and write retry counts.  
Table 6 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. 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.  
When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still perform data  
recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and Recovery Time Limit parameters.  
However, the drive does not report any unrecovered errors  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
33  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
Table 6 Read and write retry count maximum recovery times [1]  
WRITE  
READ RETRY MAXIMUM RECOVERY TIME PER LBA  
MAXIMUM RECOVERY TIME PER LBA  
(CUMULATIVE, MSEC)  
RETRY  
COUNT  
(CUMULATIVE, MSEC)  
COUNT  
0
51.87  
0
23.94  
35.91  
39.9  
1
59.85  
1
2
203.49  
231.42  
295.26  
327.18  
359.10  
446.88  
538.65  
570.57  
598.50  
1,534.97  
2
3
3
51.87  
79.8  
4
4
5
5 (default)  
107.73  
6
7
8
9
10  
11 (default)  
[1] These values are subject to change.  
Setting these retry counts to a value below the default setting could result in degradation of the 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 253.11 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 Recov-  
ery Time Limit field to 00 01.  
9.3  
SAS SYSTEM ERRORS  
Information on the reporting of operational errors or faults across the interface is given in the SAS Interface Manual. The  
SSP Response 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 SAS Interface Manual. Status reporting plays a role in systems  
error management and its use in that respect is described in sections where the various commands are discussed.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
34  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
9.4  
BACKGROUND MEDIA SCAN  
Background Media Scan (BMS) is a self-initiated media scan. BMS is defined in the T10 document SPC-4 available from the  
T10 committee. BMS performs sequential reads across the entire pack of the media while the drive is idle. In RAID arrays,  
BMS allows hot spare drives to be scanned for defects prior to being put into service by the host system. On regular duty  
drives, if the host system makes use of the BMS Log Page, it can avoid placing data in suspect locations on the media.  
Unreadable and recovered error sites will be logged or reallocated per ARRE/AWRE settings.  
With BMS, the host system can consume less power and system overhead by only checking BMS status and results rather  
than tying up the bus and consuming power in the process of host-initiated media scanning activity.  
Since the background scan functions are only done during idle periods, BMS causes a negligible impact to system  
performance. The first BMS scan for a newly manufactured drive is performed as quickly as possible to verify the media and  
protect data by setting the “Start time after idle” to 5ms, all subsequent scans begin after 500ms of idle time. Other features  
that normally use idle time to function will function normally because BMS functions for bursts of 800ms and then suspends  
activity for 100ms to allow other background functions to operate.  
BMS interrupts immediately to service host commands from the interface bus while performing reads. BMS will complete any  
BMS-initiated error recovery prior to returning to service host-initiated commands. Overhead associated with a return to host-  
servicing activity from BMS only impacts the first command that interrupted BMS, this results in a typical delay of about 1 ms.  
9.5  
MEDIA PRE-SCAN  
Media Pre-Scan is a feature that allows the drive to repair media errors that would otherwise have been found by the host  
system during critical data accesses early in the drive’s life. The default setting for Media Pre-Scan is enabled on standard  
products. Media Pre-Scan checks each write command to determine if the destination LBAs have been scanned by BMS. If  
the LBAs have been verified, the drive proceeds with the normal write command. If the LBAs have not been verified by BMS,  
Pre-Scan will convert the write to a write verify to certify that the data was properly written to the disk.  
Note. During Pre-Scan write verify commands, write performance may decrease by 50% until Pre-Scan completes.  
Write performance testing should be performed after Pre-Scan is complete. This may be checked by reading the  
BMS status.  
To expedite the scan of the full pack and subsequently exit from the Pre-Scan period, BMS will begin scanning immediately  
when the drive goes to idle during the Pre-Scan period. In the event that the drive is in a high transaction traffic environment  
and is unable to complete a BMS scan within 24 power on hours BMS will disable Pre-Scan to restore full performance to the  
system.  
9.6  
DEFERRED AUTO-REALLOCATION  
Deferred Auto-Reallocation (DAR) simplifies reallocation algorithms at the system level by allowing the drive to reallocate  
unreadable locations on a subsequent write command. Sites are marked for DAR during read operations performed by the  
drive. When a write command is received for an LBA marked for DAR, the auto-reallocation process is invoked and attempts  
to rewrite the data to the original location. If a verification of this rewrite fails, the sector is re-mapped to a spare location.  
This is in contrast to the system having to use the Reassign Command to reassign a location that was unreadable and then  
generate a write command to rewrite the data. DAR is most effective when AWRE and ARRE are enabled—this is the default  
setting from the Seagate factory. With AWRE and ARRE disabled DAR is unable to reallocate the failing location and will  
report an error sense code indicating that a write command is being attempted to a previously failing location.  
9.7  
IDLE READ AFTER WRITE  
Idle Read After Write (IRAW) utilizes idle time to verify the integrity of recently written data. During idle periods, no active  
system requests, the drive reads recently written data from the media and compares it to valid write command data resident  
in the drives data buffer. Any sectors that fail the comparison result in the invocation of a rewrite and auto-reallocation  
process. The process attempts to rewrite the data to the original location. If a verification of this rewrite fails, the sector is re-  
mapped to a spare location.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
35  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                     
10.0 INSTALLATION  
Cheetah 15K.7 disk drive installation is a plug-and-play process. There are no jumpers, switches, or terminators on the drive.  
SAS drives are designed to be used in a host system that provides a SAS-compatible backplane with bays designed to  
accommodate the drive. In such systems, the host system typically provides a carrier or tray into which you need to mount  
the drive. Mount the drive to the carrier or tray provided by the host system using four 6-32 UNC screws. Do not over-tighten  
or force the screws. You can mount the drive in any orientation.  
Note. SAS drives are designed to be attached to the host system without I/O or power cables. If you intend the use the  
drive in a non-backplane host system, connecting the drive using high-quality cables is acceptable as long as the  
I/O cable length does not exceed 4 meters (13.1 feet).  
Slide the carrier or tray into the appropriate bay in your host system using the instructions provided by the host system. This  
connects the drive directly to your system’s SAS connector. The SAS connector is normally located on a SAS backpanel.  
Power is supplied through the SAS connector.  
The drive is shipped from the factory low-level formatted in 512-byte logical blocks. You need to reformat the drive only if you  
want to select a different logical block size.  
10.1 DRIVE ORIENTATION  
The drive may be mounted in any orientation. All drive performance characterizations, however, have been done with the  
drive in horizontal (disks level) and vertical (drive on its side) orientations, which are the two preferred mounting orientations.  
10.2 COOLING  
Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will  
The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and head and disk  
assembly (HDA). You should confirm that adequate heat removal is provided using the temperature measurement guidelines  
the drive should be oriented, or air flow directed, so that the least amount of air flow resistance is created while providing air  
flow to the electronics and HDA. Also, the shortest possible path between the air inlet and exit should be chosen to minimize  
the travel length of air heated by the drive and other heat sources within the rack, cabinet, or drawer environment.  
If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 11. The air-flow patterns are  
created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction, convection, or other  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
36  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                   
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 11. Air flow  
10.3 DRIVE MOUNTING  
Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure that you do  
not physically distort the drive by attempting to mount it on a stiff, non-flat 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 X = F < 15lb = 67N  
where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion (units in 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.  
10.4 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 electrically 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 mounting 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.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
37  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                             
11.0 INTERFACE REQUIREMENTS  
This section partially describes the interface requirements as implemented on Cheetah 15K.7 drives. Additional information  
is provided in the SAS Interface Manual (part number 100293071).  
11.1 SAS FEATURES  
This section lists the SAS-specific features supported by Cheetah 15K.7 drives.  
11.1.1 task management functions  
Table 7 SAS task management functions supported  
TASK NAME  
Abort Task  
SUPPORTED  
Yes  
Clear ACA  
Yes  
Clear task set  
Abort task set  
Logical Unit Reset  
Query Task  
Yes  
Yes  
Yes  
Yes  
11.1.2 task management responses  
Table 8 Task management response codes  
FUNCTION NAME  
Function complete  
Invalid frame  
RESPONSE CODE  
00  
02  
04  
05  
08  
09  
Function not supported  
Function failed  
Function succeeded  
Invalid logical unit  
11.2 DUAL PORT SUPPORT  
Cheetah 15K.7 SAS drives have two independent ports. These ports may be connected in the same or different SCSI  
domains. Each drive port has a unique SAS address.  
The two ports have the capability of independent port clocking (e.g. both ports can run at 6Gbit/sec or the first port can run at  
6Gbit/sec while the second port runs at 3Gbit/sec.) The supported link rates are 1.5, 3.0, or 6.0 Gbits/sec.  
Subject to buffer availability, the Cheetah 15K.7 drives support:  
• Concurrent port transfers—The drive supports receiving COMMAND, TASK management transfers on both ports at the  
same time.  
Full duplex—The drive supports sending XFER_RDY, DATA and RESPONSE transfers while receiving frames on both ports.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
38  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                     
11.3 SCSI COMMANDS SUPPORTED  
Table 9 lists the SCSI commands supported by Cheetah 15K.7 drives.  
Table 9 Commands supported by Cheetah 15K.7 SAS family drives  
Command name  
Command code  
Supported  
Change Definition  
40h  
39h  
18h  
3Ah  
04h  
N
N
N
N
Y
N
Y
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
N
Y
Y
N
N
N
Y
N
N
Y
Y
N
N
Y
Y
Y
N
Y
Y
Compare  
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  
36h  
4Ch  
Log Select  
PCR bit  
DU bit  
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)  
Background Medium Scan page (15h)  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
39  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Table 9 Commands supported by Cheetah 15K.7 SAS family drives (continued)  
Command name  
Command code  
Supported  
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  
N
Y
Y
Y
15h  
55h  
1Ah  
Y [2]  
Y
Y [2]  
Y
Caching Parameters page (08h)  
Control Mode page (0Ah)  
Disconnect/Reconnect (02h)  
Error Recovery page (01h)  
Format page (03h)  
Y
Y
Y
Y
Information Exceptions Control page (1Ch)  
Background Scan mode subpage (01h)  
Notch and Partition Page (0Ch)  
Protocol-Specific Port page (19h)  
Power Condition page (1Ah)  
Rigid disk Drive Geometry page (04h)  
Unit Attention page (00h)  
Verify Error Recovery page (07h)  
Xor Control page (10h)  
Y
Y
N
Y
Y
Y
Y
Y
N
Y
Mode Sense (10) (same pages as Mode Sense 1Ah)  
Prefetch  
5Ah  
34h  
08h  
3Ch  
25h  
37h  
B7h  
28h  
N
Y
Read  
Read Buffer (modes 0, 2, 3, Ah and Bh supported)  
Read Capacity  
Y
Y
Read Defect Data (10)  
Y
Read Defect Data (12)  
Y
Read Extended  
Y
DPO bit supported  
Y
FUA bit supported  
Y
Read Long  
3Eh  
07h  
1Ch  
Y
Reassign Blocks  
Y
Receive Diagnostic Results  
Supported Diagnostics pages (00h)  
Translate page (40h)  
Y
Y
Y
Release  
17h  
57h  
03h  
Y
Release (10)  
Y
Request Sense  
Y
Actual Retry Count bytes  
Extended Sense  
Y
Y
Field Pointer bytes  
Y
Reserve  
16h  
Y
3rd Party Reserve  
Y
Extent Reservation  
N
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
40  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Table 9 Commands supported by Cheetah 15K.7 SAS family drives (continued)  
Command name  
Reserve (10)  
Command code  
Supported  
56h  
Y
Y
N
Y
N
N
N
Y
Y
Y
Y
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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  
2Fh  
Start Unit/Stop Unit (spindle ceases rotating)  
Synchronize Cache  
Test Unit Ready  
Verify  
BYTCHK bit  
Write  
0Ah  
2Eh  
Write and Verify  
DPO bit  
Write Buffer (modes 0, 2, supported)  
3Bh  
2Ah  
Firmware Download option  
Write Extended  
DPO bit  
Y
Y
Y
Y
Y
N
N
N
N
N
FUA bit  
Write Long  
Write Same  
PBdata  
3Fh  
41h  
LBdata  
XDRead  
XDWrite  
52h  
50h  
51h  
XPWrite  
[1] Cheetah 15K.7 drives can format to 512, 520, 524, or 528 bytes per logical block.  
[2] Warning. Power loss during flash programming can result in firmware corruption. This usually makes the drive inopera-  
ble.  
[3] Reference Mode Sense command 1Ah for mode pages supported.  
[4] Y = Yes. Command is supported.  
N = No. Command is not supported.  
A = Support is available on special request.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
41  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
11.3.1 Inquiry data  
Table lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface  
Manual.  
Table 10 Cheetah 15K.7 inquiry data  
BYTES  
DATA (HEX)  
0-15  
00  
[53  
R#  
00  
00  
00  
00  
00  
54  
R#  
00  
00  
00  
43  
xx**  
33  
12  
36  
R#  
00  
00  
00  
70  
20  
68  
8B  
30  
S#  
00  
00  
00  
79  
53  
74  
00  
30  
S#  
00  
00  
00  
72  
65  
73  
PP  
30  
S#  
00  
00  
00  
69  
61  
20  
02  
35  
S#  
00  
00  
00  
67  
67  
72  
53  
37  
S#  
00  
00  
00  
68  
61  
65  
45  
53  
S#  
00  
00  
00  
74  
74  
73  
41  
53]  
S#  
00  
00  
00  
20  
65  
65  
47  
20  
S#  
00  
00  
00  
28  
20  
72  
41  
20  
00  
00  
00  
00  
63  
41  
76  
54  
20  
00  
00  
00  
00  
29  
6C  
65  
45  
20  
00  
00  
00  
00  
20  
6C  
64  
20  
20  
00  
00  
00  
00  
Vendor ID  
Product ID  
1
16-31  
32-47  
48-63  
64-79  
80-95  
96-111  
112-127  
128-143  
R#  
00  
00  
00  
6F  
32* *Copyright  
30* 30* 39*  
72 69 67  
20  
20  
notice  
*
Copyright year (changes with actual year).  
**  
SCSI Revision support. Refer to the appropiate SPC release documentation for definitions.  
PP 10 = Inquiry data for an Inquiry command received on Port A.  
30 = Inquiry data for an Inquiry command received on Port B.  
R# Four ASCII digits representing the last four digits of the product firmware release number.  
S# Eight ASCII digits representing the eight digits of the product serial number.  
[ ]  
Bytes 18 through 26 reflect model of drive. The table above shows the hex values for Model ST3600057SS.  
11.3.2 Mode Sense data  
The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The drive  
maintains four sets of mode parameters:  
1. Default values  
Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the drive’s PCB.  
These default values can be changed only by downloading a complete set of new firmware into the flash E-PROM. 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.  
2. Saved values  
Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that are allowed to  
be changed can be changed by this method. Parameters in the saved values list that are not changeable by the Mode  
Select command get their values from default values storage.  
When power is applied to the drive, it takes saved values from the media and stores them as current values in volatile  
memory. It is not possible to change the current values (or the saved values) with a Mode Select command before the  
drive achieves operating speed and is “ready.” An attempt to do so results in a “Check Condition” status.  
On drives requiring unique saved values, the required unique saved values are stored into the saved values storage  
location on the media prior to shipping the drive. Some drives may have unique firmware with unique default values also.  
On standard OEM drives, the saved values are taken from the default values list and stored into the saved values stor-  
age location on the media prior to shipping.  
3. Current values  
Current values are volatile values being used by the drive to control its operation. A Mode Select command can be used  
to change the values identified as changeable values. Originally, current values are installed from saved or default val-  
ues after a power on reset, hard reset, or Bus Device Reset message.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
42  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
4. Changeable values  
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 (1) indicates the value can be changed. A zero (0) indicates  
the value is not changeable. For example, in Table 11.3.2.1, refer to Mode page 81, in the row entitled “CHG.” These are  
hex numbers representing the changeable values for Mode page 81. Note in columns 5 and 6 (bytes 04 and 05), there is  
00h which indicates that in bytes 04 and 05 none of the bits are changeable. Note also that bytes 06, 07, 09, 10, and 11  
are not changeable, because those fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111111.  
If there is a zero in any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are  
ones, all of these bits are changeable.  
The changeable values list can only be changed by downloading new firmware into the flash E-PROM.  
Note. Because there are often 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 command pages  
for SCSI implementation (see the SAS Interface Manual).  
Definitions:  
DEF = Default value. Standard OEM drives are shipped configured this way.  
CHG = Changeable bits; indicates if default value is changeable.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
43  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11.3.2.1 600GBmodel Mode Sense data  
MODE DATA HEADER:  
01 6e 00 10 00 00 00 08  
BLOCK DESCRIPTOR:  
45 dd 2f b0 00 00 02 00  
MODE PAGES:  
DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff  
CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00  
CHG 82 0e 00 00 00 00 00 00 00 00 ff ff 00 00 00 00  
DEF 83 16 bb d0 00 00 00 00 03 80 04 c4 02 00 00 01 00 c0 00 4c 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  
DEF 84 16 01 8a 9a 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 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  
DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff  
CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff  
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00  
DEF 8a 0a 02 00 00 00 00 00 00 00 19 00  
CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00  
DEF 18 06 06 00 00 00 00 00  
CHG 18 06 00 00 00 00 00 00  
DEF 99 06 06 00 07 d0 00 00  
CHG 99 06 10 00 ff ff ff ff  
DEF d9 01 00 64 00 06 00 02 00 00 00 00 10 29 0e 00 50 00 c5 00 00 68 64 a9 50 06 05 b0 00 29 2d d5 07 00 00 00 00 00 00 00 88 aa 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 01 00 00 10 29 0e 00 50 00 c5 00 00 68 64 aa 50 06 05 b0 00 29 2d d4 06 00 00 00 00 00 00 00 88 aa 00 00 00 00 00 00 00  
00 00 00 00 00 00 00  
CHG d9 01 00 64 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0 f0 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0 f0 00 00 00 00 00 00 00 00  
00 00 00 00 00 00  
DEF 59 02 00 0c 00 06 03 e8 00 00 00 00 00 00 00 00  
CHG 59 02 00 0c 00 00 ff ff 00 00 00 00 00 00 00 00  
DEF 59 03 00 2c 00 06 00 02 00 00 00 10 80 ac 00 01 80 ac 00 01 00 00 00 00 00 00 09 00 00 01 00 10 80 ac 00 01 80 ac 00 01 00 00 00 00 00 00 09 00  
CHG 59 03 00 2c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
DEF 9a 0a 00 02 00 00 00 05 00 00 8c a0  
CHG 9a 0a 00 03 ff ff ff ff ff ff ff ff  
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  
DEF dc 01 00 0c 01 01 00 18 00 18 00 00 00 00 00 00  
CHG dc 01 00 0c 00 01 ff ff ff ff 00 00 00 00 00 00  
DEF 80 06 00 80 0f 00 00 00  
CHG 80 06 b7 c0 8f 00 00 00  
READ CAPACITY DATA:  
READ BUFFER  
0 1 2 3 4 5 6 7 8 9 A B C D E F  
ASCII  
000000: 45 DD 2F AF 00 00 02 00 __ __ __ __ __ __ __ __  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
44  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
11.3.2.2 450GB model Mode Sense data  
MODE DATA HEADER:  
01 76 00 10 00 00 00 08  
BLOCK DESCRIPTOR:  
34 65 f8 70 00 00 02 00  
MODE PAGES:  
DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff  
CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00  
CHG 82 0e 00 00 00 00 00 00 00 00 ff ff 00 00 00 00  
DEF 83 16 bb d0 00 00 00 00 03 80 04 c4 02 00 00 01 00 c0 00 4c 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  
DEF 84 16 01 8a 9a 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 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  
DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff  
CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff  
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00  
DEF 8a 0a 02 00 00 00 00 00 00 00 12 c0  
CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00  
DEF 18 06 06 00 00 00 00 00  
CHG 18 06 00 00 00 00 00 00  
DEF 99 0e 06 00 07 d0 00 00 00 00 00 00 00 00 00 00  
CHG 99 0e 10 00 ff ff ff ff 00 00 00 00 00 00 00 00  
DEF d9 01 00 64 00 06 00 02 00 00 00 00 10 29 0e 00 50 00 c5 00 00 15 4b 65 50 06 05 b0 00 29 28 55 07 00 00 00 00 00 00 00 88 aa 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 01 00 00 10 29 0e 00 50 00 c5 00 00 15 4b 66 50 06 05 b0 00 29 28 54 06 00 00 00 00 00 00 00 88 aa 00 00 00 00 00 00 00  
00 00 00 00 00 00 00  
CHG d9 01 00 64 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0 f0 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0 f0 00 00 00 00 00 00 00 00  
00 00 00 00 00 00  
DEF 59 02 00 0c 00 06 03 e8 00 00 00 00 00 00 00 00  
CHG 59 02 00 0c 00 00 ff ff 00 00 00 00 00 00 00 00  
DEF 59 03 00 2c 00 06 00 02 00 00 00 10 80 ac 00 01 80 ac 00 01 00 00 00 00 00 00 09 00 00 01 00 10 80 ac 00 01 80 ac 00 01 00 00 00 00 00 00 09 00  
CHG 59 03 00 2c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
DEF 9a 0a 00 02 00 00 00 05 00 00 8c a0  
CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00  
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  
DEF dc 01 00 0c 01 01 00 18 00 18 00 00 00 00 00 00  
CHG dc 01 00 0c 00 01 ff ff ff ff 00 00 00 00 00 00  
DEF 80 06 00 80 0f 00 00 00  
CHG 80 06 b7 c0 8f 00 00 00  
READ CAPACITY DATA:  
READ BUFFER  
0 1 2 3 4 5 6 7 8 9 A B C D E F  
000000: 34 65 F8 6F 00 00 02 00  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
45  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11.3.2.3 300GB model Mode Sense data  
MODE DATA HEADER:  
01 76 00 10 00 00 00 08  
BLOCK DESCRIPTOR:  
22 ec b2 5c 00 00 02 00  
MODE PAGES:  
DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff  
CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00  
CHG 82 0e 00 00 00 00 00 00 00 00 ff ff 00 00 00 00  
DEF 83 16 bb d0 00 00 00 00 03 80 04 c4 02 00 00 01 00 c0 00 4c 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  
DEF 84 16 01 8a 9a 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 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  
DEF 87 0a 00 0b ff 00 00 00 00 00 ff ff  
CHG 87 0a 0f ff 00 00 00 00 00 00 ff ff  
DEF 88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
CHG 88 12 a5 00 00 00 ff ff ff ff 00 00 20 00 00 00 00 00 00 00  
DEF 8a 0a 02 00 00 00 00 00 00 00 0c 80  
CHG 8a 0a 03 f0 00 00 00 00 00 00 00 00  
DEF 18 06 06 00 00 00 00 00  
CHG 18 06 00 00 00 00 00 00  
DEF 99 0e 06 00 07 d0 00 00 00 00 00 00 00 00 00 00  
CHG 99 0e 10 00 ff ff ff ff 00 00 00 00 00 00 00 00  
DEF d9 01 00 64 00 06 00 02 00 00 00 00 14 0a 0e 00 50 00 c5 00 00 5f 66 d5 50 00 00  
00 80 00 00 00 01 00 00 00 00 00 00 00 88 aa 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
00 01 00 00 14 2a 0e 00 50 00 c5 00 00 5f 66 d6 50 00 00 00 80 00 00 01 03 00 00 00 00  
00 00 00 88 aa 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG d9 01 00 64 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 00 00 00 00 f0 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
00 00 00 f0 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
DEF 59 02 00 0c 00 06 03 e8 00 00 00 00 00 00 00 00  
CHG 59 02 00 0c 00 00 ff ff 00 00 00 00 00 00 00 00  
DEF 59 03 00 2c 00 06 00 02 00 00 00 10 80 ac 00 01 80 ac 00 01 80 a8 00 00 00 00 0a 00 00 01 00 10 80 ac 00 01 80 ac 00 01 80 a8 00 00 00  
00 0a 00  
CHG 59 03 00 2c 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
00 00 00 00  
DEF 9a 0a 00 02 00 00 00 05 00 00 8c a0  
CHG 9a 0a 00 03 ff ff ff ff 00 00 00 00  
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  
DEF dc 01 00 0c 01 01 00 18 00 18 00 00 00 00 00 00  
CHG dc 01 00 0c 00 01 ff ff ff ff 00 00 00 00 00 00  
DEF 80 06 00 80 0f 00 00 00  
CHG 80 06 b7 c0 8f 00 00 00  
READ CAPACITY DATA:  
READ BUFFER  
0 1 2 3 4 5 6 7 8 9 A B C D E F  
ASCII  
00000: 22 EC B2 5B 00 00 02 00 __ __ __ __ __ __ __ __  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
46  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11.4 MISCELLANEOUS OPERATING FEATURES AND CONDITIONS  
“N” in the support column indicates the feature or condition is not supported.  
Table 11 Miscellaneous features  
Supported  
Feature or condition  
N
N
N
Y
N
Y
Y
Y
Y
N
Y
Automatic contingent allegiance  
Asynchronous event notification  
Synchronized (locked) spindle operation  
Segmented caching  
Zero latency read  
Queue tagging (up to 64 queue tags supported)  
Deferred error handling  
Parameter rounding (controlled by Round bit in Mode Select page 0)  
Reporting actual retry count in Extended Sense bytes 15, 16, and 17  
Adaptive caching  
SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes  
Table 12 Miscellaneous status  
Supported  
Status  
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Good  
Check condition  
Condition met/good  
Busy  
Intermediate/good  
Intermediate/condition met/good  
Reservation conflict  
Task set full  
ACA active  
ACA active, faulted initiator  
11.4.1 SAS physical interface  
Details of the physical, electrical, and logical characteristics are provided within this section. The operational aspects of  
Seagate’s SAS drives are provided in the SAS Interface Manual..  
SAS Interface  
connector  
Figure 12.  
Physical interface  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
47  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                                                     
0.80 (6X)  
5.92  
7.62  
4.65  
0.52 0.08 x 45  
2.00 (3X)  
0.45 0.03 (7X)  
0.10 M E  
5.08  
42.73 REF.  
41.13 0.15  
0.20B  
0.30 0.05 (2X)  
C
A
B
1.10  
4.00 0.08  
0.15D  
C OF DATUM D  
L
R0.30 0.08 (4X)  
A
0.30 0.05 (4X)  
B
C
SEE Detail1  
B
33.43 0.05  
15.875  
15.875  
1.27 (14X)  
1.27 (6X)  
0.84 0.05 (22X)  
5.08  
0.15B  
4.90 0.08  
0.35MIN  
P15  
S1  
P1  
S7  
C OF DATUM B  
L
Figure 13. SAS connector dimensions  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
48  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Detail A  
6.10  
S14  
S8  
0.30 0.05 x 45 (5X)  
2.25 0.05  
0.40 0.05 X 45 (3X)  
4.85 0.05  
0.10B  
CORING ALLOWED  
IN THIS AREA.  
E
4.40 0.15  
R0.30 0.08  
45  
C
SEE Detail 2  
1.95 0.08  
A
0.35 0.05  
SECTION C - C  
3.90 0.15  
SECTION A - A  
CONTACT SURFACE FLUSH  
TO DATUM A 0.03  
0.08 0.05  
65  
1.90 0.08  
1.23 0.05  
0.08 0.05  
30  
Detail 2  
2.40 0.08  
0.10 A  
SECTION B - B  
D
Figure 14. SAS connector dimensions  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
49  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
11.4.2 Physical characteristics  
This section defines physical interface connector.  
11.4.3 Connector requirements  
The SAS connector on the drive complies with SFF-8482. Contact your preferred connector manufacturer for mating part  
information.  
11.4.4 Electrical description  
SAS drives use the device connector for:  
• DC power  
• SAS interface  
• Activity LED  
This connector is designed to either plug directly into a backpanel or accept cables.  
11.4.5 Pin descriptions  
This section provides a pin-out of the SAS device and a description of the functions provided by the pins.  
Table 13 SAS pin descriptions  
PIN  
S1  
SIGNAL NAME  
Port A Ground  
+Port A_in  
SIGNAL TYPE  
PIN  
P1*  
P2*  
P3  
SIGNAL NAME  
NC (reserved 3.3Volts)  
NC (reserved 3.3Volts)  
NC (reserved 3.3Volts)  
Ground  
SIGNAL TYPE  
S2*  
S3*  
S4  
Diff. input pair  
-Port A_in  
Port A Ground  
-Port A_out  
P4  
S5*  
S6*  
S7  
Diff output pair  
P5  
Ground  
+Port A_out  
Port A Ground  
Port B Ground  
+Port B_in  
P6  
Ground  
P7  
5 Volts charge  
5 Volts  
S8  
P8*  
P9*  
P10  
P11*  
P12  
P13  
P14*  
P15*  
S9*  
S10*  
S11  
S12*  
S13*  
S14  
Diff. input pair  
Diff output pair  
5 Volts  
-Port B_in  
Ground  
Port A Ground  
-Port B_out  
Ready LED  
Ground  
Open collector out  
+Port B_out  
Port B Ground  
12 Volts charge  
12 Volts  
12 Volts  
* - Short pin to support hot plugging  
NC - No connection in the drive.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
50  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                           
11.4.6 SAS transmitters and receivers  
ground shift noise.  
Figure 15. SAS transmitters and receivers  
11.4.7 Power  
The drive receives power (+5 volts and +12 volts) through the SAS device connector.  
Three +12 volt pins provide power to the drive, 2 short and 1 long. The current return for the +12 volt power supply is through  
the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins.  
Three +5 volt pins provide power to the drive, 2 short and 1 long. The current return for the +5 volt power supply is through  
the common ground pins. The supply current and return current must be distributed as evenly as possible among the pins.  
Current to the drive through the long power pins may be limited by the system to reduce inrush current to the drive during hot  
plugging.  
11.5 SIGNAL CHARACTERISTICS  
and signal name information.  
11.5.1 Ready LED Out  
Table 14 Ready LED Out conditions  
NORMAL COMMAND ACTIVITY  
Ready LED Meaning bit mode page 19h  
Spun down and no activity  
LED STATUS  
0
1
Off  
On  
On  
Off  
Off  
On  
Off  
On  
Spun down and activity (command executing)  
Spun up and no activity  
Spun up and activity (command executing)  
Spinning up or down  
Blinks steadily  
(50% on and 50% off, 0.5 seconds on and off for 0.5 seconds)  
Format in progress  
Toggles on/off  
Toggles on/off  
Write Same command in progress  
The Ready LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper +3.3 volt  
supply through an appropriate current limiting resistor. The LED and the current limiting resistor are external to the drive. See  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
51  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                               
Table 15 LED drive signal  
STATE  
TEST CONDITION  
OUTPUT VOLTAGE  
LED off, high  
LED on, low  
0 V VOH 3.6 V  
-100 μA < I < 100 μA  
OH  
I
= 15 mA  
0 VOL 0.225 V  
OL  
11.5.2 Differential signals  
The drive SAS differential signals comply with the intra-enclosure (internal connector) requirements of the SAS standard.  
Table 16 defines the general interface characteristics.  
Table 16 General interface characteristics  
CHARACTERISTIC  
UNITS  
1.5 GBPS  
3.0 GBPS  
6.0 GBPS  
Bit rate (nominal)  
Mbaud  
ps  
1,500  
666.6  
100  
3,000  
333.3  
100  
6,000  
166.6  
100  
Unit interval (UI)(nominal)  
Impedance (nominal, differential )  
Transmitter transients, maximum  
Receiver transients, maximum  
ohm  
V
1.2  
1.2  
1.2  
V
1.2  
1.2  
1.2  
11.6 SAS-2 SPECIFICATION COMPLIANCE  
Seagate SAS-2 drives are entirely compatible with the latest SAS-2 Specification (T10/1760-D) Revision 16.  
The most important characteristic of the SAS-2 drive at 6 Gbps is that the receiver is capable of adapting the equalizer to  
optimize the receive margins. The SAS-2 drive has two types of equalizers:  
1. A Decision Feedback Equalizer (DFE) which utilizes the standard SAS-2 training pattern transmitted during the SNW-3  
training gap. The DFE circuit can derive an optimal equalization characteristic to compensate for many of the receive  
losses in the system.  
2. A Feed Forward Equalizer (FFE) optimized to provide balanced receive margins over a range of channels bounded by  
the best and worst case channels as defined by the relevant ANSI standard.  
11.7 ADDITIONAL INFORMATION  
Please contact your Seagate representative for SAS electrical details, if required.  
For more information about the Phy, Link, Transport, and Applications layers of the SAS interface, refer to the Seagate SAS  
Interface Manual, part number 100293071.  
For more information about the SCSI commands used by Seagate SAS drives, refer to the Seagate SCSI Commands  
Reference Manual, part number 100293068.  
CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F  
52  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                   
INDEX  
check condition status 47  
chemical pollutants 28  
Cipher Block Chaining 31  
class B limit 3  
clear ACA function 38  
clear task set function 38  
commands supported 39  
condensation 25  
Numerics  
12 volt  
pins 51  
5 volt pins 51  
6 Gbps 52  
A
abort task set function 38  
AC coupling 51  
condition met/good status 47  
connector  
AC power requirements 18  
ACA active status 47  
ACA active, faulted initiator status 47  
acoustics 28  
active LED Out signal 51  
actuator  
assembly design 5  
adaptive caching 47  
Admin SP 31  
AES-128 data encryption 31  
AFR 7  
illustrated 50  
requirements 50  
continuous vibration 28  
cooling 36  
corrosive environment 28  
CRC  
error 12  
Cryptographic erase 32  
Current profiles 21  
customer service 17  
air cleanliness 28  
D
air flow 36  
DAR 35  
illustrated 37  
Data Bands 32  
data bands 31  
air inlet 36  
altitude 25  
Data encryption 31  
Data Encryption Key 31  
data heads  
ambient 24  
ambient temperature 36  
ANSI documents  
read/write 8  
data rate  
Serial Attached SCSI 4  
asynchronous event notification 47  
audible noise 3  
internal 8  
data transfer rate 9  
DC power 50  
auto write and read reallocation  
programmable 6  
requirements 18  
Decision Feedback Equalizer 52  
decrypt 31  
automatic contingent allegiance 47  
average idle current 18, 19, 20  
average rotational latency 8  
default MSID password 31  
defect and error management 33  
defects 33  
Deferred Auto-Reallocation 35  
deferred error handling 47  
DEK 31  
description 5  
DFE 52  
dimensions 29  
disk rotation speed 8  
drive 28  
B
Background Media Scan 35  
backpanel 50  
Band 0 32  
BandMasterX 31  
BMS 35  
buffer  
data 6  
space 10  
busy status 47  
drive characteristics 8  
Drive Locking 32  
drive mounting 29, 37  
drive select 50  
C
cache operation 10  
cache segments 10  
caching write data 11  
Canadian Department of Communications 3  
capacity  
dual port support 38  
E
unformatted 8  
electrical  
CBC 31  
description of connector 50  
Cheetah 15K.7 SAS Product Manual, Rev. F  
53  
Download from Www.Somanuals.com. All Manuals Search And Download.  
signal characteristics 51  
specifications 18  
electromagnetic compatibility 3  
electromagnetic susceptibility 29  
EMI requirements 3  
encryption engine 31  
encryption key 32  
environment 36  
inquiry data 42  
installation 36  
interface  
commands supported 39  
error rate 12  
errors 12  
illustrated 47  
physical 47  
environmental  
requirements 38  
limits 24  
intermediate/condition met/good status 47  
intermediate/good status 47  
internal data rate 8  
internal defects/errors 33  
internal drive characteristics 8  
IRAW 35  
requirements 12  
environmental control 28  
EraseMaster 31  
error  
management 33  
rates 12  
errors 33  
J
jumpers 36  
F
L
FCC rules and regulations 3  
features 6  
latency  
average rotational 8, 9  
interface 38  
Locking SP 31  
Federal Information Processing Standard 30  
feed forward equalizer 52  
FFE 52  
FIPS 30  
firmware 6  
LockOnReset 32  
logical block address 10  
logical block reallocation scheme 6  
logical block size 6, 9  
logical segments 10  
corruption 41  
firmware download port 32  
flawed sector reallocation 6  
Format command execution time 8  
function  
M
maintenance 12  
Makers Secure ID 31  
maximum delayed motor start 18, 19, 20  
maximum start current 18, 19, 20  
media description 6  
complete, code 00 38  
not supported, code 05 38  
reject, code 04 38  
Media Pre-Scan 35  
miscellaneous feature support  
Adaptive caching 47  
G
Global Data Band 32  
Good status 47  
gradient 24, 25  
ground shift noise 51  
grounding 37  
Asynchronous event notification 47  
Automatic contingent allegiance 47  
Deferred error handling 47  
Parameter rounding 47  
Queue tagging 47  
Reporting actual retry count 47  
Segmented caching 47  
SMP = 1 in Mode Select command 47  
Synchronized (locked) spindle operation 47  
Zero latency read 47  
H
HDA 36, 37  
heads  
read/write data 8  
heat removal 36  
heat source 36  
host equipment 37  
hot plugging the drive 13  
humidity 25  
miscellaneous status support  
ACA active 47  
ACA active, faulted initiator 47  
Busy 47  
Check condition 47  
humidity limits 24  
Condition met/good 47  
Good 47  
Intermediate/condition met/good 47  
I
Idle Read After Write 35  
Cheetah 15K.7 SAS Product Manual, Rev. F  
54  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Intermediate/good 47  
Reservation conflict 47  
Task set full 47  
miscorrected media data 12  
Mode sense  
data, table 42  
mounting 37  
holes 37  
orientations 36  
MSID 31  
Q
queue tagging 47  
R
radio interference regulations 3  
Random number generator 31  
RCD bit 10  
read error rates 12, 33  
read/write data heads 8  
receivers 51  
recommended mounting 27  
Recoverable Errors 12  
recovered media data 12  
reference  
N
noise  
audible 3  
noise immunity 21  
non-operating 25, 26, 28  
temperature 24  
non-operating vibration 28  
documents 4  
relative humidity 25  
reliability 7  
specifications 12  
reliability and service 12  
repair and return information 17  
reporting actual retry count 47  
reservation conflict status 47  
resonance 26  
return information 17  
RNG 31  
rotation speed 8  
O
office environment 28  
operating 25, 26, 27  
option selection 50  
out-of-plane distortion 37  
P
package size 26  
package test specification 4  
packaged 26  
parameter rounding 47  
password 31  
S
safety 3  
SAS  
interface 50  
passwords 31  
physical interface 47  
task management functions 38  
SAS documents 4  
SAS Interface Manual 3, 4  
SCSI interface  
commands supported 39  
Seagate Technology Support Services 1  
Secure ID 31  
security partitions 31  
Security Protocol In 31  
Security Protocol Out 31  
seek error  
PCBA 37  
peak bits per inch 8  
peak operating current 18, 19, 20  
peak-to-peak measurements 21  
performance characteristics  
detailed 8  
general 9  
performance degradation 26  
performance highlights 6  
physical damage 28  
physical dimensions 29  
physical interface 47  
physical specifications 18  
pin descriptions 50  
power 51  
defined 12  
rate 12  
seek performance characteristics 8  
seek time  
dissipation 23  
average typical 8  
requirements, AC 18  
requirements, DC 18  
sequencing 21  
full stroke typical 8  
single track typical 8  
segmented caching 47  
self-encrypting drives 31  
Self-Monitoring Analysis and Reporting Technology  
power distribution 3  
PowerCycle 32  
prefetch/multi-segmented cache control 9  
preventive maintenance 12  
protection of data at rest 31  
Serial Attached SCSI (SAS) Interface Manual 2  
shielding 3  
Cheetah 15K.7 SAS Product Manual, Rev. F  
55  
Download from Www.Somanuals.com. All Manuals Search And Download.  
shipping 17  
shipping container 24  
shock 26  
Z
zero latency read 47  
zone bit recording (ZBR) 6  
and vibration 26  
shock mount 37  
SID 31  
signal  
characteristics 51  
single-unit shipping pack kit 7  
SMART 7, 13  
SMP = 1 in Mode Select command 47  
SNW-3 training gap 52  
spindle brake 6  
standards 3  
start/stop time 9  
Sulfur 28  
surface stiffness  
allowable for non-flat surface 37  
switches 36  
synchronized spindle  
operation 47  
system chassis 37  
T
task management functions 38  
Abort task set 38  
Clear ACA 38  
Clear task set 38  
terminate task 38  
task management response codes 38  
Function complete 00 38  
Function not supported 05 38  
Function reject 04 38  
task set full status 47  
TCG 31  
temperature 24, 36  
limits 24  
non-operating 24  
regulation 3  
See also cooling  
terminate task function 38  
terminators 36  
tracks per inch 8  
transmitters 51  
transporting the drive 17  
Trusted Computing Group 31  
U
unformatted 7  
Unrecoverable Errors 12  
unrecovered media data 12  
V
vibration 26, 27, 28  
W
warranty 17  
Cheetah 15K.7 SAS Product Manual, Rev. F  
56  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Seagate Technology LLC  
AMERICAS Seagate Technology LLC 10200 South De Anza Boulevard, Cupertino, California 95014, United States, 408-658-1000  
ASIA/PACIFIC Seagate Singapore International Headquarters Pte. Ltd. 7000 Ang Mo Kio Avenue 5, Singapore 569877, 65-6485-3888  
EUROPE, MIDDLE EAST AND AFRICA Seagate Technology SAS 16-18 rue du Dôme, 92100 Boulogne-Billancourt, France, 33 1-4186 10 00  
Publication Number: 100516226, Rev. F  
December 2012  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Q Logic Computer Hardware Q L E 4 0 6 0 C User Guide
Quantum Wheelchair 06 edge va User Guide
Radio Shack Cordless Telephone TAD 728 User Guide
RCA Stereo System fm radio tuner User Guide
Ricoh Video Gaming Accessories G800SE User Guide
Rinnai Water Heater R98EASME User Guide
Roland Music Mixer VR 3 User Guide
Samsung Camcorder HMX H300BN HMX H300SN HMX H300RN HMX H300UN User Guide
Samsung CRT Television CL 29M30HS User Guide
Sennheiser Headphones HD 238 User Guide