Fujitsu MAS3735FC User Manual

C141-E198-02EN

MAS3735FC

MAS3367FC

DISK DRIVES

PRODUCT/MAINTENANCE MANUAL

Revision History

(1/1)

Revised section (*1)

(Added/Deleted/Altered)

Edition

Date

Details

2003.07.29

2003.10.07

—

Capacity notation is changed.

Misdescription is corrected.

•

Table 2.1, 2.2 and 3.2 are altered.

Table 2.3 is altered

*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.

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Preface

This manual describes the MAS3735FC and MAS3367FC (hereafter, MAS series),

3.5 type fixed disk drives with an embedded fibre channel controller.

This manual details the specifications and functions of the above disk drive, and gives the

requirements and procedures for installing it into a host computer system.

This manual is written for users who have a basic understanding of fixed disk drives and

their use in computer systems. The MANUAL ORGANIZATION section describes

organization and scope of this manual. The need arises, use the other manuals.

The organization of this manual, related reference manual and conventions for alert

messages follow.

Overview of Manual

This manual consists of the following seven chapters, glossary, and abbreviation:

Chapter 1 General Description

This chapter introduces the MAS series disk drives and discusses their standard features,

hardware, and system configuration.

Chapter 2 Specifications

This chapter gives detailed specifications of the MAS series disk drives and their

installation environment.

Chapter 3 Data Format

This chapter describes the data structure of the disk, the address method, and what to do

about media defects.

Chapter 4 Installation Requirements

This chapter describes the basic physical and electrical requirements for installing MAS

series disk drives.

Chapter 5 Installation

This chapter explains how to install MAS series disk drives. It includes the notice and

procedures for setting device number and operation modes, mounting the disk drive,

connecting the cables, and confirming drive operation.

Chapter 6 Diagnostics and Maintenance

This chapter describes the automatic diagnosis, and maintenance of MAS series disk drive.

This chapter also describes diagnostic methods for operation check and the basics of

troubleshooting the disk drives.

Chapter 7 Error Analysis

This chapter describes in details how collect the information for error analysis and how

analyze collected error information.

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Preface

APPENDIX A Connector Signal Allocation

The appendix gives supplementary information, including the signal assignments of

interface connectors.

Conventions for Alert Messages

This manual uses the following conventions to show the alert messages. An alert message

consists of an alert signal and alert statements. The alert signal consists of an alert symbol

and a signal word or just a signal word.

The following are the alert signals and their meanings:

This indicates a hazardous situation likely to result in

serious personal injury if the user does not perform the

procedure correctly.

This indicates a hazardous situation could result in serious

personal injury if the user does not perform the procedure

correctly.

This indicates a hazardous situation could result in minor

or moderate personal injury if the user does not perform

the procedure correctly. This alert signal also indicates

that damages to the product or other property, may occur if

the user does not perform the product correctly.

This indicates information that could help the user use the

product more efficiently.

In the text, the alert signal is centered, followed below by the indented message. A wider

line space precedes and follows the alert message to show where the alert message begins

and ends. The following is an example:

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Preface

(Example)

Data loss

For MAS series, Reed Solomon codes are applied for their ECC. The

sector-data is divided into 4 interleaving sectors, and ECC is performed in

each sector where the maximum number of errors (up to 5 byte) can be

corrected. [Total maximum byte: 5 byte × 4 ( interleave) = 20 byte]

If the error of read sector keeps allowable error byte number, correction is

performed. However, if error byte exceeds its allowable number,

correction may not be performed properly.

The main alert messages in the text are also listed in the “Important Alert Items.”

CONVENTIONS USED IN THIS MANUAL

The MAS3735FC and MAS3367FC disk drives are described as "the intelligent disk drive

(IDD)", "the drive" or "the device" in this manual.

Decimal number is represented normally.

Hexadecimal number is represented as X'17B9', 17B9h or 17B9H.

Binary number is represented as "010".

Attention

Please forward any comments you may have regarding this manual.

To make this manual easier for users to understand, opinions from readers are needed.

Please write your opinions or requests on the Comment at the back of this manual and

forward it to the address described in the sheet.

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Important Alert Items

Important Alert Messages

The important alert messages in this manual are as follows:

A hazardous situation could result in minor or moderate personal injury if the

user does not perform the procedure correctly. Also, damage to the product

or other property, may occur if the user does not perform the procedure

correctly.

Task

Alert message

Page

2-5

Data loss

Mounting Installation

For MAS series, Reed Solomon codes are applied for their ECC.

The sector-data is divided into 4 interleaving sectors, and ECC is

performed in each sector where the maximum number of errors (up

to 5 byte) can be corrected. [Total maximum byte: 5 byte × 4

(interleave) = 20 byte]

If the error of read sector keeps allowable error byte number,

correction is performed.

However, if error byte exceeds its allowable number, correction

may not be performed properly.

Hot temperature

5-1

To prevent injury, do not handle the drive until after the device has

cooled sufficiently after turning off the power. The DE and LSI

become hot during operation and remain hot immediately after

turning off the power.

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Important Alert Items

Task

Alert message

Page

5-5

Mounting Installation

Damage

1. When dismounting the drive which is mounted on the system

while power is supplied to it.

•

The drive to be dismounted must be separated from the

loop. Dismounting the drive which is not separated from

the loop may cause an unexpected error.

If the drive is not separated from the loop, issue an LPB to

the drive from the initiator in a primitive sequence of the

order set.

It is recommended to stop the spindle motor prior to this

loop separation operation. The spindle motor can be

stopped by a START/STOP command. It takes about 30

seconds for the spindle motor to stop completely.

•

Then, dismount the drive using the drive

mounting/dismounting mechanism, etc. of the system. If

the drive is dismounted while the spindle motor is running,

special care is required to avoid excessive vibration or

shock to the drive. It is recommended to stop the operation

once the SCA connector breaks off contact and wait until

the spindle motor stops (about 30 seconds) before dismount

the drive.

•

When storing or transporting the drive, put it in an

antistatic bag. (Shown in Section 5.1).

2. When dismounting the drive which is mounted on the system

while power is not supplied to it.

•

Do not move the drive until the drive stops completely

(about 30 seconds if the spindle motor was stopped by a

START/STOP UNIT command, and about 30 seconds after

powering-off when the power was simply turned off).

•

Then, dismount the drive using the drive

mounting/dismounting mechanism, etc. of the system.

When storing or transporting the drive, put it in an

antistatic bag. (Shown in Section 5.1).

Data loss

6-4

6-5

When the SEND DIAGNOSTIC command terminates with the

CHECK CONDITION status, the INIT must collect the error

information using the REQUEST SENSE command. The RECEIVE

DIAGNOSTIC RESULTS command cannot read out the error

information detected in the self-diagnostics.

Caution

1. To avoid injury, do not touch the mechanical assembly during

disk drive operation.

2. Do not use solvents to clean the disk drive.

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Important Alert Items

Task

Alert message

Page

6-6

Mounting Installation

Caution

1. Always ground yourself with a wrist strap connected to ground

before handling. ESD (Electrostatics Discharge) may cause

the damage to the device.

2. Do not remove a PCA. This operation is required to prevent

unexpected or unpredictable operation.

3. Do not use a conductive cleaner to clean a disk drive assembly.

Damage

6-6

6-7

Never open the disk enclosure in the field. Opening the disk

enclosure in the field may cause an irreparable fault.

Data loss

Save data stored on the disk drive before requesting repair. Fujitsu

does not assume responsibility if data is destroyed during servicing

or repair.

Damage

6-15

Never open the disk enclosure in the field. Opening the disk

enclosure may cause an irreparable fault.

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MANUAL ORGANIZATION

PRODUCT/

MAINTENANCE MANUAL

1. General Description

2. Specifications

3. Data Format

(This manual)

4. Installation Requirements

5. Installation

6. Diagnostics and Maintenance

7. Error Analysis

Fibre Channel

Interface

Specifications

1. Command Processing

2. Data Buffer Management

3. Command Specification

4. Sense Data and error Recovery Procedure

5. Disk Medium Management

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REFERENCED STANDARDS

The product specifications and functions described in this manual conform to the

following ANSI (*1) standards:

Document number

Title

NCITS TR-19

FIBRE CHANNEL PRIVATE LOOP SCSI DIRECT ATTATH (FC-PLDA)

FIBRE CHANNEL PHYSICAL AND SIGNALING INTERFACE (FC-PH)

FIBRE CHANNEL PHYSICAL AND SIGNALING INTERFACE-2 (FC-PH-2)

FIBRE CHANNEL ARBITRATED LOOP (FC-AL)

ANSI X3.230-1994

ANSI X3.297-1996

ANSI X3.272-199X

ANSI X3.269-199X

FIBRE CHANNEL PLOTOCOL FOR SCSI (SCSI-FCP)

*1 ANSI = American National Standards Institute

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

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CONTENTS

CHAPTER 1 General Description ..................................................................1-1

1.1 Standard Features....................................................................................1-2

1.2 Hardware Structure .................................................................................1-5

1.3 System Configuration..............................................................................1-7

CHAPTER 2 Specifications............................................................................2-1

2.1 Hardware Specifications .........................................................................2-1

2.1.1 Model name and order number.............................................................2-1

2.1.2 Function specifications .........................................................................2-2

2.1.3 Environmental specifications................................................................2-4

2.1.4 Error rate ...............................................................................................2-5

2.1.5 Reliability..............................................................................................2-5

CHAPTER 3 Data Format ...............................................................................3-1

3.1 Data Space...............................................................................................3-1

3.1.1 Cylinder configuration..........................................................................3-1

3.1.2 Alternate spare area...............................................................................3-4

3.1.3 Track format..........................................................................................3-5

3.1.4 Sector format.........................................................................................3-7

3.1.5 Format capacity.....................................................................................3-9

3.2 Logical Data Block Addressing ..............................................................3-9

3.3 Defect Management ..............................................................................3-11

3.3.1 Defect list ............................................................................................3-11

3.3.2 Alternate block allocation...................................................................3-11

CHAPTER 4 Installation Requirements ........................................................4-1

4.1 Mounting Requirements..........................................................................4-1

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Contents

4.1.1 External dimensions ..............................................................................4-1

4.1.2 Mounting ...............................................................................................4-3

4.1.3 Notes on mounting ................................................................................4-3

4.2 Power Supply Requirements ...................................................................4-7

4.3 Connection Requirements .......................................................................4-9

4.3.1 Connector ..............................................................................................4-9

4.3.2 Interface connector................................................................................4-9

CHAPTER 5 Installation................................................................................. 5-1

5.1 Notes on Handling Drives .......................................................................5-1

5.2 Setting......................................................................................................5-3

5.2.1 Loop ID setting......................................................................................5-3

5.2.2 Mode settings ........................................................................................5-3

5.3 Mounting Drives......................................................................................5-4

5.3.1 Mounting procedures.............................................................................5-4

5.4 Dismounting Drives.................................................................................5-5

5.5 Checking Operation after Installation and Preparing the IDD for Use...5-6

5.5.1 Checking initial operation.....................................................................5-6

5.5.2 Checking connection.............................................................................5-7

5.5.3 Formatting ...........................................................................................5-10

5.5.4 Setting parameters...............................................................................5-12

5.6 Spare Disk Drive ...................................................................................5-16

CHAPTER 6 Diagnostics and Maintenance.................................................. 6-1

6.1 Diagnostics ..............................................................................................6-1

6.1.1 Self-diagnostics .....................................................................................6-1

6.1.2 Test programs........................................................................................6-4

6.2 Maintenance Information ........................................................................6-5

6.2.1 Precautions ............................................................................................6-5

6.2.2 Maintenance requirements ....................................................................6-6

6.2.3 Maintenance levels................................................................................6-8

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Contents

6.2.4 Revision numbers..................................................................................6-9

6.2.5 Tools and test equipment ....................................................................6-10

6.2.6 Tests ....................................................................................................6-10

6.3 Operation Check....................................................................................6-12

6.3.1 Initial seek operation check ................................................................6-12

6.3.2 Operation test ......................................................................................6-12

6.3.3 Diagnostic test.....................................................................................6-12

6.4 Troubleshooting Procedures..................................................................6-13

6.4.1 Outline of troubleshooting procedures................................................6-13

6.4.2 Troubleshooting with disk drive replacement in the field..................6-13

6.4.3 Troubleshooting at the repair site .......................................................6-15

6.4.4 Troubleshooting with parts replacement in the factory ......................6-16

6.4.5 Finding possibly faulty parts...............................................................6-16

CHAPTER 7 Error Analysis............................................................................7-1

7.1 Error Analysis Information Collection ...................................................7-1

7.1.1 Sense data..............................................................................................7-1

7.1.2 Sense key, sense code, and subsense code............................................7-1

7.2 Sense Data Analysis................................................................................7-3

7.2.1 Error information indicated with sense data.........................................7-3

7.2.2 Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx).................7-4

7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error........7-4

7.2.4 Sense data (5-2x-xx), (5-3D-00), (B-47-xx), (B-49-00), (B-4D-xx) and

(B-4E-00): fibre channel interface error ...............................................7-4

APPENDIX A Connector Signal Allocation ................................................... A-1

A.1 Interface (FC-SCA) Connector Signal Allocation................................. A-2

Glossary ...........................................................................................................GL-1

Abbreviation.....................................................................................................AB-1

Index ................................................................................................................. IN-1

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xiii

Contents

Illustrations

Figures

Figure 1.1 FC model drives outer view........................................................1-5

Figure 1.2 Disk/head configuration..............................................................1-6

Figure 1.3 Example of FC-AL system configuration...................................1-7

Figure 3.1 Cylinder configuration ................................................................3-2

Figure 3.2 Spare area in cell.........................................................................3-5

Figure 3.3 Alternate cylinder........................................................................3-5

Figure 3.4 Track format................................................................................3-6

Figure 3.5 Track skew/head skew ................................................................3-7

Figure 3.6 Sector format...............................................................................3-7

Figure 3.7 Alternate block allocation by FORMAT UNIT command .......3-12

Figure 3.8 Alternate block allocation by REASSIGN

BLOCKS command ..................................................................3-13

Figure 4.1 External dimensions....................................................................4-2

Figure 4.2 IDD orientations..........................................................................4-3

Figure 4.3 Mounting frame structure............................................................4-4

Figure 4.4 Limitation of side-mounting .......................................................4-4

Figure 4.5 Surface temperature measurement points...................................4-5

Figure 4.6 Service clearance area.................................................................4-6

Figure 4.7 Current waveform (+12 VDC)....................................................4-7

Figure 4.8 AC noise filter (recommended)...................................................4-8

Figure 4.9 Connector location ......................................................................4-9

Figure 4.10 SCA2 type connector ................................................................4-10

Figure 5.1 Checking the IDD connection (A) ..............................................5-8

Figure 5.2 Checking the IDD connection (B)...............................................5-9

Figure 6.1 Revision label (example) ............................................................6-9

Figure 6.2 Indicating revision numbers......................................................6-10

Figure 6.3 Test flowchart............................................................................6-11

Figure 7.1 Format of extended sense data....................................................7-2

xiv

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Contents

Tables

Table 2.1 Model names and order numbers................................................ 2-1

Table 2.2 Function specifications ............................................................... 2-2

Table 2.3 Environmental/power requirements............................................ 2-4

Table 3.1 Zone layout and track capacity................................................... 3-3

Table 3.2 Format capacity........................................................................... 3-9

Table 4.1 Surface temperature check point ................................................ 4-5

Table 5.1 Motor start mode......................................................................... 5-3

Table 6.1 Self-diagnostic functions ............................................................ 6-1

Table 6.2 System-level field troubleshooting........................................... 6-14

Table 6.3 Disk drive troubleshooting........................................................ 6-15

Table 7.1 Definition of sense data .............................................................. 7-3

Table A.1 FC-SCA connector: CN1 .......................................................... A-2

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CHAPTER 1

General Description

1.1 Standard Features

1.2 Hardware Structure

1.3 System Configuration

This chapter describes the feature and configuration of the MAS series intelligent disk drives (IDD).

IDDs are high performance large capacity 3.5 type fixed disk drives with an embedded Fibre-Channel

controller.

The interface used to connect the MAS series disk drives to the host system complies with NCITS TR-19

Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), which is the Fibre Channel PLDA standard

covering items ranging from Fibre Channel physical layers to SCSI command protocols.

The high-speed data transfer and long-distance transmission capabilities of Fibre Channel technology and the

powerful command set of the MAS disk driver facilitate creation of high-performance and highly reliable disk

subsystems with large storage capacities.

The data format can be changed from the format at factory shipment by re-initializing with the use's system.

Refer to the Fibre Channel Interface Specification.

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1-1

General Description

1.1

Standard Features

(1)

Compactness

In a compact enclosure having the 3.5-inch HDD form factor, the IDD contains an FC-AL controller,

which supports the Arbitrated Loop technology (FC-AL), a Fibre Channel technology defined by the

related ANSI standard.

(2)

FC-AL standard

The IDD provides not only FC-AL basic functions but also the following features:

•

Arbitration

Disconnection/Reconnection

Data bus parity

The SCSI commands can manipulate data through logical block addressing regardless of the physical

characteristics of the disk drive. This allows software to accommodate future expansion of system

functions.

(3)

(4)

Dual-port support

The IDD has two pairs of driver and receiver sets for the Fibre Channel to support dual-port

connection.

High-speed data transfer

The maximum data-transfer speed on the Fibre Channel loop is 212.5 MB/s. The large-capacity data

buffer of the IDD enables the effective use of such high-speed data transfers available on the Fibre

Channel loop.

(5)

Continuous block processing

The addressing method of data blocks is logical block address. The initiator can access data by

specifying block number in a logically continuous data space without concerning the physical

structure of the track or cylinder boundaries.

The continuous processing up to [64K-1] blocks in a command can be achieved, and IDD can perform

continuous read/write operation when processing data blocks on several tracks or cylinder.

(6)

Programmable multi-segment data buffer

The data buffer is 32M bytes. Data is transferred between Fibre Channel Loop and disk media

through this data buffer. This feature provides the suitable usage environment for users.

Since the initiator can control the disconnect/reconnect timing on the Fibre Channel Loop by

specifying the condition of stored data to the data buffer or empty condition of the data buffer, the

initiator can perform the effective input/output operations with utilizing high data transfer capability

of the Fibre Channel Loop regardless of actual data transfer rate of the disk drive.

1-2

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1.1 Standard Features

(7)

Cache feature

After executing the READ command, the IDD reads automatically and stores (prefetches) the

subsequent data blocks into the data buffer (Read-ahead caching).

The high speed sequential data access can be achieved by transferring the data from the data buffer without

reaccessing the disk in case the subsequent command requests the prefetched data blocks.

The Write Cache feature is supported. When this feature is enabled, the status report is issued

without waiting for completion of write processing to disk media, thereby enabling high speed write

processing.

When Write Cache is enabled, you should ensure that the cached data is

surely flushed to the disc media before you turn off the drive's power.

To ensure it, you should issue either the SYNCHRONIZE CACHE

command or the STOP UNIT command with specifying “0” to the

Immediate bit, and then confirm that the command is surely terminated

with the GOOD STATUS.

(8)

Command queuing feature

The IDD can queue maximum 128 commands, and optimizes the issuing order of queued commands

by the reordering function. This feature realizes the high speed processing.

(9)

Reserve and release functions

The IDD can be accessed exclusively in the multi-host or multi-initiator environment by using the

reserve and release functions.

(10)

Enclosure service function

The IDD supports the enclosure service interface (ESI), which complies with SFF-8067. The ESI

interface enables use of the SCSI-3 enclosure service command set (SES) so that the functions that

specify and read enclosure service information can be used.

(11)

Error recovery

The IDD can try to recover from errors in Fibre Channel Loop or the disk drive using its powerful

retry processing. If a recoverable data check occurs, error-free data can be transferred to the initiator

after being corrected in the data buffer. The initiator software is released from the complicated error

recover processing by these error recovery functions of the IDD.

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1-3

General Description

(12)

Automatic alternate block reassignment

If a defective data block is detected during read or write the IDD can automatically reassign its

alternate data block.

(13)

Programmable data block length

Data can be accessed in fixed-block length units. The data block length is programmable, and can be

specified at initializing with a multiple of four within the range of 512 to 528 bytes.

Error rate increase

1. The drive format at factory shipment is generally 512 bytes.

2. The recoverable Error of the drive might increase when the format would

be modified from 512 bytes to the following values:

516 bytes, 520 bytes, 524 bytes, 528 bytes.

3. The recoverable Error referred here is sense data (1-13-xx).

(14)

Defective block slipping

A logical data block can be reallocated in a physical sequence by slipping the defective data block at

formatting. This results in high speed contiguous data block processing without a revolution delay

due to defective data block.

(15)

(16)

High speed positioning

A rotary voice coil motor achieves fast positioning.

Large capacity

A large capacity can be obtained from 3.5 type disk drives by dividing all cylinders into several

partitions and changing the recording density on each partition (constant density recording). The disk

subsystem with large capacity can be constructed in the good space efficiency.

(17)

(18)

Start/Stop of spindle motor

Using the SCSI command, the host system can start and stop the spindle motor.

Diagnosis

The IDD has a diagnostic capability which checks internal controller functions and drive operations

to facilitate testing and repair.

1-4

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1.2 Hardware Structure

(19)

Low power consumption

By using highly integrated LSI components, the power consumption of the IDD is very low, and this

enables the unit to be used in wide range of environmental conditions.

(20)

(21)

Low noise and low vibration

The noise level is low; approx. 3.6 Bels Ready for MAS series. This makes it ideal for office use.

Microcode downloading

The IDD implements the microcode download feature. This feature achieves easy maintainability of

the IDD and function enhancing.

1.2

Hardware Structure

An outer view of the IDD is given in Figures 1.1. The IDD is composed of the disk, head, spindle

motor, mounted disk enclosure (DE) with actuator and air circulation filter, as well as read/write pre-

amp with the printed circuit assembly (PCA) of the controller.

Figure 1.1 FC model drives outer view

(1)

Disks

The disks have an outer diameter of 70 mm (2.8 inch) and an inner diameter of 25 mm (0.98 inch) for

MAS series. The disks are good for at least 20,000 contact starts and stops. Each model contains

following number of disks.

MAS3735FC: 4

MAS3367FC: 2

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1-5

General Description

(2)

Heads

The MR (Magnet - Resistive) of the CSS (contact start/stop) type heads are in contact with the disks

when the disks are not rotating, and automatically float when the rotation is started. Figure 1.2 shows

the configuration of disks and heads

MAS3735FC

MAS3367FC

Base

Cover

Figure 1.2 Disk/head configuration

(3)

(4)

Spindle motor

The disks are rotated by a direct-drive hall-less DC motor. The motor speed is controlled by a

feedback circuit using the counter electromotive current to precisely maintain the specified speed.

Actuator

The actuator, which uses a rotary voice coil motor (VCM), consumes little power and generates little

heat. The heads at the end of the actuator arm is controlled and positioned via feedback of servo

information in the data.

The heads are positioned on the CCS zone over the disks when the power is off or the spindle motor

is stopped.

(5)

Air circulation (recirculation filter, breather filter)

The disk enclosure (DE) configures a clean room to keep out particles and other contaminants. The

DE has a closed-loop air recirculation system. Using the movement of the rotating disks, air is

continuously cycled through a filter. This filter will trap any particles floating inside the enclosure

and keep the air inside the DE contaminant free. To prevent negative pressure in the vicinity of the

spindle when the disks begin rotating, a breather filter is attached. The breather filter also equalizes

the internal air pressure with the atmospheric pressure due to surrounding temperature changes.

1-6

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1.3 System Configuration

(6)

Read/write circuit

The read/write circuit utilizes a read channel mounted with a head IC that supports high-speed

transmission and an MEEPR4ML (Modified Enhanced Extended Partial Response Class 4 Maximum

Likelihood) modulation/demodulation circuit in order to prevent errors being triggered by external

noise and to improve data reliability.

(7)

Controller circuit

The controller circuit uses LSIs to increase the reliability and uses a high speed microprocessing unit

(MPU) to increase the performance of the SCSI controller.

1.3

System Configuration

For the Fibre Channel, the ANSI standard defines Arbitrated Loop, Fabric, and Point-to-Point

technologies. The MAS series disk drives support the Arbitrated Loop technology. Figure 1.3 gives

an example of the FC-AL system configuration.

Port B

Port A

Port B

Port A

Initiator

(Node-1)

Drive

(Node-2)

Port B

Port A

Port B

Port A

Drive

(Node-4)

Drive

(Node-3)

Figure 1.3 Example of FC-AL system configuration

Any device connected to the Fibre Channel is called a node. The nodes shown in Figure 1.3

represent the initiator and individual disk drives. Each node has at least one port called an N_port.

For FC-AL, each port is called a Node-Loop port (NL_port).

The MAS series disk drive has two ports, one of which is used for connections to an FC-AL. A

maximum of 126 NL_ports can be connected to a single port.

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1-7

General Description

(1)

Loop configuration

A port embedded with sending and receiving circuits uses differential signals to send and receive data

on electric signal lines. A pair of signal lines is called a link. Since signals are sent in one direction

on a link, the links in a system must be connected to form a loop. The FC-AL interface sends and

receives data via nodes on the loop. Therefore, if a node connected to a loop is powered off or the

interface signals of a node cannot be sent or received correctly, the loop does not work normally. A

common solution preventing this problem from occurring is to add a port bypass circuit on the back

plane of the system. BC in Figure 1.3 indicates the port bypass circuit.

(2)

Node addressing

A specific device number called a SEL ID is assigned to each node on a Fibre Channel loop. The

combination of signal levels on the back plane is used to define the SEL ID of a disk drive. The

signal levels are sent on the seven signals (from SEL_0 to SEL_6) from CN1, which serves as an

SCA interface connector. SEL_6 is the most significant bit (MSB), having a bit weight of the sixth

power of 2, and SEL_0 is the least significant bit (LSB), having a bit weight of the zeroth power of 2.

Any number from 0 (X’00) to 125 (X’7D’) can be assigned as the SEL ID of a disk drive.

1-8

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CHAPTER 2

Specifications

2.1 Hardware Specifications

This chapter describes specifications of the IDD.

2.1

Hardware Specifications

2.1.1

Model name and order number

Each model has a different recording capacities when shipped.

Table 2.1 lists the model name and order number.

The data format can be changed by reinitializing with the user's system.

Table 2.1

Model names and order numbers

Capacity

Number of

heads

Model name

Order number

Interface type

Number of disks

(user area)

73.49 GB (*)

36.77 GB (*)

MAS3735FC CA06244-B400 SCA2, FC-AL

MAS3367FC CA06244-B200 SCA2, FC-AL

(*) 1GB = 1,000,000,000 bytes

C141-E198

2-1

Specifications

2.1.2

Function specifications

Table 2.2 shows the function specifications of the IDD.

Table 2.2

Function specifications

Specification

Item

MAS3735FC

MAS3367FC

Formatted capacity/device (*1)

Number of disks

73.49 GB (*6)

36.77 GB (*6)

Number of heads

Number of cylinders (*2)

Formatted capacity/track (B)

Number of rotations min^-1(rpm)

Average latency time

Track to Track

27,094

27,150

285,696 to 360,960

15,000 ± 0.2%

2.00 msec

0.3 ms/0.5 ms

3.3 ms/3.8 ms

8.0 ms/9.0 ms

30 s typ. (60 s max.)

30 s typ.

Seek time (*3)

(Read/Write)

Average

Full stroke

Start time

Stop time

Start/stop time

(*4)

Recording mode

32/34 MEEPRML

25.4 mm

Height:

Width:

Depth:

External

dimensions

101.6 mm

146.0 mm

Weight (max)

0.80kg

Power consumption (*5)

Interface

13.0 W

10.2 W

Cable length: 30 m max

93.11 to 118.22 MB/s

Data

Disk drive

FC-AL

transfer

rate

212.5 MB/s max.

Logical data block length

512 to 528 byte (Fixed length)

FC-PLDA (NCITS TR-19),

Command specification

FC-PH (ANSI X3.230-1994), FC-PH-2 (ANSI X3.297-1996),

FC-AL (ANSI X3.272-199X), SCSI-FCP (ANSI X3.269-199X)

32 MB FIFO ring buffer (*7)

Data buffer

Acostic noise (Ready)

3.6 Bels typ. (4.1 Bels max.)

(*1)

The formatted capacity can be changed by changing the logical block length and using spare sector

space. See Chapter 3 for the further information. The formatted capacity listed in the table is an

estimate for 512 bytes per sector.

(*2)

(*3)

The number of user cylinders indicates the max., and includes the alternate cylinder. The number of

user cylinders and alternate cylinders can be specified at format of the IDD.

The positioning time is as follows:

2-2

C141-E198

2.1 Hardware Specifications

Seek Difference [2048 Cyl/div]

(*4)

(*5)

The start time is the time from power on or start command to when the IDD is ready, and the stop

time is the time for disks to completely stop from power off or stop command.

This value indicates at ready mode.

(*6) 1GB = 1,000,000,000 bytes

(*7) 1MB = 1,048,576 bytes

C141-E198

2-3

Specifications

2.1.3

Environmental specifications

Table 2.3 lists environmental and power requirements.

Table 2.3

Environmental/power requirements

Specification

Item

MAS3735FC

MAS3367FC

Operating

5 to 55°C

–10 to 70°C

–40 to 70°C

Non-operating

Temperature

(*1)

Transport (within a week)

DE surface temperature at

operating

5 to 60°C

Gradient

15°C/h or less

5 to 95%RH

Operating

Non operating

Transport (within a week)

Relative

humidity

Maximum wet bulb

temperature

29°C (no condensation)

Operating (*3)

Non-operating (*4)

Transport (packaged)

Operating

0.6 mm (5 to 20Hz)/9.8 m/s²(1G) (20 to 300 Hz) or less

3.1 mm (5 to 20Hz)/49m/s²(5G) (20 to 300Hz) or less

637.4m/s²(65G) (2 ms)

Vibration (*2)

Non-operating

Transport (packaged)

Operating

2451.7m/s²(250G) (2 ms)

Shock (*2)

Altitute

2451.7m/s²(250G) (2 ms)

–300 m to 3,000 m

(above sea

level)

Non-operating

–300 m to 12,000 m

+12 VDC

±5%

Ready

(Average)

0.75 A

0.52 A

Peak within

100 µs at

spin-up

3.0 A

Random

W/R

(about 80

IOPS)

Power

1.0 A

0.8 A

requirements

Input power

(*5)

+5 VDC

±5%

Ready

(Average)

Random

W/R

(about 80

IOPS)

1.3 A

Ripple (*6)

+5 V/+12 V 250 mVp-p

2-4

C141-E198

2.1 Hardware Specifications

(*1)

(*2)

For detail condition, see Section 4.1.

Vibration applied to the drive is measured at near the mounting screw hole on the frame as much as

possible.

(*3)

(*4)

At random seek write/read and default on retry setting with log sweep vibration.

At power-off state after installation

Vibration displacement should be less than 2.5 mm.

(*5)

(*6)

Input voltages are specified at the drive connector side, during drive ready state.

High frequency noise (over 20MHz) is less than 100 mVp-p.

2.1.4

Error rate

Errors detected during initialization and replaced by alternate block assignments are not included in

the error rate. Data blocks to be accessed should be distributed over the disk medium equally.

(1)

Unrecoverable error rate

Errors which cannot be recovered within 63 retries and ECC correction should not exceed 1 per 10¹⁵

bits.

Data loss

For MAS series, Reed Solomon codes are applied for their ECC. The

sector-data is divided into 4 interleaving sectors, and ECC is

performed in each sector where the maximum number of errors (up to

5 byte) can be corrected. [Total maximum byte: 5 byte × 4 ( interleave)

= 20 byte]

If the error of read sector keeps allowable error byte number,

correction is performed. However, if error byte exceeds its allowable

number, correction may not be performed properly.

(2)

Positioning error rate

Positioning errors which can be recovered by one retry should be 10 or less per 10⁸seeks.

2.1.5

Reliability

(1)

Mean Time Between Failures (MTBF)

MTBF of the IDD during its life time is 1,2000,000 hours (operating: 24 hours/day, 7 days/week

average DE surface temperature: 50°C or less).

C141-E198

2-5

Specifications

Note:

The MTBF is defined as:

Operating time (hours) at all field sites

The number of equipment failures from all field sites

MTBF=

Failure of the equipment means failure that requires repair, adjustments, or replacement.

Mishandling by the operator, failures due to bad environmental conditions, power trouble, host

system trouble, cable failures, or other failures not caused by the equipment are not considered.

(2)

(3)

Mean Time To Repair (MTTR)

MTTR is the average time taken by a well-trained service mechanic to diagnose and repair a drive

malfunction. The drive is designed for a MTTR of 30 minutes or less.

Service life

The service life under suitable conditions and treatment is as follows.

The service life is depending on the environment temperature. Therefore, the user must design the

system cabinet so that the average DE surface temperature is as possible as low.

•

DE surface temperature: 40°C or less

DE surface temperature: 41°C to 45°C

DE surface temperature: 46°C to 50°C

DE surface temperature: 51°C to 55°C

DE surface temperature: 56°C to 60°C

DE surface temperature: 61°C and more

5 years

4.5 years

4 years

3.5 years

3 years

Strengthen cooling power so that DE surface

temperature is 60°C or less.

Even if the IDD is used intermittently, the longest service life is 5 years.

Note:

The "average DE surface temperature" means the average temperature at the DE surface

throughout the year when the IDD is operating.

2-6

C141-E198

2.1 Hardware Specifications

(4)

Data security at power failure

Integrity of the data on the disk is guaranteed against all forms of DC power failure except on blocks

where a write operation is being performed. The above does not applied to formatting disks or

assigning alternate blocks.

C141-E198

2-7

This page is intentionally left blank.

CHAPTER 3

Data Format

3.1 Data Space

3.2 Logical Data Block Addressing

3.3 Defect Management

This chapter explains data space definition, logical data block addressing, and defect management on the IDD.

3.1

Data Space

The IDD manages the entire data storage area divided into the following three data spaces.

•

User space: Storage area for user data

Internal test space: Reserved area for diagnostic purposes

System space: Area for exclusive use of IDD itself

The user space allows a user access by specifying data. These space can be accessed with the logical

data block addressing method described in Section 3.2. The internal test space is used by Read/write

test of self-diagnostics test, but user can’t use direct access. The system space is accessed inside the

IDD at power-on or during the execution of a specific command, but the user cannot directly access

the system space.

3.1.1

Cylinder configuration

The IDD allocates cylinders to the user space, Internal test space, and system space. Figure 3.1 is the

cylinder configuration.

Spare areas (alternate areas) for defective sectors are provided in the user space. Several sectors in

the last track of one cell and several cell (alternate cylinders) in the user space are allocated as

alternate areas according to the user's assignment (MODE SELECT command). See Subsection 3.1.2

for details.

C141-E198

3-1

Data Format

Cylinder –99

Internal test cylinder

Internal test space

System space

Cylinder –92

SA84

•

Cylinder –88

Cylinder –4

SA0

Zone

Cell Cylinder

User Space for Cell 0-0

•

Spare Sectors per Cell 0

•

User Space for Cell 1-0

Spare Sectors per Cell 1

User Space

(Primary Cylinder

0 - (n-1))

•

m-27

User Space for Cell P1-0

Spare Sectors per Cell P1

•

Alternate Cylinder

(1)

User Space for Cell xx-1

User Space for Cell yy-17

n =27,093 (MAS3735FC)

27,149 (MAS3367FC)

Note: Spare sectors on the last track in each cylinder are not necessarily placed at the end of the track

because of a track skew or a cylinder skew. (Details are explained in Subsection 3.1.3.)

Figure 3.1 Cylinder configuration

Apart from the above logical configuration, the IDD intends to increase the storage capacity by

dividing all cylinders into several zones and changing a recording density of each zone. Tables 3.1 to

3.3 show the zone layout and the track capacity.

3-2

C141-E198

3.1 Data Space

Table 3.1

Zone layout and track capacity

Cylinder

Zone

Byte/track

Sector/track

MAS3735FC

MAS3367FC

0 - 1,848

360,960

359,424

350,208

340,992

336,384

331,776

322,560

317,952

313,344

304,128

294,912

290,304

285,696

705

702

684

666

657

648

630

621

612

594

576

567

558

1,849 - 3,697

3,698 – 5,546

5,547 – 7,395

7,396 – 9,244

9,245 – 11,093

11,094 – 12,298

12,299 – 14,315

14,316 – 16,080

16,081 – 17,173

17,174 – 19,330

19,331 – 20,255

20,256 – 21,404

21,405 – 22,469

22,470 – 24,514

24,515 – 26,195

26,196 – 26,840

26,841 – 27,093

26,841 – 27,149

Note: When the logical data block length is 512 bytes, the sector/track capacity indicates above amount

(1)

User space

The user space is a storage area for user data. The data format on the user space (the length of data

block and the number of data blocks) can be specified with the MODE SELECT or MODE SELECT

EXTENDED command.

The default value of cylinders in the user space is MAS3735FC = 27,094, MAS3367 FC = 27,150.

These also equal the maximum cylinders number for each series. The user can also specify the

number of logical data blocks to be placed in the user space with the MODE SELECT or MODE

SELECT EXTENDED command. When the number of logical data blocks is specified, as many

cylinders as required to place the specified data blocks are allocated in the user space.

C141-E198

3-3

Data Format

A number starting with 0 is assigned to each cylinder required in the user space in ascending order.

If the number of cylinders do not reach the maximum, the rest of the cylinders will not be used.

Always one cylinder that is located at the end of each zone in the user space can be established as an

alternate cylinder. Alternate cylinders will be used for alternate blocks when primary cylinders in the

user space are used up. See Subsections 3.1.2 and 3.3.2 for details.

(2)

(3)

Internal test space

The Internal test space is an area for diagnostic purposes only and its data block length is always

512KByte. The Internal test space consists of 8 cylinders and outer-host cylinder is always assigned.

The user cannot change the number of cylinders in the Internal test space or their positions.

System space

The system space is an area for exclusive use of the IDD itself and the following information are

recorded.

•

Defect list (P list and G list)

MODE SELECT parameter (saved value)

Statistical information (log data)

Controller control information

The above information is duplicated in several different locations for safety.

Note:

The system space is also called SA space.

3.1.2

Alternate spare area

The alternate spare area consists of the last track of each cell in the user space and an alternate

cylinder allocated to the last cylinder of each zone.

The spare area in each cell is placed at the end of the last track as shown in Figure 3.2. These spare

sectors are located in the end of the track logically, not necessarily located at the end physically

because of track skew or cylinder skew. (Details are explained on Subsection 3.1.3.)

Size can be specified by the MODE SELECT command.

The number of spare sectors per cell can be specified from 0 to 168. The default for the spare sectors

number is 168.

3-4

C141-E198

3.1 Data Space

Cell

Note: This drive manages alternate spare areas for each cell, which is a set of cylinders. One cell

consists of 28 cylinders.

Figure 3.2 Spare area in cell

An alternate cylinder is used when spare sectors in a cell are used up or 0 is specified as the number

of spare sectors in a cell. 1 cylinder at the end of each zone of the user space is allocated as alternate

cylinders as shown in Figure 3.3.

The user space and the CE space share the alternate cylinders.

Zone

Figure 3.3 Alternate cylinder

Note:

The number of alternate cylinders can not be changed.

3.1.3

(1)

Track format

Physical sector allocation

Figure 3.4 shows the allocation of the physical sectors in a track. The length in bytes of each

physical sector and the number of sectors per track vary depending on the logical data block length.

The unused area (G4) exists at the end of the track in formats with most logical data block lengths.

The interval of the sector pulse (length of the physical sector) is decided by multiple of 40MHz free

running frequency. This clock is not equal to the interval of the byte clock for each zone. Therefore,

the physical sector length cannot be described with a byte length.

C141-E198

3-5

Data Format

4.0 msec

Servo frame

n = 211 (zone 0) ~ 266 (zone 17)

Figure 3.4 Track format

(2)

Track skew and head skew

To avoid waiting for one turn involved in head and cylinder switching, the first logical data block in

each track is shifted by the number of sectors (track skew and head skew) corresponding to the

switching time. Figure 3.5 shows how the data block is allocated in each track.

At the head switching location in a cylinder, the first logical data block in track t + 1 is allocated at

the sector position which locates the track skew behind the sector position of the last logical data

block sector in track t.

At the cylinder switching location, like the head switching location, the first logical data block in a

cylinder is allocated at the sector position which locates the head skew behind the last logical sector

position in the preceding cylinder. The last logical sector in the cylinder is allocated when

formatting, and is an unused spare sector.

3-6

C141-E198

3.1 Data Space

Cylinder skew

Head

Cylinder skew

Track skew

Head

P+1

Leading logical

sector in head p+1

Figure 3.5 Track skew/head skew

The number of physical sectors (track skew factor and head skew factor) corresponding to the skew

time varies depending on the logical data block length because the track skew and the head skew are

managed for individual sectors. The IDD automatically determines appropriate values for the track

skew factor and the head skew factor according to the specified logical data block length. The value

can be read out by the MODE SENSE or MODE SENSE EXTENDED command after the track has

been formatted.

3.1.4

Sector format

Each sector on the track consists of an ID field, a data field, and a gap field which separates them.

Figure 3.6 gives sector format examples.

SCT

PLO

SM1 DATA1 SM2 DATA2 BCRC ECC

PAD

G1 Sync

Servo

SCT

G1 Sync

PLO

G1 Sync

SM1 DATA1 SM2 DATA4 BCRC ECC

SM1 DATA1 SM2 DATA3

PAD

Figure 3.6 Sector format

C141-E198

3-7

Data Format

Each sector on the track consists of the following fields:

(1)

(2)

Gaps (G1, G2, G3)

No pattern is written on the gap field.

PLO Sync

In this field, pattern X'00' is written.

(3)

(4)

Sync Mark (SM1, SM2)

In this field, special pattern is written. This special pattern indicates the beginning of the data field.

Data field (DATA1-DATA4)

User data is stored in the data field of the sector. The length of the data field is equal to that of the

logical data block which is specified with a parameter in the MODE SELECT command. Any

multiple of 4 between 512 and 528 bytes can be specified as the length.

(5)

(6)

(7)

BCRC

It is a 4-byte error detection code. Errors in the ID field. Single burst errors with lengths of up to 32

bits for each logical block can be detected.

ECC

This is the 40-byte code that allows detection and correction of errors in the data field, which is

capable of correcting the single burst error up to 160 bits max. on the fly.

PAD

A specified length of x‘00’ pattern is written in this field. This field includes the variation by rotation

and circuit delay till reading/writing.

3-8

C141-E198

3.2 Logical Data Block Addressing

3.1.5

Format capacity

The size of the usable area for storing user data on the IDD (format capacity) varies according to the

logical data block or the size of the spare sector area. Table 3.2 lists examples of the format capacity

when the typical logical data block length and the default spare area are used. The following is the

general formula to calculate the format capacity.

[Number of sectors of each zone] = [number of sectors per track × number of tracks per cell –

number of alternate spare sectors per cell] × [number of cells in the zone]

[Formatted capacity] = [total of sectors of all zones] ÷ [number of physical sectors in logical block] ×

[logical data block length]

The following formula must be used when the number of logical data blocks are specified with the

parameter in the MODE SELECT or MODE SELECT EXTENDED command.

[Format capacity] = [logical data block length] × [number of logical data blocks]

The logical data block length, the maximum logical block address, and the number of the logical data

blocks can be read out by a READ CAPACITY, MODE SENSE, or MODE SENSE EXTENDED

command after initializing the disk medium.

Table 3.2

Format capacity

Model

Data heads Data block length

User blocks Format capacity (GB)

MAS3735FC

MAS3367FC

143,552,136

71,819,496

73.49 (*)

36.77 (*)

512

(*) 1GB = 1,000,000,000 bytes

Note:

Total number of spare sectors is calculated by adding the number of spare sectors in each primary

cylinder and the number of sectors in the alternate cylinders.

3.2

Logical Data Block Addressing

Independently of the physical structure of the disk drive, the IDD adopts the logical data block

addressing as a data access method on the disk medium. The IDD relates a logical data block address

to each physical sector at formatting. Data on the disk medium is accessed in logical data block

units. The INIT specifies the data to be accessed using the logical data block address of that data.

The logical data block addressing is a function whereby individual data blocks are given addresses of

serial binaries in each drive.

C141-E198

3-9

Data Format

(1)

Block address of user space

The logical data block address number is consecutively assigned to all of the data blocks in the user

space starting with 0 to the first data block.

The IDD treats sector 0, track 0, cylinder 0 as the first logical data block. The data block is allocated

in ascending order of addresses in the following sequence (refer to Figure 3.5):

1) Logical data blocks are assigned in ascending order of sector number in the same track.

2) Subsequent logical data blocks are assigned to sectors in every track except the last track in

ascending order of track number in the same track (head). Within the same track, logical data

blocks are assigned in the same way as step 1).

3) Subsequent logical data blocks are assigned to sectors in every track except the last track in

ascending order of track number in the same cell. Within the same track, logical data blocks are

assigned in the same way as step 1).

4) For the last track in the same cell, subsequent logical data blocks are assigned to sectors other

than spare sectors in ascending order of sector number.

5) After blocks have been assigned in the same cell according to steps 1) to 4), subsequent logical

data blocks are assigned in ascending order of cell number in the same way as in steps 1) to 4).

Logical data blocks are assigned starting from track 0 in the next cell until the last cylinder

(immediately preceding the alternate cylinder n-1 shown in Figure 3.1) of the zone except

alternate cylinders in cells in the user space.

When the logical data block is allocated, some sectors (track skew and head skew) shown in Figure

3.5 are provided to avoid waiting for one turn involving head and cylinder switching at the location

where the track or the head is physically switched.

See Subsection 3.3.2 for defective/alternate block treatment and the logical data block allocation

method in case of defective sectors exist on the disk.

(2)

Alternate area

Alternate areas in the user space (spare sectors in the cell and alternate cylinders) are not included in

the above logical data block addresses. Access to sectors which are allocated as an alternate block in

the alternate area is made automatically by means of IDD sector slip treatment or alternate block

treatment (explained in Subsection 3.3.2), so the user does not have to worry about accessing the

alternate area. The user cannot access with specifying the data block on the alternate area explicitly.

3-10

C141-E198

3.3 Defect Management

3.3

Defect Management

Defect list

3.3.1

Information of the defect location on the disk is managed by the defect list. The following are defect

lists which the IDD manages.

•

P list (Primary defect list): This list consists of defect location information available at the disk

drive shipment and is recorded in a system space. The defects in this list are permanent, so the

INIT must execute the alternate block allocation using this list when initializing the disk.

•

D list (Data defect list): This list consists of defect location information specified in a FORMAT

UNIT command by the INIT at the initialization of the disk. This information is recorded in the

system space of the disk drive as the G list. To execute the alternate block allocation, the

FORMAT UNIT command must be specified.

•

G list (Growth defect list): This list consists of defective logical data block location information

specified in a REASSIGN BLOCKS command by the INIT, information on defective logical data

blocks assigned alternate blocks by means of IDD automatic alternate block allocation,

information specified as the D list, and information generated as the C list. They are recorded in

the system space on the disk drive.

The INIT can read out the contents of the P and G lists by the READ DEFECT DATA command.

3.3.2

Alternate block allocation

The alternate data block is allocated to a defective data block (= sectors) in defective sector units by

means of the defect management method inside the IDD.

The INIT can access all logical data blocks in the user space, as long as there is no error.

Spare sectors to which alternate blocks are allocated can be provided in either "spare sectors in a

cell" or "alternate cylinders". See Subsection 3.1.2 for details.

The INIT can specify the size and area for spare sectors by the MODE SELECT command at the

time of the initialization of the disk.

Both of the following are applicable to the alternate block allocation.

•

Sector slip treatment: Defective sectors are skipped and the logical data block corresponding to

those sectors is allocated to the next physical sectors. This treatment is made on the same cell as

the defective sector's and is effective until all spare sectors in that cell are used up.

•

Alternate sector treatment: The logical data block corresponding to defective sectors is allocated

to unused spare sectors in the same cell or unused spare sectors in the alternate cylinder.

The alternate block allocation is executed by the FORMAT UNIT command, the REASSIGN

BLOCKS command, or the automatic alternate block allocation. Refer to OEM Manual–Fibre

Channel Specifications–for details of specifications on these commands. The logical data block is

allocated to the next physically continued sectors after the above sector slip treatment is made. On

the other hand, the logical data block is allocated to spare sectors which are not physically

consecutive to the adjacent logical data blocks. If a command which processes several logical data

blocks is specified, the IDD processes those blocks in ascending order of logical data block.

C141-E198

3-11

Data Format

(1)

Alternate block allocation during FORMAT UNIT command execution

When the FORMAT UNIT command is specified, the allocation of the alternate block to those

defective sectors included in the specified lists (P, G, or D) is continued until all spare sectors in the

same cell are used up. When they are used up, unused spare sectors in the alternate cylinder are

allocated to the subsequent sectors in the cylinder by means of alternate sector treatment. Figure 3.7

is examples of the alternate block allocation during the FORMAT UNIT command execution.

: n represents a logical data block number

: Defective sector

: Unused spare sector

Figure 3.7 Alternate block allocation by FORMAT UNIT command

During FORMAT UNIT command, alternate block allocation is conducted in following cases:

1) Unrecovered write offtrack condition during a media write

2) Uncorrectable Data Error during a media read (certification) *1

If above errors are detected during FORMAT UNIT command, the IDD allocates the alternate

block(s) to the defective data blocks. Reassign procedure itself is the same as one in REASSIGN

BLOCKS command.

3-12

C141-E198

3.3 Defect Management

*1 Certification is permitted when DCRT flag is cleared (DCRT flag=0) in FORMAT UNIT

command.

The IDD checks all initialized logical data blocks by reading them out after the above alternate

block allocation is made to initialize (format) the disk.

(2)

Alternate block allocation by REASSIGN BLOCKS command

When the REASSIGN BLOCKS command is specified, the alternate block is allocated to the

defective logical data block specified by the initiator by means of alternate sector treatment. If there

are unused spare sectors in the same cell as the specified defective logical data block, the alternate

block is allocated to these unused spare sectors. However, the alternate block is allocated to unused

spare sectors in the alternate cylinder when all spare sectors in the cell are used up.

Figure 3.8 is examples of the alternate block allocation by the REASSIGN BLOCKS command.

Alternate sectors

The same cell

: n represents a logical data block number

: Defective sector

: Unused spare sector

Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command

C141-E198

3-13

Data Format

(3)

Automatic alternate block allocation

Automatic alternate block allocation at read operation

•

If the ARRE flag in the MODE SELECT parameter permits the automatic alternate block allocation,

the IDD automatically executes the alternate block allocation and data duplication on the defective

data block detected during the READ or READ EXTENDED command. This allocation method is

the same as with the REASSIGN BLOCKS command (alternate sector treatment).

•

Automatic alternate block allocation at write operation

If AWRE flag in the MODE SELECT parameter permits the automatic alternate block allocation, the

IDD executes two kinds of automatic alternate processing during WRITE command processing as

described below:

Type 1 (Reassignment of Uncorrectable Read Error)

1) Commands to be applied

WRITE

WRITE EXTEND

WRITE at executing WRITE AND VERIFY

2) Application requirements

When any of the above commands is issued to LBA registered in the uncorrectable error log of

the READ command (LBA log of uncorrectable error while the READ command is executed),

the AWRE processing is applied.

3) AWRE processing

The following processings are performed when the LBA matches the one in the uncorrectable

error log:

a) Primary media check

Creates an uncorrectable error pattern (invalid LBA pattern) in the position of the error

LBA, repeats the primary media check up to three times. If the error still occurs after the

check repeated three times, it is judged to be defective. Then, it performs the alternate

processing.

b) Alternate processing

Alternate media check

Writes the data that causes an unrecoverable error into the alternate block, and performs

the media check.

(If the alternate block is a defective sector, the block is registered to the G list, another

alternate block is allocated.)

c) SA and defect map update processing (on alternate side)

When an error occurs in the alternate processing, this WRITE command terminates with error.

When the alternate processing normally terminates, the WRITE command is executed.

Depending on the alternate processing result, one of the following sense codes is returned:

Alternate processing is succeeded: 01-OC-01

Fatal error (SA write retry out):

03-OC-02

3-14

C141-E198

3.3 Defect Management

Type 2 (Reassignment of write fail sector)

1) Commands to be applied

WRITE command

WRITE EXTENDED command

2) Application requirements / processing

When WRITE/WRITE EXTENDED command detects any Servo error (e.g. Write offtrack error)

and cannot be recovered within pre-determined retry number (specified in Mode Parameter). For

the sectors around defective Servo, alternate blocks are allocated and the data of this WRITE

commands are re-written.

Sectors to be made AWRE shall be following:

the sector where the error occurs and the latter sectors and,

the sectors whose data are logically continual and stored in Cache,

the sectors which will be processed in this Write command and,

the sectors which locate between erroneous Servo -1 and +1 (including Split sector)

This function is also applied for the sector that has already been re-assigned.

Remark:

When a write protection is prohibited through the setting terminal, the auto alternate block

allocation processing specification is disabled.

Automatic alternate block allocation is made only once during the

execution of one command. If second defective block is detected, the

alternate block assignment processing for the first defective block is

executed but the alternate block assignment processing for the second

one is not executed and the command being executed terminates.

However, the initiator can recover the twice error by issuing the same

command again.

When an error is detected in a data block in the data area, recovery

data is rewritten and verified in automatic alternate block allocation

during the execution of the READ or READ EXTENDED command.

Alternate block allocation will not be made for the data block if

recovery is successful.

Example: Even if the data error which is recoverable by the WRITE

LONG command is simulated, automatic alternate block

allocation will not be made for the data block.

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3-15

This page is intentionally left blank.

CHAPTER 4

Installation Requirements

4.1 Mounting Requirements

4.2 Power Supply Requirements

4.3 Connection Requirements

This chapter describes the environmental, mounting, power supply, and connection requirements.

4.1

Mounting Requirements

External dimensions

4.1.1

Figures 4.1 show the external dimensions of the IDD and the location of the holes for the IDD

mounting screws.

Note:

Dimensions are in mm.

Mounting screw: #6-32UNC

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4-1

Installation Requirements

The value marked with (*) indicates the dimension between mounting holes on the bottom face.

Figure 4.1 External dimensions

4-2

C141-E198

4.1 Mounting Requirements

4.1.2

Mounting

The permissible orientations of the IDD are shown in Figure 4.2, and the tolerance of the angle is ±5°

from the horizontal plane.

(a) Horizontal –1

(b) Horizontal –2

(d) Vertical –2

(e) Upright mounting –1

Direction of gravity

(f) Upright mounting –2

Figure 4.2 IDD orientations

4.1.3

Notes on mounting

(1)

Mounting frame structure

Special attention must be given to mount the IDD disk enclosure (DE) as follows.

a) Use the frame with an embossed structure, or the like. Mount the IDD with making a gap of

2.5 mm or more between the IDD and the frame of the system.

b) As shown in Figure 4.3, the inward projection of the screw from the IDD frame wall at the

corner must be 5.0 mm or less.

C141-E198

4-3

Installation Requirements

c) Tightening torque of screw must be secured with 0.59N· m (6kgf· cm) ±12%.

d) Impact caused by the electric driver must be within the device specifications.

e) Must be handled on an anti-static mat.

5.0 or less

Figure 4.3 Mounting frame structure

(2)

Limitation of side-mounting

Mount the IDD using the 4 screw holes at the both ends on the both sides as shown in Figure 4.4. Do

not use the center hole by itself.

In case of using the center hole, it must be used in combination with 2 holes on both ends.

(Total 6 screws for 6 holes enclosed)

Holes for

mounting screw.

Do not use center holes.

Holes for mounting screw

Use four holes (No.1-4) to mount.

Figure 4.4 Limitation of side-mounting

4-4

C141-E198

4.1 Mounting Requirements

(3)

(4)

Limitation of bottom-mounting

Use all 4 mounting holes on the bottom face.

Environmental temperature

Temperature condition at installed in a cabinet is indicated with ambient temperature measured 3 cm

from the disk drive. At designing the system cabinet, consider following points.

•

Make a suitable air flow so that the DE surface temperature does not exceed 60°C.

Cool the PCA side especially with air circulation inside the cabinet. Confirm the cooling effect

by measuring temperature of specific ICs and the DE. These measurement results should be

within a criteria listed in Table 4.1.

•

Keeping the DE surface temperature at 50°C or below at ambient temperature 25°C, which is a

condition for assuring an MTBF of 1,200,000 hours, requires an air flow of 0.7 m/s.

Table 4.1

Surface temperature check point

No.

Measurement point

Criteria

60°C

88°C

92°C

90°C

91°C

Center of DE cover

Read channel LSI

VCM/SPM Driver

HDC

MPU

Figure 4.5 Surface temperature measurement points

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4-5

Installation Requirements

(5)

Service clearance area

The service clearance area, or the sides which must allow access to the IDD for installation or

maintenance, is shown in Figure 4.6.

[Surface R]

- Hole for mounting screw

[Surface P]

- Cable connection

[Surface Q]

- Hole for mounting screw

Figure 4.6 Service clearance area

(6)

(7)

External magnetic field

The drive should not be installed near the ferromagnetic body like a speaker to avoid the influence of

the external magnetic field.

Leak magnetic flux

The IDD uses a high performance magnet to achieve a high speed seek. Therefore, a leak magnetic

flux at surface of the IDD is large. Mount the IDD so that the leak magnetic flux does not affect to

near equipment.

(8)

Others

Seals on the DE prevent the DE inside from the dust. Do not damage or peel off labels.

4-6

C141-E198

4.2 Power Supply Requirements

4.2

Power Supply Requirements

(1)

Allowable input voltage and current

The power supply input voltage measured at the power supply connector pin of the IDD (receiving

end) must satisfy the requirement given in Subsection 2.1.3. (For other requirements, see Items (4)

below.)

(2)

Current waveform (reference)

Figure 4.7 shows the waveform of +12 VDC.

MAS3735FC

MAS3367FC

Time (2 sec/div)

Figure 4.7 Current waveform (+12 VDC)

(3)

(4)

Power on/off sequence

The order of the power on/off sequence of +5 VDC and +12 VDC, supplied to the IDD, does not

matter.

Sequential starting of spindle motors

After power is turned on to the IDD, a large amount of current flows in the +12 VDC line when the

spindle motor rotation starts. Therefore, if more than one IDD is used, the spindle motors should be

started sequentially using one of the following procedures to prevent overload of the power supply

unit.

a) Issue START/STOP commands at more than 12-second intervals to start the spindle motors. For

details of this command specification, refer to Fibre Channel Interface Specifications.

b) Turn on the +12 VDC power in the power supply unit at more than 12-second intervals to start

the spindle motors sequentially.

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4-7

Installation Requirements

(5)

Noise filter

To eliminate AC line noise, a noise filter should be installed at the AC input terminal on the IDD

power supply unit. The specification of this noise filter is as follows:

•

Attenuation: 40 dB or more at 10 MHz

Circuit construction: T-configuration as shown in Figure 4.8 is recommended.

Figure 4.8 AC noise filter (recommended)

4-8

C141-E198

4.3 Connection Requirements

4.3

Connection Requirements

4.3.1

Connector

Figure 4.9 shows the locations of interface connector.

Interface connector (CN1)

(including power supply connector)

Figure 4.9 Connector location

4.3.2

Interface connector

The connector for the Fibre Channel Loop is an unshielded SCA-2 connector which has two 20-

pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.10 shows the connector. See Appendix A

for signal assignments on the connector.

For details on the physical/electrical requirements of the interface signals, refer to Chapter 1 in

Fibre Channel Interface Specifications.

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4-9

Installation Requirements

Figure 4.10 SCA2 type connector

4-10

C141-E198

CHAPTER 5

Installation

5.1 Notes on Handling Drives

5.2 Setting

5.3 Mounting Drives

5.4 Dismounting Drives

5.5 Checking Operation after Installation and Preparing

the IDD for Use

5.6 Spare Disk Drive

This chapter describes the notes on handling drives, setting, mounting drives, confirming drive operations

after installation and preparation for use, and dismounting drives.

5.1

Notes on Handling Drives

The items listed in the specifications in Table 2.1 must be strictly observed.

(1)

General notes

a) Do not give the drive shocks or vibrations exceeding the value defined in the standard because it

may cause critical damage to the drive. Especially be careful when unpacking.

b) Do not leave the drive in a dirty or contaminated environment.

c) Since static discharge may destroy the CMOS semiconductors in the drive, note the following

after unpacking:

•

Use an antistatic mat and body grounding when handling the drive.

Hold the DE when handling the drive. Do not touch PCAs except for setting.

Hot temperature

To prevent injury, do not handle the drive until after the device has

cooled sufficiently after turning off the power. The DE and LSI become

hot during operation and remain hot immediately after turning off the

power.

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5-1

Installation

(2)

Unpackaging

a) Use a flat work area. Check that the "This Side Up" sign side is up. Handle the package on soft

material such as a rubber mat, not on hard material such as a desk.

b) Be careful not to give excess pressure to the internal unit when removing cushions.

c) Be careful not to give excess pressure to the PCAs and interface connector when removing the

drive from the antistatic bag.

d) Do not remove the sealing label or cover of the DE and screws.

(3)

Installation/removal/replacement

a) Do not attempt to connect or disconnect connections when power is on.

b) Do not move the drive when power is turned on or until the drive completely stops (for 30

seconds) after power is turned off.

c) Place and keep removed screws and other parts where they will not get lost or damaged.

d) Keep a record of all maintenance work for replacing.

(4)

Packaging

a) Store the drive in an antistatic vinyl pack.

b) It is recommended to use the same cushions and packages as those at delivery. If those at

delivery cannot be used, use a package with shock absorption so that the drive is free from direct

shocks. In this case, fully protect the PCAs and interface connector so that they are not damaged.

c) Indicate "This Side Up" and "Handle With Care" on the outside of the package so that it is not

turned over.

(5)

Delivery

a) When delivering the drive, provide packaging and do not turn it over.

b) Minimize the delivery distance after unpacking and avoid shocks and vibrations with cushions.

For the carrying direction at delivery, use one of the mount allowable directions in Subsection

4.1.2 (vertical direction is recommended).

(6)

Storage

a) Provide vaporproof packaging for storage.

b) The storage environment must satisfy the requirements specified in Subsection 2.1.3 when the

drive is not operating.

c) To prevent condensation, avoid sudden changes in temperature.

5-2

C141-E198

5.2 Setting

5.2

Setting

5.2.1

Loop ID setting

When setting the fibre channel loop ID, use SEL0 to SEL6 of interface connector CN1. IN bit

weighting, SEL6 corresponds to the MSB, SEL0 to the LSB, and 126 types of X'00' to X'7D' can be

specified as loop IDs.

5.2.2

Mode settings

(1)

Motor start mode

The method for start control of the IDD spindle motor can be set in accordance with Table 5.1.

Table 5.1

Motor start mode

Setting

Signal name

Start_2/Mated

Start_1/Mated

Start mode

Connector pin

CN1-10

Open

CN1-09

Open

The drive is not connected to the system. The drive does not start the

spindle motor.

Open

GND

Open

GND

The drive is connected to the system. After recognizing the

connection, the drive starts the spindle motor upon receipt of a

START/STOP UNIT command.

The drive is connected to the system. After recognizing the

connection, the drive starts the spindle motor after a prescribed delay

time has elapsed.

The drive is connected to the system. The driver starts the spindle

motor immediately after recognizing the connection.

Set the loop ID so that there are no duplicates between devices on the

same loop.

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5-3

Installation

5.3

Mounting Drives

5.3.1

Mounting procedures

Since mounting the drive depends on the system cabinet structure, determine the work procedures

considering the requirements specific to each system. The general mounting method and items to be

checked are shown below.

See Subsection 4.1 for the details of requirements for installing the IDD.

1) With a system to which an external operator panel is mounted, if it is difficult to access the

connector after the drive is mounted on the system cabinet, connect the external operator panel

cable before mounting the drive.

2) Fix the drive in the system cabinet with four mounting screws as follows:

•

The drive has 10 mounting holes (both sides: 3 × 2, bottom: 4). Fix the drive by using four

mounting holes of both sides or the bottom. (See Figure 4.6)

Use mounting screws whose lengths inside the drive mounting frame are 5.0 mm or less

when the screws are tightened (see Figure 4.3).

When mounting the drive, be careful not to damage parts on the PCAs.

3) Check to ensure that the DE is not touching the frame on the system side after tightening the

screws. At least 2.5mm of clearance is required between the DE and the frame. (Indicated in

Figure 4.3)

4) When an electric driver is in use, less than device specifications must be used.

5-4

C141-E198

5.4 Dismounting Drives

5.4

Dismounting Drives

Since the method and procedure for dismounting the disk drive for replacement of the drive, etc.

depends on the locker structure of the system, etc., the work procedure must be determined in

consideration of the requirements specific to the system. This section describes the general

procedure and notes on dismounting the drive.

Damage

1. When dismounting the drive which is mounted on the system while power is

supplied to it.

•

The drive to be dismounted must be separated from the loop.

Dismounting the drive which is not separated from the loop may cause

an unexpected error.

•

If the drive is not separated from the loop, issue an LPB to the drive

from the initiator in a primitive sequence of the order set.

It is recommended to stop the spindle motor prior to this loop

separation operation. The spindle motor can be stopped by a

START/STOP command. It takes about 30 seconds for the spindle

motor to stop completely.

•

Then, dismount the drive using the drive mounting/dismounting

mechanism, etc. of the system. If the drive is dismounted while the

spindle motor is running, special care is required to avoid excessive

vibration or shock to the drive. It is recommended to stop the operation

once the SCA connector breaks off contact and wait until the spindle

motor stops (about 30 seconds) before dismount the drive.

When storing or transporting the drive, put it in an antistatic bag.

(Shown in Section 5.1).

2. When dismounting the drive which is mounted on the system while power is

not supplied to it.

•

Do not move the drive until the drive stops completely (about 30

seconds if the spindle motor was stopped by a START/STOP UNIT

command, and about 30 seconds after powering-off when the power

was simply turned off).

•

Then, dismount the drive using the drive mounting/dismounting

mechanism, etc. of the system.

When storing or transporting the drive, put it in an antistatic bag.

(Shown in Section 5.1).

C141-E198

5-5

Installation

5.5

Checking Operation after Installation and Preparing the IDD for Use

5.5.1

Checking initial operation

This section explains how to check operation after power is turned on. Since the initial operation of

an IDD differs depending on the settings of the motor start mode, check the following initial

operations according to the motor start mode set during installation.

(1)

Initial operation if the settings have been specified so that turning power on automatically starts

rotating the motor

a) When power is turned on, the Active LED blinks and the IDD starts the initial self-diagnosis.

b) If the initial self-diagnosis detects a problem, the IDD sends the Fault LED Out signal to the

interface connector, as specified by SFF8045.

Remark: The spindle motor may or may not start rotating in this stage.

c) If the IDD is in idle mode, the Active LED remains lit. (When the initiator accesses the IDD, the

LED goes off and then goes on again at the end of the processing requested by the initiator.)

(2)

Initial operation if the settings have been specified so that the START/STOP UNIT command is used

to start rotating the motor

a) When power is turned on, the Active LED goes on momentarily and the IDD starts the initial

self-diagnosis.

b) If the initial self-diagnosis detects a problem, the IDD sends the Fault LED Out signal to the

interface connector, as specified by SFF8045.

c) The spindle motor does not rotate until the START/STOP UNIT command is received. The

initiator is required to use the procedure described in Section 5.5.2 to send the START/STOP

UNIT command.

d) About 60 seconds after the START/STOP UNIT command is received, the disk drive enters the

READY state. The IDD then starts reading system information from the system space on disks.

e) The Active LED goes off while the command is being executed.

Take the following actions if a problem occurs:

(3)

a) Check if all cables are correctly connected.

b) Check if the power supply voltage is correct. (Measure the voltage at the power connector on the

IDD.)

5-6

C141-E198

5.5 Checking Operation after Installation and Preparing the IDD for Use

c) Continuous sending of the Fault LED Out signal to the interface connector indicates the initial

self-diagnosis has detected a problem. In this event and if the situation allows, sense data should

be obtained by issuing the REQEUST SENSE command from the initiator (host system). Sense

data is information required for troubleshooting.

The Active LED goes off while the IDD command is being executed.

For some commands, however, since the Active LED goes off for only a

fraction of a second, the Active LED looks like it flashes or remains lit.

5.5.2

Checking connection

When the initial operation is checked normally after power is turned on, check that the IDD is

connected to the loop from the host system. Although checking the connection depends on the

structure of the host system, this section describes the general procedures.

(1)

Checking procedure

Issuing the commands and determining the end status depends on the start mode of the spindle motor

and UNIT ATTENTION report mode (specified with setting terminal). Figure 5.1 shows the

recommended checking procedure for the mode that the motor starts when power is turned on.

Figure 5.2 shows for the mode that the motor starts by the START/STOP command. In these

recommended checking procedures, following items are checked.

Note:

Following steps a) to e) correspond to a) to e) in Figures 5.1 and 5.2.

a) Issue the TEST UNIT READY command and check that the IDD is connected correctly to

the loop and the initial operation after power is turned on ended normally. The command

issue period of the TEST UNIT READY command shall be more than 20 ms.

b) To control starting of the spindle motor from the host system, issue the START/STOP

UNIT command to start the spindle motor.

c) Check the loop operations with the WRITE BUFFER and READ BUFFER commands.

d) Start the IDD self-diagnostic test with the SEND DIAGNOSTIC command and check the

basic operations of the controller and disk drive.

C141-E198

5-7

Installation

Motor starts when power is turned on

(60

Figure 5.1 Checking the IDD connection (A)

5-8

C141-E198

5.5 Checking Operation after Installation and Preparing the IDD for Use

Motor starts by START/STOP command

* Executing time: about 60 seconds

Figure 5.2 Checking the IDD connection (B)

C141-E198

5-9

Installation

(2)

Checking at abnormal end

a) When sense data can be obtained with the REQUEST SENSE command, analyze the sense data

and retry recovery for a recoverable error. Refer to Chapter 5 of Fibre Channel Interface

Specifications for further details.

b) Check the setting of the terminals. Note that the checking procedure of loop connection differs

depending on the setting of the motor start mode and UNIT ATTENTION report mode.

5.5.3

Formatting

Since the disk drive is formatted with a specific (default) data format for each model (part number)

when shipped from the factory, the disk need not be formatted (initialized) when it is installed in the

system.

However, when the system needs data attributes different from the default format, all sides of the disk

must be formatted (initialized) according to the procedures below.

The user can change the following data attributes at initialization:

•

Logical data block length

Number of logical data blocks or number of cylinders in the user space

Alternate spare area size

This section outlines the formatting at installation. Refer to Chapters 3 and 6 of Fibre Channel

Interface Specifications for further details.

(1)

MODE SELECT/MODE SELECT EXTENDED command

Specify the format attributes on the disk with the MODE SELECT or MODE SELECT EXTENDED

command. The parameters are as follows.

a. Block descriptor

Specify the size (byte length) of the logical data block in the "data block length" field. To

explicitly specify the number of logical data blocks, specify the number in the "number of data

blocks" field. Otherwise, specify 0 in "number of data blocks" field. In this case, the number of

logical data blocks after initialization is determined by the value specified in the format

parameter (page code = 3) and drive parameter (page code = 4).

b. Format parameter (page code = 3)

Specify the number of spare sectors for each cell in the "alternate sectors/zone" field and specify

the number of tracks for alternate cylinders (= number of alternate cylinders × number of disk

drive heads) in the "alternate tracks/zone" field. It is recommended not to specify values smaller

than the IDD default value in this field.

5-10

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5.5 Checking Operation after Installation and Preparing the IDD for Use

(2)

FORMAT UNIT command

Initialize all sides of the disk with the FORMAT UNIT command. The FORMAT UNIT command

initializes all sides of the disk using the P lists, verifies data blocks after initialization, and allocates

an alternate block for a defect block detected with verification. With initialization, the value "00" is

written into all bytes of all logical data blocks. Only the position information of defect blocks

detected with verification is registered in the G list. The specifications are as follows:

a. Specifying CDB

Specify 0 for the "FmtData" bit and the "CmpLst" bit on CDB, 000 for the "Defect List Format"

field, and data pattern written into the data block at initialization for the "initializing data pattern"

field.

b. Format parameter

When the values in step a. are specified with CDB, the format parameter is not needed.

C141-E198

5-11

Installation

5.5.4

Setting parameters

The user can specify the optimal operation mode for the user system environments by setting the

following parameters with the MODE SELECT or MODE SELECT EXTENDED command:

•

Error recovery parameter

Disconnection/reconnection parameter

Caching parameter

Control mode parameter

With the MODE SELECT or MODE SELECT EXTENDED command, specify 1 for the "SP" bit on

CDB to save the specified parameter value on the disk. This enables the IDD to operate by using the

parameter value set by the user when power is turned on again. When the system has more than one

INIT, different parameter value can be set for each INIT.

When the parameters are not set or saved with the MODE SELECT or MODE SELECT

EXTENDED command, the IDD sets the default values for parameters and operates when power is

turned on or after reset. Although the IDD operations are assured with the default values, the

operations are not always optimal for the system. To obtain the best performance, set the parameters

in consideration of the system requirements specific to the user.

This section outlines the parameter setting procedures. Refer to Chapter 3 of Fibre Channel Interface

Specifications for further details of the MODE SELECT and MODE SELECT EXTENDED

commands and specifying the parameters.

1. At factory shipment of the IDD, the saving operation for the MODE

SELECT parameter is not executed. So, if the user does not set

parameters, the IDD operates according to the default value of each

parameter

2. The model select parameter is not saved for each Loop ID of but as the

common parameter for all IDs. In the multi-INIT System, parameter

setting cannot be changed for each INIT.

3. Once parameters are saved, the saved value is effective as long as next

saving operation is executed from the INIT. For example, even if the

initialization of the disk is performed by the FORMAT UNIT command,

the saved value of parameters described in this section is not affected.

4. When the IDD, to which the saving operation has been executed on a

system, is connected to another system, the user must pay attention to

that the IDD operates according to the saved parameter value if the

saving operation is not executed at installation.

5. The saved value of the MODE SELECT parameter is assumed as the

initial value of each parameter after the power-on, the RESET condition,

or the BUS DEVICE RESET message. The INIT can change the

parameter value temporary (actively) at any timing by issuing the MODE

SELECT or MODE SELECT EXTENDED command with specifying "0"

to the SP bit in the CDB.

5-12

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5.5 Checking Operation after Installation and Preparing the IDD for Use

(1)

Error recovery parameter

The following parameters are used to control operations such as IDD internal error recovery:

a. Read/write error recovery parameters (page code = 1)

Parameter

Default value

1 (enabled)

• AWRE:

• ARRE:

Automatic alternate block allocation at Write

operation

Automatic alternate block allocation at read

operation

1 (enabled)

• TB:

Uncorrectable data transfer to the INIT

Immediate correction of correctable error

Report of recovered error

1 (enabled)

0 (disabled)

0 (Correction is

enabled.)

• EER:

• PER:

• DCR:

Suppression of ECC error correction

• Retry count at read operation

• Retry count at write operation

• Recovery time limit

30 sec

b. Verify error recovery parameters (page code = 7)

Parameter

Default value

• ERR:

• PER:

• DTE:

Immediate correction of recoverable error

Report of recovered error

Stop of command processing at successful

error recovery

1 (enabled)

0 (disabled)

0 (Processing is

continued.)

• DCR:

Suppression of ECC error correction

0 (Correction is

enabled.)

• Retry count at verification

c. Additional error recovery parameters (page code = 21)

Parameter

Default value

• Retry count at seek error

C141-E198

5-13

Installation

Notes:

1. The user can arbitrarily specify the following parameters according to the system

requirements:

•

ARRE

AWRE

•

PER

2. The user also can arbitrarily specify parameters other than the above. However, it is

recommended to use the default setting in normal operations.

(2)

Disconnection/reconnection parameters (page code = 2)

The following parameters are used to optimize the start timing of reconnection processing to transfer

data on the loop at a read (READ or READ EXTENDED command) or write operation (WRITE,

WRITE EXTENDED, or WRITE AND VERIFY command) of the disk. Refer to Chapter 2 of Fibre

Channel Interface Specifications for further details.

Parameter

Default value

00 (HEX)

• Buffer full ratio

• Buffer empty ratio

00 (HEX)

Notes:

1. In a system without the disconnection function, these parameters need not be specified.

2. Determine the parameter values in consideration of the following performance factors of the

system:

•

Time required for reconnection processing

Average amount of processing data specified with a command

Refer to Chapter 2 of Fibre Channel Interface Specifications for how to obtain the rough

calculation values for the parameter values to be set. It is recommended to evaluate the

validity of the specified values by measuring performance in an operation status under the

average system load requirements.

5-14

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5.5 Checking Operation after Installation and Preparing the IDD for Use

(3)

Caching parameters

The following parameters are used to optimize IDD Read-Ahead caching operations under the system

environments. Refer to Chapter 2 of Fibre Channel Interface Specifications for further details.

Parameter

Initiator control

Default value

• IC:

0 (Drive-specific

control (page

cache))

• RCD:

• WCE:

• MS:

Disabling Read-Ahead caching operations

Write Cache Enable

0 (enabled)

1 (enabled)

Specifying the multipliers of "minimum

0 (Specifying

prefetch" and "maximum prefetch" parameters

absolute value)

• DISC:

Prefetch operation after track switching during

prefetching

1 (enabled)

• Number of blocks for which prefetch is suppressed

• Minimum prefetch

X'FFFF'

X'0000'

• Maximum prefetch

X' XXXX'

(1 cache segment)

• Number of blocks with maximum prefetch restrictions

• Number of segments

X'FFFF'

X'08'

Notes:

1. When Read-Ahead caching operations are disabled by the caching parameter, these

parameter settings have no meaning except write cache feature.

2. Determine the parameters in consideration of how the system accesses the disk. When the

access form is not determined uniquely because of the processing method, the parameters

can be re-set actively.

3. For sequential access, the effective access rate can be increased by enabling Read-Ahead

caching operations and Write Cache feature.

(4)

Control mode parameters

The following parameters are used to control the tagged queuing and error logging.

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5-15

Installation

a. Control mode parameters

Parameter

• Queue algorithm modifier

Default value

0 (Execution

sequence of

read/write

commands is

optimized.)

• QErr:

Resume or abort remaining suspended

commands after sense pending state

0 (command is

resumed)

• DQue:

Disabling tagged command queuing

0 (enabled)

5.6

Spare Disk Drive

See Subsection 2.1.1, “Model name and order number,” to order a disk drive for replacement or as a

spare

5-16

C141-E198

CHAPTER 6

Diagnostics and Maintenance

6.1 Diagnostics

6.2 Maintenance Information

6.3 Operation Check

6.4 Troubleshooting Procedures

This chapter describes diagnostics and maintenance information.

6.1

Diagnostics

6.1.1

Self-diagnostics

The IDD has the following self-diagnostic function. This function checks the basic operations of the

IDD.

•

Initial self-diagnostics

Online self-diagnostics (SEND DIAGNOSTIC command)

Table 6.1 lists the contents of the tests performed with the self-diagnostics. For a general check of

the IDD including the operations of the host system and interface, use a test program that runs on the

host system (see Subsection 6.1.2).

Table 6.1

Self-diagnostic functions

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6-1

Diagnostics and Maintenance

Brief test contents of self-diagnostics are as follows.

a. Hardware function test

This test checks the basic operation of the controller section, and contains following test.

•

RAM (microcode is stored)

Peripheral circuits of microprocessor (MPU)

Memory (RAM)

Data buffer

b. Seek test

This test checks the positioning operation of the disk drive using several seek modes (2 points

seek, 1 position sequential seek, etc.). The positioning operation is checked with confirming the

physical address information by reading the ID field (LBA) from the data block on track 0 after

completion of the seek operation to the target cylinder.

c. Write/read test

This test checks the write/read function by using the Internal test space of the disk drive.

(1)

Initial self-diagnostics

When power is turned on, the IDD starts initial self-diagnostics. The initial self-diagnostics checks

the basic operations of the hardware functions.

If an error is detected in the initial self-diagnostics, the IDD sends the Fault LED Out signal to the

interface connector. In this status, the IDD posts the CHECK CONDITION status to all I/O

operation requests other than the REQUEST SENSE command. When the CHECK CONDITION

status is posted, the INIT should issue the REQUEST SENSE command. The sense data obtained

with the REQUEST SENSE command details the error information detected with the initial self-

diagnostics.

Even if CHECK CONDITION status and sense data are posted, the IDD continues sending the Fault

LED Out signal to the interface connector. Only when the power is turned off or re-turned on, this

status can be cleared. When this status is cleared, the IDD executes the initial self-diagnosis again.

6-2

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6.1 Diagnostics

The IDD does not reply to the loop for up to 2 seconds after the initial self-diagnostics is started.

After that, the IDD can accept the I/O operation request correctly, but the received command, except

the executable commands under the not ready state (such as INQUIRY, START/STOP UNIT), is

terminated with the CHECK CONDITION status (NOT READY [=2]/Logical unit is in process of

becoming ready [=04-01] or Logical unit not ready, initializing command required [=04-02]) during

the interval from the spindle motor becomes stable to the IDD becomes ready. The executable

command under the not ready state is executed in parallel with the initial self-diagnostics, or is

queued by the command queuing feature and is executed after completion of the initial self-

diagnostics. When the command that comes under the exception condition of the command queuing

is issued at that time, the IDD posts the BUSY status for the command. When the error is detected

during the initial self-diagnostics, the CHECK CONDITION status is posted for all commands that

were stacked during the initial self-diagnostics. For the command execution condition, refer to

Section 1.4 and Subsection 1.7.4 in Fibre Channel Interface Specifications.

(2)

Online self-diagnostics (SEND DIAGNOSTIC command)

The INIT can make the IDD execute self-diagnostics by issuing the SEND DIAGNOSTIC command.

The INIT specifies the execution of self-diagnostics by setting 1 for the SelfTest bit on the CDB in the

SEND DIAGNOSTIC command and specifies the test contents with the UnitOfl bit.

When the UnitOfl bit on the CDB is set to 0, the IDD executes the hardware function test only once.

When UnitOfl bit is set to 1, the IDD executes the hardware function test, seek (positioning) test, and

data write/read test for the Internal test space only once.

a. Error recovery during self-diagnostics

During the self-diagnostics specified by the SEND DIAGNOSTIC command, when the

recoverable error is detected during the seek or the write/read test, the IDD performs the error

recovery according to the MODE SELECT parameter value (read/write error recovery parameter,

additional error recovery parameter) which the INIT specifies at the time of issuing the SEND

DIAGNOSTIC command.

PER

Operation of self-diagnostics

The self-diagnostics continues when the error is recovered. The self-

diagnostics terminates normally so far as the unrecoverable error is not

detected.

The self-diagnostics continues when the error is recovered. If the

unrecoverable error is not detected, the consecutive tests are executed till last

test but the self-diagnostics terminates with error. The error information

indicates that of the last recovered error.

b. Reporting result of self-diagnostics and error indication

When all specified self-diagnostics terminate normally, the IDD posts the GOOD status for the

SEND DIAGNOSTIC command.

When an error is detected in the self-diagnostics, the IDD terminates the SEND DIAGNOSTIC

command with the CHECK CONDITION status.

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6-3

Diagnostics and Maintenance

The INIT should issue the REQUEST SENSE command when the CHECK CONDITION status

is posted. The sense data collected by the REQUEST SENSE command indicates the detail

information of the error detected in the self-diagnostics.

The IDD status after the CHECK CONDITION status is posted differs according to the type of

the detected error.

a) When an error is detected in the seek or write/read test, the subsequent command can be

accepted correctly. When the command other than the REQUEST SENSE and NO

OPERATION is issued from the same INIT, the error information (sense data) is cleared.

b) When an error is detected in the hardware function test, the IDD posts the CHECK

CONDITION status for all I/O operation request except the REQUEST SENSE command.

The error status is not cleared even if the error information (sense data) is read. Only when

the power is turned off or re-turned on, the status can be cleared. When this status is

cleared, the IDD executes the initial self-diagnostics again (see item (1)).

Refer to Chapter 3 of Fibre Channel Interface Specifications for further details of the command

specifications.

Data loss

When the SEND DIAGNOSTIC command terminates with the CHECK

CONDITION status, the INIT must collect the error information using

the REQUEST SENSE command. The RECEIVE DIAGNOSTIC

RESULTS command cannot read out the error information detected in

the self-diagnostics.

6.1.2

Test programs

The basic operations of the IDD itself can be checked with the self-diagnostic function. However, to

check general operations such as the host system and interface operations in a status similar to the

normal operation status, a test program that runs on the host system must be used.

The structure and functions of the test program depend on the user system requirements. Generally,

it is recommended to provide a general input/output test program that includes devices connected to

the loop and input/output devices on other I/O ports.

Including the following test items in the test program is recommended to test the IDD functions

generally.

6-4

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6.2 Maintenance Information

(1)

(2)

(3)

(4)

Interface (loop) test

The operations of the loop and data buffer on the IDD are checked with the WRITE BUFFER and

READ BUFFER commands.

Basic operation test

The basic operations of the IDD are checked by executing self-diagnosis with the SEND

DIAGNOSTIC command (see Subsection 6.1.1).

Random/sequential read test

The positioning (seek) operation and read operation are tested in random access and sequential

access modes with the READ, READ EXTENDED, or VERIFY command.

Write/read test

By using a data block in the internal test space, the write/read test can be executed with an arbitrary

pattern for a disk drive in which user data is stored.

6.2

Maintenance Information

6.2.1

Precautions

Take the following precautions to prevent injury during maintenance and troubleshooting:

1. To avoid injury, do not touch the mechanical assembly during disk drive

operation.

2. Do not use solvents to clean the disk drive.

Take the following precautions to prevent disk drive damage during maintenance and

troubleshooting:

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6-5

Diagnostics and Maintenance

1. Always ground yourself with a wrist strap connected to ground before

handling. ESD (Electrostatics Discharge) may cause the damage to the

device.

2. Do not remove a PCA.

3. Do not use a conductive cleaner to clean a disk drive assembly.

6.2.2

Maintenance requirements

(1)

Preventive maintenance

Preventive maintenance such as replacing air filters is not required.

Damage

Never open the disk enclosure in the field. Opening the disk enclosure

in the field may cause an irreparable fault.

(2)

Service life

See "(3) Service life," in Section 2.1.5.

6-6

C141-E198

6.2 Maintenance Information

(3)

(4)

Parts that can be replaced in the field

The PCA cannot be replaced in the field. The DE cannot be replaced in the field.

Service system and repairs

Fujitsu has the service system and repair facility for the disk drive. Contact Fujitsu representative to

submit information for replacing or repairing the disk drive. Generally, the following information

must be included:

a) IDD model, part number (P/N), revision number, serial number (S/N), and date of manufacturing

b) Error status

•

Date when the error occurred

System configuration

Environmental conditions (temperature, humidity, and voltage)

c) Error history

d) Error contents

•

Outline of inconvenience

Issued commands and specified parameters

Sense data

Other error analysis information

Data loss

Save data stored on the disk drive before requesting repair. Fujitsu

does not assume responsibility if data is destroyed during servicing or

repair.

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6-7

Diagnostics and Maintenance

See Section 5.1 for notes on packing and handling when returning the disk drive.

6.2.3

Maintenance levels

If a disk drive is faulty, replace the whole disk drive since repair requires special tools and

environment. This section explains the two maintenance levels.

(1)

Field maintenance (disk drive replacement)

•

This replacement is done at the user's site.

Replacement uses standard tools.

Replacement is usually done by the user, retail dealer, distributor, or OEM engineer.

(2)

Factory maintenance (parts replacement)

•

This replacement can only be done by Fujitsu.

Replacement includes maintenance training and OEM engineer support. OEM engineers usually

support retail dealers and distributors.

•

Replacement uses factory tools and test equipment.

6-8

C141-E198

6.2 Maintenance Information

6.2.4

Revision numbers

The revision number of the disk drive is represented with a letter and a number indicated on the

revision label attached to the DE. Figure 6.1 shows the revision label format.

Figure 6.1 Revision label (example)

(1)

(2)

Indicating revision number at factory shipment

When the disk drive is shipped from the factory, the revision number is indicated by deleting

numbers in the corresponding letter line up to the corresponding number with = (see Figure 6.2).

Changing revision number in the field

To change the revision number because parts are replaced or other modification is applied in the

field, the new level is indicated by enclosing the corresponding number in the corresponding letter

line with ¡ (see Figure 6.2).

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6-9

Diagnostics and Maintenance

When the revision number is changed after the drive is shipped from

the factory, Fujitsu issues "Engineering Change Request/Notice" in

which the new revision number is indicated. When the user changes

the revision number, the user should update the revision label as

described in item (2) after applying the modification.

At shipment

Rev. A2

Revising at field

Rev. A3

Figure 6.2 Indicating revision numbers

6.2.5

6.2.6

Tools and test equipment

Disk drive troubleshooting and repair in the field require only standard hand tools. No special tools

or test equipment are required.

This manual does not describe the factory-level tools and test equipment.

Tests

This disk drive can be tested in the following ways:

•

Initial seek operation check (See Subsection 6.3.1)

Operation test (See Subsection 6.3.2)

Diagnostic test (See Subsection 6.3.3)

Figure 6.3 shows the flow of these tests.

6-10

C141-E198

6.2 Maintenance Information

Start

Start self-test by

turning the power on

Check host system

(Table 6.2)

Test results OK?

Yes

Analyze system-related

error

Host system

normal?

Execute an operation

test using a host

computer or test

equipment

Yes

Replaced or repair

disk drive

Test results OK?

Disk drive

normal?

Yes

Continue operation

Execute diagnostic

test using a host

computer or test

equipment

Test results OK?

Yes

Test using voltage or

temperature stress

Analyze disk drive

error (Table 6.3)

Test results OK?

Yes

Normal

Figure 6.3 Test flowchart

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6-11

Diagnostics and Maintenance

6.3

Operation Check

6.3.1

Initial seek operation check

If an error is detected during initialization by the initial seek operation check routine at power-on, the

IDD sends the Fault LED Out signal to the interface connector. The spindle motor of the disk drive

then stops, and the disk drive is unusable.

For an explanation of the operation check before the initial seek, refer to the Section 5.5.

6.3.2

Operation test

While the host computer is processing data, the IDD monitors disk drive operation including data

processing, command processing, and seek operations. If the IDD detects an error, the IDD posts the

error to the INIT. The INIT then posts the error to the user.

The user may detect an intermittent or nonfatal error such as abnormal noise, abnormal odor, or very

slow operation.

An error posted in an operation test must be investigated. Replace the disk drive to see whether the

error was caused by the disk drive.

Often, errors posted in an operation test may be caused by the host system. Possible causes include

insufficient power capacity, loose cable connection, insufficient timing or insufficient mechanical

play, and problems related to other systems.

If an operation error is detected by the error detection circuit of the disk drive, an interrupt occurs.

The interrupt is posted to the MCU on the PCA. The MCU stops the currently processed command,

and causes the CHECK CONDITION status to post the error to the INIT.

When receiving the CHECK CONDITION status, the INIT issues a REQUEST SENSE command to

collect detailed information about the error. The INIT then issues a REZERO UNIT command to

return the read/write head to track 00. In normal processing, the IDD itself or INIT determines how

to handle the error (processing retry or stop).

To analyze the error posted in the operation test, reconstruct the conditions in which the error

occurred. Then, start troubleshooting the whole host system by replacing the disk drive.

6.3.3

Diagnostic test

The diagnostic test is executed to find a faulty subassembly in a faulty disk drive, or to check disk

drive performance. This test is usually a combination of specific disk drive functions or group of

functions. This test may be executed using a different host computers or test equipment and away

from the environment where the error first occurred.

To analyze the error posted in the diagnostic test, reconstruct the conditions in which the error

occurred. Then, look for a possibly faulty subassembly or part of the disk drive.

The procedures to be used in this test depend largely on the type of test equipment used, and are not

covered by this manual.

6-12

C141-E198

6.4 Troubleshooting Procedures

6.4

Troubleshooting Procedures

6.4.1

Outline of troubleshooting procedures

This section explains the troubleshooting procedures for disk drive errors.

Depending on the maintenance level, analyze the error to detect a possibly faulty part (disk drive, or

disk drive part).

Full-scale troubleshooting is usually required if the error cause is not known. If the error cause is

clear (e.g., abnormal noise in disk enclosure or burning of a PCA), troubleshooting is straightforward.

6.4.2

Troubleshooting with disk drive replacement in the field

At this level of maintenance, we recommend replacing the disk drive as a unit. If replacing the disk

drive rectifies the fault, return the removed disk drive to the factory, for test and repair. If the newly

installed disk drive does not rectify the fault another part of the system is faulty.

Table 6.2 summarizes system-level field troubleshooting. Troubleshooting must be done in the field,

to find faulty part (disk drive or system).

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6-13

Diagnostics and Maintenance

Table 6.2

System-level field troubleshooting

Item

DC power level

Recommended work

Check that the DC voltage is within the specified range ( 5%).

Check that the +5 VDC value (pin of the interface connector) is 4.75 to

5.25 VDC.

Check that the +12 VDC supply (pin of the interface connector of disk

drive) is 11.4 to 12.6 VDC.

Electrical noise

Make sure the maximum ripple peak-to-peak value of +5 VDC is within

250 mV and +12 VDC is within 250 mV.

Make sure the high frequency noise (over 20 MHz) is less than

100 mVp-p.

Drive selection address

System cables

Check that the disk drive selection address is set correctly.

Check that all system cables are connected correctly.

System diagnostic test

When possible, execute the system level diagnostic routine as explained

in the host computer manual. This gives a detailed report of a possible

fault.

Intermittent or nonfatal errors

Check the AC voltage from the power supply. Check the DC voltage

level at the power connector for the disk drive.

If the AC voltage level is abnormal or there is a lot of electrical noise,

notify the user of the error.

If the DC voltage level is unstable, replace the power supply unit.

If possible, replace the disk drive. If replacing the disk drive does not

eliminate the error, the removed disk drive is probably not faulty. To

continue error analysis, refer to the hardware and software manuals

supplied with the system.

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6.4 Troubleshooting Procedures

6.4.3

Troubleshooting at the repair site

For maintenance at this level, we recommend additional testing of the disk drive and signal checking.

The sense data posted from the IDD helps with troubleshooting. This sense data makes the error type clear

(functional, mechanical, or electrical error). Chapter 7 error analysis by sense data, and gives

supplementary information on finding the error cause (faulty part).

Table 6.3 lists how to detect a faulty disk drive subassembly. This fault finding requires a working

host computer or disk drive test equipment to recreate the error conditions.

If the detected error cannot be recreated in an ordinary test, disk drive conditions can be changed to

force the error to recur. This is done by changing the DC voltage or the ambient temperature of the

disk drive.

If the error does not recur with changed conditions, the disk drive is not faulty. If no error occurs in

the disk drive test, notify the user of the test results, and find out from the user the environment

conditions where the disk drive is used.

Table 6.3

Disk drive troubleshooting

Recommended action

Item

Frequent or repeated seek errors

Collect sense data, and see Chapter 7.

Replace the disk drive, and check that the test method is correct. If the

error recurs, it is likely that the disk drive is normal but the test method

is incorrect.

Intermittent or nonfatal errors

Replace the disk drive, and check that the test method is correct. If the

error recurs, it is likely that the disk drive is normal but the test method

is incorrect.

To check performance, change the disk drive conditions by changing

the voltage or temperature.

If the disk drive error recurs or a possibly faulty part is found by troubleshooting, return the complete

disk drive to the factory for repair. A media defect list must be included with a disk drive returned to

the factory.

If the possibly faulty part is the disk enclosure, return the whole disk drive to the factory for repair.

Also if a clear error (erroneous servo track information or noisy drive) is detected in the disk

enclosure, return the whole disk drive to the factory. A media defect list must be included with a disk

drive returned to the factory.

Damage

Never open the disk enclosure in the field. Opening the disk enclosure

may cause an irreparable fault.

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6-15

Diagnostics and Maintenance

6.4.4

Troubleshooting with parts replacement in the factory

This manual does not cover troubleshooting at the factory level.

6.4.5

Finding possibly faulty parts

Finding possibly faulty parts in the field was explained in Subsection 6.4.2. This manual does not

cover finding possibly faulty parts at the factory level.

6-16

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CHAPTER 7

Error Analysis

7.1 Error Analysis Information Collection

7.2 Sense Data Analysis

This chapter explains in detail how sense data collected from a disk drive is used for troubleshooting. Sense

data reflects an error in the disk drive, and helps with troubleshooting.

A sense key, sense code, and subsense code, taken from various sense data are repeated. Also in this chapter,

troubleshooting is performed using these three codes. Unless otherwise specified, "sense data" means the

above three codes. When sense data is represented as (x-xx-xx), the leftmost x is a sense key, the middle xx is

a sense code, and the rightmost x is a subsense code.

7.1

Error Analysis Information Collection

Sense data

7.1.1

When IDD posts a CHECK CONDITION status or detects a fatal error in the loop, the current

command or queued command is cleared. In such a case, the IDD generates sense data about the

command-issuing INIT. The INIT can read the sense data by issuing a REQUEST SENSE

command.

Even if a transfer byte length that is shorter than the sense data length of the tested device is

specified, the command terminates normally. In this case, however, the INIT receives part of the

sense data, but the remaining part of the sense data is lost.

For details of the REQUEST SENSE command, refer to the Fibre Channel Interface Specifications.

7.1.2

Sense key, sense code, and subsense code

If an error is detected in a disk drive, the error status is indicated in the sense data collected from the

disk drive. Figure 7.1 shows the positions of a sense key, sense code, and subsense code.

C141-E198

7-1

Error Analysis

Bit 7

Byte 0 Valid

X‘70’ or X‘71’ (error code)

X‘00’

ILI

Sense key

[MSB]

Information

[LSB]

X‘28’ (additional sense data length)

Command-specific information

Basic

information

[MSB]

[LSB]

Sense code

Subsense code

X‘00’

15 SKSV

Sense key-specific information

SCSI ID

CDB operation code

Additional

information

Detail information

Figure 7.1 Format of extended sense data

7-2

C141-E198

7.2 Sense Data Analysis

7.2

Sense Data Analysis

7.2.1

Error information indicated with sense data

Subsection 7.2.2 onwards explain troubleshooting using sense data.

Table 7.1 lists the definition of sense data. For details of sense data, refer to the Fibre Channel

Interface Specifications.

Table 7.1

Definition of sense data

Sense data

Sense

key

Sense

Code

Sub

Sense

Code

Definition

Operation was normal.

A write to a disk terminated abnormally.

Failed to update the defect list due to a disk medium write error, etc.

An error occurred in power-on self-diagnosis.

A hardware error occurred inside IDD.

A drive error occurred.

A disk read error occurred.

Data discrepancy found by VERIFY command byte check.

A SCSI error, such as an invalid operation code, occurred.

The Reserve bit of the IDENTIFY message was set to 1.

A CRC error occurred in the fibre channel loop.

An unmounted or inappropriate message was received.

Before completion of a command, a command with the same tag

number was issued.

An overlap command was issued.

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7-3

Error Analysis

7.2.2

Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)

Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx) indicate one of the following:

•

A target sector could not be detected using the sector counter.

A seek process overran the specified time.

A write to a disk terminated abnormally.

An error occurred in power-on self-diagnosis.

A hardware error occurred inside IDD.

A drive error occurred.

The symptoms above are generally caused by an error in a PCA or DE.

For details of the sense data above, refer to the Fibre Channel Interface Specifications.

7.2.3

Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error

If sense data (1-1x-xx), (3-1x-xx) or (E-1D-00) occurs frequently in a specific block of a disk, there

is disk damage that was not recorded in the media defect list. In this case, assign an alternate block

to the error-detected block using a REASSIGN BLOCKS command. For an explanation of the

REASSIGN BLOCKS command, refer to the Fibre Channel Interface Specifications.

If this error occurs in different blocks, a PCA or DE is faulty.

For details of the above sense data, refer to the Fibre Channel Interface Specifications.

7.2.4

Sense data (5-2x-xx), (5-3D-00), (B-47-xx), (B-49-00), (B-4D-xx) and (B-4E-00): fibre channel

interface error

Sense data (5-2x-xx), (5-3D-00), (B-47-xx), (B-49-00), (B-4D-xx) and (B-4E-00) indicates one of

the following symptoms:

•

An invalid or unsupported command was issued, or invalid or unsupported parameters were

specified.

•

A SCSI error occurred.

A CRC error occurred in the fibre channel loop.

If this error occurs, a PCA or the fibre channel interface is faulty.

For details of the above sense data, refer to the Fibre Channel Interface Specifications.

7-4

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APPENDIX A Connector Signal Allocation

A.1 Interface (FC-SCA) Connector Signal Allocation

This appendix describes the connector signal allocation.

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A-1

Connector Signal Allocation

A.1

Interface (FC-SCA) Connector Signal Allocation

Table A.1

FC-SCA connector: CN1

Pin No.

Signal

Pin No.

–EN bypass port A

+12V

+12V charge

GND

+12V

GND

+12V

+PortA_in

–PortA_in

GND

–Parallel ESI

–Drive present

Active LED out

–Spindle sync

Start_1/Mated

Start_2/Mated

–EN bypass port B

+PortB_in

–PortB_in

GND

+PortA_out

–PortA_out

GND

12*

13*

14*

15*

SEL-6

SEL-5

SEL-4

SEL-3

–DSK_WR

–DSK_RD

–ENCL_ACK

D(3)

+PortB-out

–PortB-out

GND

Fault LED out

SEL-2

SEL-1

SEL-0

D(2)

D(1)

D(0)

36*

37*

38*

DEV_CTRL_CODE2

DEV_CTRL_CODE1

+5V

DEV_CTRL_CODE0

+5V charge

Note: *1) Signal names in the right column of the table are those in parallel ESI operation.

A-2

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Glossary

CCS

CDB

Common Command Set

This is the standard form of SCSI logical specifications stipulated by the

operations subcommittee of the American National Standards Institute (ANSI)

which stipulates functions which a direct access device (magnetic disk, etc.)

should support.

Command Descriptor Block

A series of data which describes commands related to input/output operations,

sent from the initiator to the target.

Command

FC Device

Initiator (INIT)

SCSI

This is a command to a target to perform an input/output operation, and it is

described as the CDB.

The general name given to a device which is connected to the FC bus

(input/output device, I/O controller, host adapter, etc.).

This is a SCSI device which initiates input and output operations on the SCSI bus.

In this manual, initiator has been abbreviated to "INIT."

Small Computer System Interface

The standardized input/output interface of the American National Standards

Institute (ANSI). [Standard No.: ANSI X3. 131-1986]

Sense Code

Sense Data

This is a 1-byte code displayed in the sense data and is information which

specifies the type of error that was detected.

When several items of error information are included in a command's completion

status, this is information generated by the target for reporting detailed

information on that status.

Sense Key

Status

This is a 4-bit code displayed in the sense data. It contains information for

classifying the type of error that was detected.

This is 1 byte of information reported to the initiator by the target device when

execution of each command is completed, which displays the command's

completion state.

C141-E198

GL-1

Glossary

Target (TARG)

This is the FC device that executes the input/output operations initiated by the

initiator (INIT). In this manual, target is abbreviated "TARG."

GL-2

C141-E198

Acronyms and Abbreviations

DTE

Disable Transfer on Error

ACK

AEN

ALT

ACKnowledge

Asynchoronous Event Notification

ALTernated (block)

ECC

EER

Error Correction Code

Enable Early Recovery

EVPD Enable Vital Product Data

ARRE Automatic Read Reallocation

Enabled

ASCII American Standard Code for

Information Interchange

ASiGned block

ATTeNtion

ASG

ATN

FIFO

Frame Ground

First In First Out

AWG American Wire Gauge

AWRE Automatic Write Reallocation

Enabled

FmtData Format Data

FOV

FUA

Format Options Valid

Force Unit Access

bpi

BSY

bits per inch

BuSY

G list

Gap

BytChk Byte Check

Grown defect list

C list

C/D

CCS

CDB

Target Certification list

Control/data

Common command set

Common descriptor block

Customer Engineer

Height

HSEC Hard SECtor

CmpLst Complete List

I/O

IDD

ILBN

Input/Output

IDentifier

Intelligent Disk Drive

CRC

CSS

CYL

Cyclic Redundancy Check

Contact Start Stop

CYLinder

Ideal Logical Block Number

Immed Immediate

INDX/SCT

INDeX/SeCTor

Initialization Pattern

Depth

ISG

InterSector Gap

D list

DBD

Data Defect List

Disable Block Descriptor

Direct Current

DCR

Disable Correction

LBdata Logical Block data

DCRT Disable CeRtificaTion

DEF

DevOfl Device Offline

DPO Disable Page Out

DPRY Disable PRimarY

LBN

LED

LUN

Logical Block Number

Light Emitting Diode

Logical Unit Number

Disk Enclosure

DEFective block

DSP

Disable Saving Parameters

DTDC Data Transfer Disconnect Control

C141-E198

AB-1

Acronyms and Abbreviations

MSG

Magnetro Resistive

Multiple Select

MeSsaGe

TPI

TRM

Transfer Block

Tracks Per Inch

TeRMinator

OEM

Original Equipment Manufacturer

UnitOfl Unit Offline

P list

P/N

Primary defect list

Parts/Number

VCM

VPD

Voice Coil Motor

Vital Product Data

Vendor Unique

PBdata Physical Block data

PC boardPrinted Circuit board

PCA

PER

Printed Circuit Assembly

Post ERror

Page Format

WCE

Width

PLOSync Phase Lock Oscillator Syncronous

PMI Partial Medium Indicator

PR4ML Partial Response class 4 Maximum

Likelihood

Write Cache Enable

Write Protect

Read Continuous

Read Cache Disable

Request

Relative Humidity

ReMovaBle

RCD

REQ

RMB

RST

RSV

ReSeT

ReSerVed

S/N

Serial/Number

SBd

SBi

SCSI

SCT

SEL

Synchronized Byte data area

Synchronized Byte identifier area

Small Computer System Interface

SeCTor

SELect

SelfTest Self Test

SPR

Signal Ground

Save Page

SPaRe block

Servo

SSEC Soft SECtor

STPF SToP Format

SURF SURFace

AB-2

C141-E198

Index

+12 VDC ........................................................ 4-7

1-1x-xx ........................................................... 7-4

3-0C-03........................................................... 7-4

3-1x-xx ........................................................... 7-4

4-40-xx ........................................................... 7-4

4-44-xx ........................................................... 7-4

4-C4-xx........................................................... 7-4

5-2x-xx ........................................................... 7-4

5-3D-00 .......................................................... 7-4

checking operation after installation

and preparing IDD for use ........................ 5-6

checking procedure......................................... 5-7

checking IDD connection ........................5-8, 5-9

command queuing feature .............................. 1-3

compactness.................................................... 1-2

connection requirement .................................. 4-9

connector ........................................................ 4-9

continuous block processing........................... 1-2

controller circuit ............................................. 1-7

current waveform............................................ 4-7

cylinder configuration..................................... 3-1

AC noise filter ................................................ 4-8

actuator........................................................... 1-6

air circulation.................................................. 1-6

allowable input voltage and current................ 4-7

alternate area................................................. 3-10

alternate block allocation.............................. 3-11

alternate block allocation by

FORMAT UNIT command..................... 3-12

alternate block allocation by

REASSIGN BLOCKS command............ 3-13

alternate block allocation during

FORMAT UNIT command execution .... 3-12

alternate cylinder ............................................ 3-5

alternate spare area ......................................... 3-4

automatic alternate block allocation............. 3-14

automatic alternate block allocation

at read operation...................................... 3-14

automatic alternate block allocation

at write operation .................................... 3-14

automatic alternate block reassignment.......... 1-4

data field ......................................................... 3-8

data format...................................................... 3-1

data security at power failure.......................... 2-7

data space........................................................ 3-1

defect list....................................................... 3-11

defect management....................................... 3-11

defective block slipping.................................. 1-4

definition of sense data................................... 7-3

delivery........................................................... 5-2

diagnosis......................................................... 1-4

diagnostic........................................................ 6-1

diagnostic test ............................................... 6-12

diagnostics and maintenance .......................... 6-1

disconnection/reconnection parameter ......... 5-14

disk ................................................................. 1-5

disk drive replacement.................................... 6-8

disk drive troubleshooting ............................ 6-15

disk read error................................................. 7-4

disk/head configuration .................................. 1-6

dismounting drive........................................... 5-5

dual-port support ............................................ 1-2

B-47-xx........................................................... 7-4

B-49-00........................................................... 7-4

B-4D-xx.......................................................... 7-4

B-4E-00 .......................................................... 7-4

basic operation test ......................................... 6-5

BCRC ............................................................. 3-8

block address of user space .......................... 3-10

block descriptor ............................................ 5-10

E-1D-00 .......................................................... 7-4

ECC ................................................................ 3-8

enclosure service function .............................. 1-3

environmental specification............................ 2-4

environmental temperature............................. 4-5

environmental/power requirement.................. 2-4

error analysis................................................... 7-1

error analysis information collection.............. 7-1

error information indicated with sense data.... 7-3

error rate ......................................................... 2-5

error recovery ................................................. 1-3

error recovery during self-diagnostic.............. 6-3

error recovery parameter .............................. 5-13

cache feature................................................... 1-3

caching parameter......................................... 5-15

changing revision number in field.................. 6-9

checking at abnormal end............................. 5-10

checking connection....................................... 5-7

checking initial operation ............................... 5-6

C141-E198

IN-1

Index

example of FC-AL system configuration .......1-7

external dimension..........................................4-1

external magnetic field ...................................4-6

low power consumption..................................1-5

maintenance level ...........................................6-8

maintenance requirement................................6-6

microcode downloading..................................1-5

MODE SELECT/MODE

SELECT EXTENDED command ...........5-10

model name and order number .......................2-1

motor start mode.............................................5-3

mounting.........................................................4-3

mounting drive................................................5-4

mounting frame structure................................4-3

mounting procedure........................................5-4

mounting requirement.....................................4-1

MTBF..............................................................2-5

MTTR .............................................................2-6

factory maintenance........................................6-8

FC model drives outer view............................1-5

FC-AL standard ..............................................1-2

FC-SCA connector......................................... A-2

fibre channel interface error............................7-4

field maintenance............................................6-8

finding possibly faulty part...........................6-16

format capacity ...............................................3-9

format of extended sense data.........................7-2

format parameter..................................5-10, 5-11

FORMAT UNIT command ..........................5-11

formatting .....................................................5-10

function specification......................................2-2

noise filter .......................................................4-8

note on handling drive ....................................5-1

note on mounting ............................................4-3

gap ..................................................................3-8

general description..........................................1-1

general note.....................................................5-1

online self-diagnostic......................................6-3

operation check.............................................6-12

operation test.................................................6-12

other................................................................4-6

outline of troubleshooting procedure............6-13

hardware function test.....................................6-2

hardware specification....................................2-1

hardware structure ..........................................1-5

head.................................................................1-6

high speed positioning ....................................1-4

high-speed data transfer..................................1-2

packaging........................................................5-2

PAD ................................................................3-8

page code = 1................................................5-13

page code = 2................................................5-14

page code = 3................................................5-10

page code = 7................................................5-13

part replacement..............................................6-8

part that can be replaced in field.....................6-7

physical sector allocation................................3-5

PLO Sync........................................................3-8

positioning error rate.......................................2-5

power on/off sequence....................................4-7

power supply requirement ..............................4-7

precaution .......................................................6-5

preventive maintenance ..................................6-6

programmable data block length.....................1-4

programmable multi-segment data buffer.......1-2

indicating revision number ...........................6-10

indicating revision number at

factory shipment........................................6-9

initial seek operation check...........................6-12

initial self-diagnostic.......................................6-2

installation.......................................................5-1

installation requirement ..................................4-1

installation/removal/replacement....................5-2

interface connector signal allocation ............. A-2

interface test....................................................6-5

internal test space............................................3-4

large capacity..................................................1-4

leak magnetic flux...........................................4-6

limitation of bottom-mounting .......................4-5

limitation of side-mounting ............................4-4

logical data block addressing..........................3-9

loop.................................................................6-5

low noise and low vibration............................1-5

random/sequential read test.............................6-5

read/write circuit.............................................1-7

read/write error recovery parameter..............5-13

reliability.........................................................2-5

reporting result of self-diagnostic and error

indication...................................................6-3

IN-2

C141-E198

Index

reserve and release function ........................... 1-3

revision label .................................................. 6-9

revision number.............................................. 6-9

system-level field troubleshooting................ 6-14

take following action if problem occur........... 5-6

test ................................................................ 6-10

test flowchart ................................................ 6-11

test program.................................................... 6-4

tool and test equipment................................. 6-10

track format .................................................... 3-5

track skew and head skew............................... 3-6

track skew/head skew ..................................... 3-7

troubleshooting at repair site ........................ 6-15

troubleshooting with disk drive

sector format................................................... 3-7

seek test .......................................................... 6-2

self-diagnostic................................................. 6-1

SEND DIAGNOSTIC command.................... 6-3

sense data........................................................ 7-1

sense data analysis.......................................... 7-3

sense key, sense code, and subsense code...... 7-1

sequential starting of spindle motor................ 4-7

service clearance area..................................... 4-6

service life ...............................................2-6, 6-6

service system and repair................................ 6-7

setting parameter .......................................... 5-12

spare area in cell............................................. 3-5

spare disk drive............................................. 5-16

specification.................................................... 2-1

spindle motor.................................................. 1-6

standard feature .............................................. 1-2

start/stop of spindle motor.............................. 1-4

START/STOP UNIT command ..................... 5-6

storage ............................................................ 5-2

surface temperature check point..................... 4-5

surface temperature measurement point......... 4-5

sync mark ....................................................... 3-8

system configuration ...................................... 1-7

system space................................................... 3-4

replacement in field................................. 6-13

troubleshooting with part replacement

in factory................................................. 6-16

unpackaging.................................................... 5-2

unrecoverable error rate.................................. 2-5

user space........................................................ 3-3

verify error recovery parameter.................... 5-13

write/read test ..........................................6-2, 6-5

C141-E198

IN-3

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