Fujitsu MAB3091, MAC3091, MAC3045, MAA3182, MAB3045 User Manual

MAA3182 SERIES
MAB3091, MAB3045 SERIES
MAC3091, MAC3045 SERIES

DISK DRIVES

PRODUCT MANUAL

C141-E035-03EN

REVISION RECORD

Edition Date published Revised contents

01 Mar., 1997
02 Nov., 1997 Pages 1-2, 1-5 to 1-11, 2-2 to 2-5, 2-7, 3-2 to 3-4, 3-7 to 3-10, Chapter 4, 5-2, 5-3, 5-5 to

03 Jan., 1998 Pages 1-3, 1-4, 1-7 to 1-9, Chapter 2, 3-2 to 3-4, 3-6, 3-10, 4-4, 4-5, 4-7, 4-8, 4-10, 4-11,

5-10, 5-12 to 5-24, Chapter 6, Appendix A, C-1, C-2, D-2, Appendix E revised.

4-14, 4-22, 4-23, 4-27, 6-2, 6-3, D-2 revised.

Specification No.: C141-E035-**EN

The contents of this manual is subject to
change without prior notice.

All Rights Reserved.
Copyright  1998 FUJITSU LIMITED

C141-E035-03EN i

FOR SAFE OPERATION

Handling of This manual

This manual contains important information for using this product. Read thoroughly before
using the product. Use this product only after thoroughly reading and understanding
especially the section “Important Alert Items” in this manual. Keep this manual handy, and
keep it carefully.

FUJITSU makes every effort to prevent users and bystanders from being injured or from
suffering damange to their property. Use the product according to this manual.

Functional Limitations

There may be certain functional limitations concerning the specifications and functions of the
products covered by this manual depending on the equipment version, especially concerning
the following functions.

Versions in which there functions can be used will be communicated through
“ENGINEERING CHANGE REQUEST/NOTICE”, issued by Fujitsu.

Function Equipment Version Which Supports These Functions

Equipment

Version No.

READ RAM Command

These commands cannot be used in the current version.

WRITE RAM Command

EPROM

Version

No.

Standard INQUIRY Data Product
Revision (ASCII)

(Proceed to the Copyright Page)

C141-E035-03EN iii

Related Standards

Specifications and functions of products covered by this manual comply with the following
standards.

Standard (Text) No. Name Enacting Organization

ANSI X3.131-1986 American National Standard for

Information Systems—Small Computer
System Interface (SCSI)

ANSI X3.131-1994 American National Standard for

Information Systems—Small Computer
System Interface - 2(SCSI-2)

X3T9.2/85-52 Rev 4.B COMMON COMMAND SET (CCS)

of the Small Computer
System Interface (SCSI)

X3T9.2 855D Rev 12 WORKING DRAFT Information

Technology SCSI-3 Parallel Interface

X3T10/10T1D Rev 6 Dfaft proposed

American National Standard for
Information Systems—SCSI-3
Fast-20 Parallel Interface
(Fast 20-SCSI)

American National
Standards Institute
(ANSI)

American National
Standards Institute
(ANSI)

American National
Standards Institute
(ANSI)

American National
Standards Institute
(ANSI)

American National
Standards Institute
(ANSI)

All Right Reserved, Copyright © 1997, 1998 Fujitsu Limited

iv C141-E035-03EN

PREFACE

This manual describes the MAA3182xx (hereafter, MAA31xxxx), MAB3091xx, MAB3045xx
(hereafter, MAB30xxxx), MAC3091xx, MAC3045xx (hereafter, MAC30xxxx) series 3.5-inch fixed
disk drives with an embedded SCSI 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.

Chapter 1 GENERAL DESCRIPTION

This chapter introduces the MAA31xxxx, MAB30xxxx and MAC30xxxx series disk drives and
discusses their standard features, hardware, and system configuration.

Chapter 2 SPECIFICATIONS

This chapter gives detailed specifications of the MAA31xxxx, MAB30xxxx and MAC30xxxx 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 MAA31xxxx,
MAB30xxxx and MAC30xxxx series disk drives.

Chapter 5 INSTALLATION

This chapter explains how to install MAA31xxxx, MAB30xxxx and MAC30xxxx 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 DIAGNOSIS and MAINTENANCE

This chapter describes the automatic diagnosis, and maintenance of the MAA31xxxx, MAB30xxxx
and MAC30xxxx series disk drive.

APPENDIX A to E

The appendixes give supplementary information, including the locations of mounting setting terminals
and connectors, a list of setting items, the signal assignments of interface connectors, lists of model
names and product numbers, and SCSI interface functions.

The model numbers have a suffix that describes the electrical requirements of the SCSI interface
between host system and disk drive, the data formatted at the factory and device type.

C141-E035-03EN v

CONVENTIONS

This manual uses the following conventions for alerts to prevent physical or property damages to users
or by standards.

DANGER

DANGER indicates that personal injury will occur if the user does not perform the procedure

correctly.

WARNING

WARNING indicates that personal injury could occur if the user does not perform the procedure
correctly.

CAUTION

CAUTION indicates that either minor or moderate personal injury may occur if the user does not

perform the procedure correctly.

NOTICE

NOTICE indicates that inconvenience to the user such as damages to the product, equipment, data,
and/or other property may occur if the user does not pay attention or perform the procedure correctly.

IMPORTANT

IMPORTANT indicates information that the helps the user use the product more effectively.

Indicates

This manual indicates;

Decimal number: Indicates as it is.

Hexadecimal number: Indicates as X’17B9’, 17B9h, or 17B9H

Binary number: Indicates as “010”

vi C141-E035-03EN

DISCLAIMER

Failure of the MAA31xxxx, MAB30xxxx and MAC30xxxx series intelligent disk drive is defined as a
failure requiring adjustments, repairs, or replacement. Fujitsu is not responsible for drive failures
caused by misuse by the user, poor environmental conditions, power trouble, host problems, cable
failures, or any failure not caused by the drive itself.

The suffix of the model name of the disk drive varies depending on the electrical requirements,
capacity, and data format at factory shipment of the SCSI, i.e., the interface for connecting the three
device types or host system and the disk drives (Note 1). However, in this manual, the typical model
names (Note 2) are used unless otherwise noted. These disk drives may be called intelligent disk
drives (IDD), drives, or devices in this manual.

Note 1: Model names

M AA 3 182 SC

Interface types SP: Single-Ended, 16-bit SCSI

SC: Single-Ended, 16-bit SCSI SCA2 connector

Formatted capacity (100 MB units)

Disk size 3: 3.5 inch

Note 2: Type model name

Type model
name

MAA3182 MAA3182SP, MAA3182SC
MAB3091 MAB3091SP, MAB3091SC
MAB3045 MAB3045SP, MAB3045SC
MAC3091 MAC3091SP, MAC3091SC
MAC3045 MAC3045SP, MAC3045SC

Type AA: 1.6-inch height (7,200rpm)

AB: 1-inch height (7,200rpm)
AC: 1-inch height (10,033rpm)

Model name

C141-E035-03EN vii

MANUAL ORGANIZATION

PRODUCT

MANUAL

(This manual)

SCSI Physical

Interface

Specifications

SCSI Logical

Interface

Specifications

Maintenance

Manual

1. General Description

2. Specifications

3. Data Format

4. Installation Requirements

5. Installation

6. Diagnostics and Maintenance

1. SCSI Bus

2. SCSI Message

3. SCSI Bus Error Recovery Processing

1. Command Processing

2. Data Buffer Management

3. Command Specification

4. Sense Data and error Recovery Procedure

5. Disk Medium Management

1. Specifications and Equipment Configuration

2. Maintenance and Diagnostic

3. Error Analysis

4. Removal and Replacement Procedures

5. Principle of Operation

viii C141-E035-03EN

CONTENTS

page

CHAPTER 1 GENERAL DESCRIPTION..........................................................................1-1

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

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

1.3 System Configuration.....................................................................................................1-10

CHAPTER 2 SPECIFICATIONS......................................................................................... 2-1

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

2.1.1 Model name and part 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

2.2 SCSI Function Specifications......................................................................................... 2-7

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 ........................................................................................................ 3-5

3.1.3 Track format...................................................................................................................3-6

3.1.4 Sector format..................................................................................................................3-8

3.1.5 Format capacity..............................................................................................................3-10

3.2 Logical Data Block Addressing......................................................................................3-11

3.3 Defect Management........................................................................................................ 3-12

3.3.1 Defect list ................................................................ .......................................................3-12

3.3.2 Alternate block allocation...............................................................................................3-12

CHAPTER 4 INSTALLATION REQUIREMENTS .......................................................... 4-1

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

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

4.1.2 Mounting........................................................................................................................ 4-6

4.1.3 Notes on mounting.........................................................................................................4-6

4.2 Power Supply Requirements ................................................................ .......................... 4-11

C141-E035-03EN ix

4.3 Connection Requirements ................................................................ .............................. 4-14

4.3.1 Single-ended 16-bit SCSI model (MAA31xxSP, MAB30xxSP, MAC30xxSP) ............ 4-14

4.3.2 SCA2 type SCSI model (MAA31xxSC, MAB30xxSC, MAC30xxSC).........................4-22

4.3.3 Cable connector requirements ........................................................................................ 4-24

4.3.4 External operator panel...................................................................................................4-28

CHAPTER 5 INSTALLATION............................................................................................5-1

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

5.2 Connections....................................................................................................................5-3

5.3 Setting Terminals............................................................................................................ 5-5

5.3.1 SCSI ID setting................................................................ ...............................................5-7

5.3.2 Each mode setting ................................................................ ..........................................5-8

5.3.3 Write protect, terminating resistor setting....................................................................... 5-9

5.3.4 Mode settings ................................................................................................................. 5-10

5.4 Mounting Drives ................................................................ ............................................5-11

5.4.1 Check before mounting .................................................................................................. 5-11

5.4.2 Mounting procedures...................................................................................................... 5-11

5.5 Connecting Cables.......................................................................................................... 5-12

5.6 Confirming Operations after Installation and Preparation for use ................................ .. 5-13

5.6.1 Confirming initial operations.......................................................................................... 5-13

5.6.2 Checking SCSI connection.............................................................................................5-15

5.6.3 Formatting......................................................................................................................5-18

5.6.4 Setting parameters .......................................................................................................... 5-20

5.7 Dismounting Drives ....................................................................................................... 5-24

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 Maintenance requirements..............................................................................................6-5

6.2.2 Revision numbers...........................................................................................................6-7

APPENDIX A LOCATIONS OF CONNECTORS, SETTING TERMINALS, AND

TERMINATING RESISTORS......................................................................A-1

x C141-E035-03EN

A.1 Locations of Connectors and Setting Terminals

(MAx3xxxSC: SCA2 type 16-bit SCSI)......................................................................... A-2

A.2 Locations of Connectors and Setting Terminals

(MAx3xxxSP: single-ended type 16-bit SCSI)............................................................... A-3

APPENDIX B SETTING TERMINALS ................................................................................B-1

B.1 Setting Terminals (MAx3xxxSP: Single-ended 16-bit SCSI)......................................... B-2

APPENDIX C CONNECTOR SIGNAL ALLOCATION .................................................... C-1

C.1 SCSI Connector Signal Allocation: SCA2 type 16-bit SCSI.........................................C-2

C.2 SCSI Connector Signal Allocation: Single-ended type 16-bit SCSI.............................. C-3

APPENDIX D MODEL NAMES AND PRODUCT NUMBERS ......................................... D-1

D.1 Model Names and Product Numbers.............................................................................. D-2

APPENDIX E SCSI INTERFACE FUNCTIONS.................................................................E-1

E.1 SCSI interface function specifications............................................................................ E-2

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

C141-E035-03EN xi

FIGURES

page

1.1 MAA31xxSC outer view................................................................................................ 1-5

1.2 MAA31xxSP outer view ................................................................................................ 1-6

1.3 MAB30xxSC outer view................................................................................................ 1-6

1.4 MAB30xxSP outer view................................................................................................. 1-7

1.5 MAC30xxSC outer view................................................................................................ 1-7

1.6 MAC30xxSP outer view................................................................................................. 1-7

1.7 Disk/head configuration ................................................................................................. 1-8

1.8 System configuration................................................................ ......................................1-10

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

3.2 Spare area in cylinders....................................................................................................3-5

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

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

3.5 Track skew/cylinder skew .............................................................................................. 3-7

3.6 Sector format..................................................................................................................3-8

3.7 Alternate block allocation by FORMAT UNIT command ............................................. 3-14

3.8 Alternate block allocation by REASSIGN BLOCKS command................................ ..... 3-15

4.1 External dimensions (MAA31xxSC)................................................................ .............. 4-2

4.2 External dimensions (MAA31xxSP)..............................................................................4-3

4.3 External dimensions (MAB30xxSC, MAC30xxSC)...................................................... 4-4

4.4 External dimensions (MAB30xxSP, MAC30xxSP)....................................................... 4-5

4.5 IDD orientation............................................................................................................... 4-6

4.6 Mounting frame structure................................................................ ............................... 4-7

4.7 Limitation of side-mounting...........................................................................................4-7

4.8 Surface temperature measurement points (MAA31xxxx/MAB30xxxx/MAC30xxxx) .. 4-8

4.9 Service clearance area.....................................................................................................4-9

4.10 Air pressure adjustment hole..........................................................................................4-10

4.11 Current waveform (+12 VDC)................................ ........................................................4-11

4.12 Power on/off sequence (1).............................................................................................. 4-11

4.13 Power on/off sequence (2).............................................................................................. 4-12

4.14 Power on/off sequence (3).............................................................................................. 4-12

4.15 AC noise filter (recommended) ...................................................................................... 4-13

4.16 Connectors and terminals location (single-ended 16-bit SCSI)...................................... 4-14

xii C141-E035-03EN

4.17 16-bit SCSI interface connector................................ ......................................................4-15

4.18 Power supply connector (16-bit SCSI model) ................................................................ 4-15

4.19 External operator panel connector (CN1).......................................................................4-16

4.20 External operator panel connector (CN7).......................................................................4-17

4.21 16-bit SCSI ID external input......................................................................................... 4-18

4.22 Output signal for external LED ................................ ......................................................4-19

4.23 Cables connection (16-bit SCSI model) ......................................................................... 4-21

4.24 Connectors and terminals location of SCA2 type SCSI model....................................... 4-22

4.25 SCA2 type SCSI connector ............................................................................................ 4-23

4.26 SCSI cable connector...................................................................................................... 4-25

4.27 SCSI cable termination................................................................................................... 4-27

4.28 External operator panel circuit example (MAx3xxxSP)................................ ................. 4-28

5.1 SCSI bus connections..................................................................................................... 5-3

5.2 MAx3xxxSP setting terminals position.......................................................................... 5-5

5.3 Setting terminals (MAx3xxxSP)..................................................................................... 5-6

5.4 Checking the SCSI connection (A)................................................................................. 5-16

5.5 Checking the SCSI connection (B).................................................................................5-17

6.1 Revision label................................................................................................................. 6-7

6.2 Indicating revision numbers ........................................................................................... 6-8

A.1 Locations of connectors and setting terminals

(MAx3xxxSC, SCA2 type 16-bit SCSI)............................................................................A-2

A.2 Locations of connectors and setting terminals

(MAx3xxxSP, single-ended type 16-bit SCSI) ..................................................................A-3

C141-E035-03EN xiii

TABLES

page

2.1 Function specifications................................................................................................... 2-2

2.2 Environmental/power requirements................................................................................2-4

2.3 SCSI function specifications........................................................................................... 2-7

3.1 Zone layout and track capacity (MAA31xxxx) .............................................................. 3-3

3.2 Zone layout and track capacity (MAB30xxxx) .............................................................. 3-3

3.3 Zone layout and track capacity (MAC30xxxx) .............................................................. 3-3

3.4 Format capacity..............................................................................................................3-10

4.1 Surface temperature check point..................................................................................... 4-8

4.2 External inputs for operating terminating resistor (16-bit single-ended type) ................ 4-20

4.3 Recommended components for connection....................................................................4-24

4.4 Total cable length of SCSI cable .................................................................................... 4-26

4.5 SCSI cable requirements................................................................................................. 4-26

5.1 SCSI ID setting (single-ended 16-bit SCSI model: MAx3xxxSP)..................................5-7

5.2 Setting SCSI terminal power supply (single-ended 16-bit SCSI model: MAx3xxxSP) . 5-8

5.3 Motor start mode setting (single-ended 16-bit SCSI model: MAx3xxxSP) ................... 5-8

5.4 Write protect setting (single-ended 16-bit SCSI model: MAx3xxxSP).......................... 5-9

5.5 Setting of connection of terminating resistor on SCSI interface

(single-ended 16-bit SCSI model: MAx3xxxSP) ........................................................... 5-9

5.6 Default mode settings (by CHANGE DEFINITION command)..................................... 5-10

5.7 Setting check list (MAx3xxxSP)....................................................................................5-11

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

B.1 Setting terminal: CN6 (MAx3xxxSP)............................................................................ B-2

B.2 Setting terminal: CN7 (MAx3xxxSP)............................................................................ B-3

C.1 SCSI connector (SCA2 type, 16-bit SCSI): CN1........................................................... C-2

C.2 SCSI connector (single-ended type 16-bit SCSI): CN1................................................. C-3

D.1 MAA, MAB and MAC series model names and product numbers ................................D-2

E.1 SCSI interface function specifications............................................................................ E-2

xiv C141-E035-03EN

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 intelligent disk drives (IDD).

IDDs are high performance large capacity 3.5-inch fixed disk drives with an embedded SCSI
controller.

The interface between the IDD and host system is based on SCSI (Small Computer System Interface)
standard [ANSI X3.131 - 1986: Small Computer System Interface (SCSI), ANSI X3.131-1994: Small
Computer System Interface - 2 (SCSI-2)].

The flexibility and expandability of the SCSI, as well as the powerful command set of the IDD, allow
the user to construct a high-performance reliable disk subsystem with large storage capacity.

C141-E035-01EN 1 - 1

1.1 Standard Features

(1) Compactness

Since the SCSI controller circuit is embedded in the standard 3.5-inch fixed disk drive form
factor, the IDD is extremely compact. The IDD can be connected directly to the SCSI bus of
the host system .

(2) SCSI/CCS standard

The IDD provides not only SCSI basic functions but also the following features:

• Arbitration

• Disconnection/reselection

• Data bus parity

• Command set which meets the logical specification of the SCSI CCS (Common

Command Set for Direct Access Device) requirements (Rev. 4.B)

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) 8-bit SCSI/16-bit SCSI

The IDD has 16-bit data width (16-bit SCSI), which have the wide transfer function suitable
for SCSI-3.

• 8-bit SCSI: Up to eight SCSI devices can be connected on the same SCSI bus.

• 16-bit SCSI: Up to 16 SCSI devices can be connected on the same SCSI bus.

For the ultra SCSI model, number of connectable SCSI devices on the same SCSI bus is varied
as follows.

• Up to 4 SCSI devices having capacitance of 25 pF: Cable length of up to 3.0 m.

• 5 to 8 SCSI devices having capacitance of 25 pF: Cable length of up to 1.5 m

(4) High speed data transfer

• 8-bit SCSI: The data transfer rate on the 8-bit SCSI bus is 6 MB/s maximum in

asynchronous mode, 20 MB/s in synchronous mode.

• 16-bit SCSI: The data transfer rate on the 16-bit SCSI bus is 12 MB/s maximum in

asynchronous mode, 40 MB/s in synchronous mode.

Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in
the IDD.

C141-E035-02EN1 - 2

Note:

The maximum data transfer rate in asynchronous mode may be limited by the response
time of initiator and the length of SCSI bus length. The maximum data transfer rate in
synchronous mode on the single-ended SCSI bus may be limited by the cable length,
transmission characteristics of the SCSI bus and the connected SCSI device number.

(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) 512 KB programmable multi-segment data buffer

Data is transferred between SCSI bus and disk media through the embedded 512 KB data
buffer in the IDD. This buffer can be divided into maximum 16 areas. This feature provides
the suitable usage environment for users.

Since the initiator can control the disconnect/reconnect timing on the SCSI bus 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 SCSI bus regardless of actual data transfer rate of the disk drive.

(7) Read-ahead 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.

(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.

Recordering algorithm is adopted to prevent a specific command from staying in a queue for
more than 3 seconds.

(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.

C141-E035-03EN 1 - 3

(10) Error recovery

The IDD can try to recover from errors in SCSI bus 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.

(11) Automatic alternate block reassignment

If a defective data block is detected during read, the IDD can automatically reassign its
alternate data block.

(12) Programmable data block length

Data can be accessed in fixed-block length units. The data block length is programmable, and
can at initializing with a multiple of two for the 512 to 528 bytes.

(13) 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.

(14) High speed positioning

A rotary voice coil motor achieves fast positioning.

(15) Large capacity

A large capacity can be obtained from 3.5-inch 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.

(16) Start/Stop of spindle motor

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

(17) Diagnosis

The IDD has a diagnostic capability which checks internal controller functions and drive
operations to facilitate testing and repair.

C141-E035-03EN1 - 4

(18) 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.

(19) Low noise and low vibration

Approx. 4.2 bels for the IDD. This makes it ideal for office use. The IDD has rubber
vibration isolators, which minimize the transfer of vibration.

(20) 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 to 1.4. The IDD is composed of the disk,
head, spindle motor, hermetically sealed disk enclosure (DE) with actuator and air circulation
filter, as well as read/write pre-amp with the print card unit (PCA) of the controller.

Figure 1.1 MAA31xxSC outer view

C141-E035-02EN 1 - 5

Figure 1.2 MAA31xxSP outer view

Figure 1.3 MAB30xxSC outer view

C141-E035-02EN1 - 6

Figure 1.4 MAB30xxSP outer view

Figure 1.5 MAC30xxSC outer view

Figure 1.6 MAC30xxSP outer view

C141-E035-03EN 1 - 7

(1) Disks

The disks have an outer diameter of 95 mm (3.74 inch) and inner diameter of 25 mm (0.98
inch). The disks are good for at least 10,000 contact starts and stops. Each model contains
following number of disks.

MAA3182:10
MAB3091, MAC3091:5
MAB3045, MAC3045:3

(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 1.7 shows the configuration of disks and heads

MAA3182

0
1

2
3
4
5
6
7

12
13

14
15
16

17
18

Head No.

0
1

2
3
4
5
6
7
8
9

Figure 1.7 Disk/head configuration

MAB3045, MAC3045MAB3091, MAC3091

0
1

2
3

4

(3) 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 speed at
±0.5% of the specified speed.

C141-E035-03EN1 - 8

(4) Actuator

The actuator, which uses a rotary voice coil motor (VCM), consumes little power and
generates little heat. The head assembly at the end of the actuator arm is controlled and
positioned via feedback of servo information in the data.

The actuator positions heads on the CCS zone over the disk and is locked by the mechanical
lock when the power is off or the spindle motor is stopped.

(5) Air circulation (recirculation filter, breather filter)

The heads, disks, and actuator are hermetically sealed inside a disk enclosure (DE) to keep out
dust and other pollutants. 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 dust generated 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.

(6) Read/write circuit

The read/write circuit uses head LSI chips and partial response class 4 maximum likelihood
(PR4ML) modulator and demodulator circuit to prevent errors caused by external noise, thus
improving 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.

C141-E035-03EN 1 - 9

1.3 System Configuration

Figure 1.8 shows the system configuration. The IDDs are connected to the SCSI bus of host
systems and are always operated as target. The IDDs perform input/output operation as
specified by SCSI devices which operate as initiator.

(1) SCSI bus configuration

Up to eight SCSI devices operating as an initiator or a target can be connected to the SCSI bus
for the 8-bit SCSI and up to 16 SCSI devices operating as an initiator or a target can be
connected to the SCSI bus for the 16-bit SCSI in any combination.

For example, the system can be configured as multi-host system on which multiple host
computers that operate as initiator or connected through the SCSI bus.

Using disconnect/reconnect function, concurrent input/output processing is possible on multi­SCSI devices.

Figure 1.8 System configuration

C141-E035-02EN1 - 10

(2) Addressing of peripheral device

Each SCSI device on the bus has its own unique address (SCSI ID:#n in Figure 1.6). For
input/output operation, a peripheral device attached to the SCSI bus that operates as target is
addressed in unit called as logical unit. A unique address (LUN: logical unit number) is
assigned for each logical unit.

The initiator selects one SCSI device by specifying that SCSI ID, then specifies the LUN to
select the peripheral device for input/output operation.

The IDD is constructed so that the whole volume of disk drive is a single logical unit, the
selectable number of SCSI ID and LUN are as follows:

• SCSI ID: 8-bit SCSI:Selectable from 0 to 7 (switch selectable)

16-bit SCSI:Selectable from 0 to 15 (switch selectable)

• LUN: 0 (fixed)

C141-E035-02EN 1 - 11

CHAPTER 2 SPECIFICATIONS

2.1 Hardware Specifications

2.2 SCSI Function Specifications

This chapter describes specifications of the IDD and the functional specifications of the SCSI.

2.1 Hardware Specifications

2.1.1 Model name and part number

Each model has a different data format and front panel type when shipped. (See Appendix D
for the model name (type) and product number.)

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

C141-E035-03EN 2 - 1

2.1.2 Function specifications

Table 2.1 shows the function specifications of the IDD.

Table 2.1 Function specifications

Item

Formatted capacity/device (*1) 18.2 GB 9.1 GB 4.55 GB 9.1 GB 4.55 GB
Unformatted capacity/device 23.9 GB 11.9 GB 5.95 GB 11.8 GB 5.90 GB
Number of disks 10 5 3 5 3
Number of heads 19 10 5 10 5
Number of cylinders (*2) 9,041 8,491 8,691
Unformatted capacity/track 81,920 to

Number of rotations (rpm) 7,200±0.5% 10,033±0.5%
Average latency time 4.17 ms 2.99 ms

Seek time (*3)
(Read/Write)

Start/stop time
(*4)

Recording mode PR4ML
Recording density 121,000 to 159,000 bpi 116,093 to 159,084 bpi
Track density 9,620 TPI 9,200 TPI
External dimensions Height

Weight 1.0 kg 0.65 kg 0.70 kg
Power
consumption (*5)
Interface Fast SCSI Cable length: 6 m max

Data transfer
rate (*8)

Logical data block length (*1) 512 to 528 byte (Fixed length)
SCSI command specification ANSI X3.13-1986 and CCS (Rev. 4B) conformity

Data buffer 512 KB FIFO ring buffer, multi-segment buffer: Segment

Minimum

Average

Maximum

Start time
Stop time

Width
Depth

16bit-SCSI
Single-ended type

Fast 20 SCSI Cable length: 3 m max (*6)

Disk drive 12.3 to

SCSI Asynchronous

mode
Synchronous

mode

MAA3182xx MAB3091xx MAB3045xx MAC3091xx MAC3045xx

126,976

0.9 ms (Read)/

1.1 ms (Write)

8.0 ms (Read)/

9.0 ms (Write)

17.0 ms (Read)/

18.0 ms (Write)

41.3 mm

101.6 mm

146.0 mm

13 W 9 W 14 W

19.5 MB/s

(SCSI-2 ANSI X3T9.2/86-109 Rev 10h) command support
SCSI-3 command partial support

count 1 to 16, Read-ahead cache

85,504 to 126,976 79,872 to 126,976

13.2 to 19.5 MB/s 17.2 to 27.2 MB/s

Specification

0.8 ms (Read)/

1.0 ms (Write)

7.5 ms (Read)/

8.5 ms (Write)

16.0 ms (Read)/

17.0 ms (Write)

30 s typ. (60 s max.)

30 s typ.

25.4 mm

101.6 mm

146.0 mm

Cable length: 1.5 m max (*7)

12 MB/s max.

40 MB/s max.

C141-E035-03EN2 - 2

(*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.

(*2) 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.

(*3) The positioning time is as follows:

100008000600040002000

6

100008000600040002000

MAA31xxxx MAB30xxxx/MAC30xxxx

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

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

(*5) This value indicates at ready mode.

(*6) Up to 4 SCSI devices having capacitance of 25pF or less can use cable length of up to 3.0 m.

(*7) 5 to 8 SCSI devices having capacitance of 25pF or less can use cable length of up to 1.5 m.

(*8) The maximum data transfer rate may be restricted to the response speed of initiator and by

transmission characteristics.

(*9) The terminator power pin (SCSI connector) which supplies power to other terminators is not

used.

C141-E035-03EN 2 - 3

2.1.3 Environmental specifications

Table 2.2 lists environmental and power requirements.

Table 2.2 Environmental/power requirements

MAA3182xx MAB3091xx MAB3045xx MAC3091xx MAC3045xx
Operating 5 to 50°C
Non-operating – 40 to 60°C

Temperature (*1)

Relative humidity

Vibration (*2)

Shock (*2)

Altitute
(above sea level)

Power
requirements
Input power (*5)

DE surface
temperature at
operating

Gradient 15°C/h or less
Operating 20 to 80%RH
Non operating 20 to 80%RH

Maximum wet
bulb temperature

Operating (*3) 0.3 mm (5 to 20Hz)/0.5G (20 to 250 Hz) or less
Non-operating

(*4)
Operating 5G (11 ms half-sin.) or less
Non-operating 50G or less

Operating 0 m to 3,000 m (above sea level)
Non-operating 0 m to 12,000 m (above sea level)
+12 VDC ±5%
Ready (Average)

Spin-up, Seek
Peak within
100 µs at spin-up

+5 VDC ±5% (*6)
Ready

Random W/R
(about 80 IOPS)

Ripple (*7) +5 V 100 mVp-p, +12 V 150 mVp-p

(11 ms half-sin.)

0.77 A

2.5 A (Max)

3.0 A

5 to 55°C

Packaged (inside of a week) 5 to 90%RH

29°C (no condensation)

3.1 mm (5 to 20Hz)/5G (20 to 250Hz) or less

Packaged 3.1 mm (5 to 20Hz)/5G (20 to 250Hz) or less

60G or less (11 ms half-sin)

0.43 A

1.8 A (Max)

3.0 A

0.27 A

1.8 A (Max)

3.0 A

0.75 A

1.1 A

0.85 A

2.5 A (Max)

3.0 A

0.60 A

2.5 A (Max)

3.0 A

(*1) For detail condition, see Section 4.1.

(*2) Vibration applied to the drive is measured at near the mounting screw hole on the frame as

much as possible.

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

(*4) At power-off state after installation

Vibration displacement should be less than 2.5 mm.

(*5) Input voltages are specified at the connector.

C141-E035-03EN2 - 4

(*6) The terminator power pin (SCSI connector) which supplies power to other terminators is not

used (See Section 4.3).

(*7) High frequency noise 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 10
per 1015 bits.

(2) Positioning error rate

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

2.1.5 Reliability

(1) Mean Time Between Failures (MTBF)

MTBF of the IDD during its life time is 1,000,000 hours (operating: 24 hours/day, 7
days/week average DE surface temperature: 40°C or less).

Note:

The MTBF is defined as:

Operating time (hours) at all field sites

MTBF=

The number of equipment failures from all field sites

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) 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.

C141-E035-03EN 2 - 5

(3) 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: 45°C or less 5 years

• DE surface temperature: 46°C to 50°C 4 years

• DE surface temperature: 51°C to 55°C 3 years

• DE surface temperature: 56°C and more strengthen cooling power so that DE

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.

surface temperature is 55°C or less.

(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-E035-03EN2 - 6

2.2 SCSI Function Specifications

Table 2.3 shows the SCSI functions provided with the IDD.

See Appendix E for the SCSI interface functions provided for the IDD. Refer to the OEM
Manual –SCSI Physical Specifications–, for details or specifications.

Table 2.3 SCSI function specifications

Item Specification
Single-ended type
Differential type

Electrical
requirements

Connector

Data bus parity
Bus arbitration function
Disconnection/reconnection function

Addressing

Data transfer

Single-ended type Position where the terminating

Differential type Position where the terminating

TERMPWR signal send/receive function
Non-shielded type (50 mil pitch): 16-bit SCSI
Shielded type

SCSI ID 8-bit SCSI

16-bit SCSI

LUN (logical unit number) #0 fixed
Asynchronous mode 8-bit SCSI

16-bit SCSI
Synchronous mode 8-bit SCSI

16-bit SCSI

Ο

×

Ο

resistor is mounted on the PCA

×

resistor is mounted on the PCA

Ο
Ο

×
Ο
Ο
Ο

#0 to #7

(Jumper selection)

#0 to #15

(Jumper selection)

Ο 6 MB/s max.
Ο 12 MB/s max.

Ο 20 MB/s max.
Ο 40 MB/s max.

Data buffer

Data block length (Logical data length=Physical data length)
Ο : Provided × : Not provided

C141-E035-03EN 2 - 7

512-KB programmable segment

buffer (1 to 16)

512 to 528 bytes

(Fixed length)

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 allow 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 cylinder and several cylinders (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-E035-01EN 3 - 1

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 and 3.2 show the zone layout and the track capacity.

C141-E035-03EN3 - 2

Table 3.1 Zone layout and track capacity (MAA31xxxx)

Zone 0 1 2 3 4 5 6

Cylinder 0 to 769 770 to

1,549

Byte/track 162,250 154,160

Sector/track 248 240

1,550 to

2,279

←
←

2,280 to

2,699

2,700 to

3,499

3,500 to

4,259

4,260 to

5,089

150,833 146,666 141,666 136,666

230 224 216 208

Zone 7 8 9 10 11 12 13

Cylinder 5,090 to

6,099

6,100 to

6,479

6,480 to

7,149

7,150 to

7,669

7,670 to

7,959

7,960 to

8,489

8,490 to

9,039

Byte/track 130,000 127,625 121,900 118,333 115,833 110,416 102,500

Sector/track 200 194 186 180 176 167 160

Table 3.2 Zone layout and track capacity (MAB30xxxx)

Zone 0 1 2 3 4 5 6

Cylinder 0 to 769 770 to

1,549

Byte/track 162,250 154,166

Sector/track 248 240

1,550 to

2,279

←
←

2,280 to

2,699

2,700 to

3,499

3,500 to

4,259

4,260 to

5,089

150,833 146,666 141,666 136,666

230 224 216 208

Zone 7 8 9 10 11 12

Cylinder 5,090 to

6,099

6,100 to

6,479

6,480 to

7,149

7,150 to

7,669

7,670 to

7,959

7,960 to

8,489

Byte/track 130,000 127,625 121,900 118,333 115,833 110,416

Sector/track 200 194 186 180 176 167

Table 3.3 Zone layout and track capacity (MAC30xxxx)

Zone 0 1 2 3 4 5 6

Cylinder 0 to 409 410 to

1,209

Byte/track 162,774 154,698

Sector/track 248 240

1,210 to

1,759

←
←

1,760 to

2,559

2,560 to

3,259

3,260 to

3,909

3,910 to

4,039

151,104 147,484 143,719 141,207

230 225 220 214

Zone 7 8 9 10 11 12 13

Cylinder 4,310 to

4,969

4,970 to

5,509

5,510 to

6,109

6,110 to

6,609

6,610 to

7,469

7,470 to

8,069

8,070 to

8,689

Byte/track 136,738 132,779 128,061 123,873 116,128 110,150 103,154

Sector/track 210 201 195 187 180 166 156

C141-E035-03EN 3 - 3

(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 number of cylinders in the user space is 9,041 for MAA31xxxx, 8,491 for
MAB30xxxx and 8,691 for MAC30xxxx. The user, however, can select the number of
cylinders to be allocated in the user space by specifying 9,041 for MAA31xxxx, 8,491 for
MAB30xxxx and 8,691 for MAC30xxxx as the maximum and the number of alternate
cylinders + 1 as the minimum. 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.

A number starting with 0 is assigned to each cylinder required in the user space in ascending
order. If the number does not reach 9,041 (MAA31xxxx), 8,491 (MAB30xxxx) and 8,691
(MAC30xxxx), the rest of the cylinders will not be used.

Always one alternate cylinders can be established in the user space. 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) 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 only 1 cylinder and outer-host cylinder
is always assigned. The user cannot change the number of cylinders in the Internal test space
or their positions.

The IDD reads or writes the data block in the Internal test space during the self-diagnostic test
specified with a SEND DIAGNOSTIC command.

(3) System space

The system space is an area for exclusive use of the IDD itself and the following information
are recorded. The length of the data block is always 512 bytes.

• Defect list (P list and G list)

• MODE SELECT parameter (saved value)

• Statistical information (log data)

• Controller control information

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

Note:

The system space is also called SA space.

C141-E035-03EN3 - 4

3.1.2 Alternate spare area

The alternate spare area is provided in the last track of each primary cylinder in the user space,
and in the last track of the cylinder and the alternate cylinder.

The spare area in each cylinder 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 cylinder can be specified exceeding 32. The default value of
number of 9space sectors per cylinder is 20.

Figure 3.2 Spare area in cylinders

An alternate cylinder is used when spare sectors in a cylinder are used up or 0 is specified as
the number of spare sectors in a cylinder. Several cylinders at the end of the user space are
allocated as alternate cylinders as shown in Figure 3.3.

The number of alternate cylinder is 1.

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

Figure 3.3 Alternate cylinder

Note:

Zero cannot be specified for both the number of spare sectors in each cylinder and the
number of alternate cylinders.

C141-E035-01EN 3 - 5

3.1.3 Track format

(1) 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
15MHz 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.

Figure 3.4 Track format

C141-E035-03EN3 - 6

(2) Track skew and cylinder 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 cylinder 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 cylinder 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.

Figure 3.5 Track skew/cylinder skew

The number of physical sectors (track skew factor and cylinder skew factor) corresponding to
the skew time varies depending on the logical data block length because the track skew and
the cylinder skew are managed for individual sectors. The IDD automatically determines
appropriate values for the track skew factor and the cylinder 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.

C141-E035-02EN 3 - 7

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.

Each sector on the track consists of the following fields:

Figure 3.6 Sector format

(1) Gaps (G1)

The gap length at the time of formatting (initializing) is listed in Figure 3.6. Pattern X'00' is
written on the gap field.

(2) PLO Sync

In this field, pattern X'00' in the length in bytes listed in Figure 3.6 is written.

(3) Trailing (TRNG)/Sync Byte (SB)

In this field, special pattern in the length in bytes listed in Figure 3.6 is written.

(4) LBA

The logical block address is written in this field.

(5) Data field

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 even number between 512 and 528 bytes can be specified as the length.

C141-E035-02EN3 - 8

(6) BCRC

It is a 2-byte error detection code. Errors in the ID field. Single burst errors with lengths of up
to 16 bits for each logical block can be detected.

(7) ECC

24-byte data error detection/correction code for the data field. It is possible to on-the-fly
correct the single burst errors with lengths of up to 89 bits.

(8) PAD 1

A specified length of x‘00’ pattern shown in Figure 3.6 is written in this field. This field
includes the variation by rotation and circuit delay till reading/writing.

(9) PAD 2/PAD 3

A specified length of x‘00’ pattern shown in Figure 3.6 is written in this field. This field
contains the processing time necessary to process next sector continuously. This field have
rotational speed variation.

C141-E035-02EN 3 - 9

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 3.4 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 (heads) –
number of alternate spare sectors per cylinder] × [number of cylinders in the zone]

[Formatted capacity] = [total of sectors of all zones] – [number of sectors per track in last zone
× number of tracks (heads) × number of alternate cylinders] ÷ [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 3.4 Format capacity

Model Data heads Data block length User blocks Format capacity (GB)
MAA3182xx 19 35,680,750 18.2
MAB3091xx 10 17,824,700 9.1
MAB3045xx 5 512 8,895,370 4.55
MAC3091xx 10 17,871,600 9.1
MAC3045xx 5 8,918,420 4.55

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.

C141-E035-03EN3 - 10

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.

(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) Numbers are assigned in ascending order to all sectors in the same track.

2) By following step 1), numbers are assigned in ascending order of tracks to all sectors in
each track in the same cylinder except the last track.

3) By following step 1), numbers are assigned to all sectors in the last track except the spare
sectors.

4) After completing steps 1) through 3) for the same cylinder, this allocation is repeated from
track 0 in the next cylinder and on to the last cylinder (cylinder p-q in Figure 3.1) except
for the alternate cylinders in ascending order of cylinder numbers.

When the logical data block is allocated, some sectors (track skew and cylinder 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 cylinder 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 cylinder 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.

C141-E035-01EN 3 - 11

3.3 Defect Management

3.3.1 Defect list

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.

• C list (Certification defect list): This list consists of location information on defective
blocks which are detected by the verifying operation (certification) of the data block after
the initiation when executing the FORMAT UNIT command. The IDD generates this
information when executing the FORMAT UNIT command, and the alternate block
allocation is made upon the defective block. This information is recorded in the system
space of the disk drive as the G list.

• 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 cylinder" 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 cylinder as the defective sector's and is effective until all spare sectors in
that cylinder are used up.

C141-E035-01EN3 - 12

• Alternate sector treatment: The logical data block corresponding to defective sectors is
allocated to unused spare sectors in the same cylinder 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–SCSI
Logical 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.

(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 cylinder 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.

C141-E035-01EN 3 - 13

: n represents a logical data block number

: Defective sector

: Unused spare sector

Figure 3.7 Alternate block allocation by FORMAT UNIT command

If the data block verifying operation (certification) is not permitted (DCRT flag = 0) in the
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. If a
defective data block is detected during the check, the IDD generates the C list for defect
location information and allocates the alternate block to the defective data block. This
alternate block allocation is made by means of alternate sector treatment only like processing
by the REASSIGN BLOCKS command even if unused spare sectors exists in the same
cylinder.

C141-E035-01EN3 - 14

(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 cylinder 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
cylinder are used up.

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

: n represents a logical data block number

: Defective sector

: Unused spare sector

Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command

C141-E035-01EN 3 - 15

(3) Automatic alternate block allocation

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 EXTENDED command. This
allocation method is the same as with the REASSIGN BLOCKS command (alternate sector
treatment).

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.

IMPORTANT

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.

C141-E035-01EN3 - 16

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

4.1.1 External dimensions

Figures 4.1 to 4.4 show the external dimensions of the IDD and the positions of the holes for
the IDD mounting screws.

Note:

Dimensions are in mm.

C141-E035-02EN 4 - 1

Figure 4.1 External dimensions (MAA31xxSC)

C141-E035-02EN4 - 2

Figure 4.2 External dimensions (MAA31xxSP)

C141-E035-02EN 4 - 3

Figure 4.3 External dimensions (MAB30xxSC, MAC30xxSC)

C141-E035-03EN4 - 4

Figure 4.4 External dimensions (MAB30xxSP, MAC30xxSP)

C141-E035-03EN 4 - 5

4.1.2 Mounting

The permissible orientations of the IDD are shown in Figure 4.5, and the tolerance of the angle
is ±5° from the horizontal plane.

(a) Horizontal –1 (b) Horizontal –2 (c) Vertical –1

Direction of
gravity

(d) Vertical –2 (e) Upright mounting –1 (f) Upright mounting –2

4.1.3 Notes on mounting

(1) Mounting frame structure

To guarantee integrity of the IDD disk enclosure (DE) insulation once mounted on the frame
inside the system, special attention must be given to the note below.

Note:

Generally, SG and FG are connected at one point in the system enclosure. Therefore, use
following procedure to maintain the insulation when mounting the IDD.

a) Use the frame with an embossed structure or the like to avoid contact between the DE

base and FG. 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 4.6, the inward projection of the screw from the IDD frame wall

at the corner must be 4 mm or less.

Figure 4.5 IDD orientation

C141-E035-02EN4 - 6

c) Tightening torque of screw must be secured with 6kg-cm.

Damage : To absolutely guarantee integrity of the IDD disk enclosure (DE) insulation
once actually mounted to the frame inside the system, special attention must be given
to the cautionary notes below.

Figure 4.6 Mounting frame structure

(2) Limitation of side-mounting

Mount the side using the screw holes at both the ends as shown in Figure 4.7. Do not use the
center hole.

Do not use these holes

Use these holes

Figure 4.7 Limitation of side-mounting

C141-E035-03EN 4 - 7

(3) 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 55°C.

An air flow with an adequate wind velocity must be maintained to
deal with much heat generated from the MAC30xxxx.
Reference value: An air flow with a wind velocity of more than

• 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.

CAUTION

0.5 m/s is required in an environment at 40°C,
and an air flow with a wind velocity of more
than 1.0m/s in an environment at 45°C (Center
of DE cover 55°C).

Table 4.1 Surface temperature check point

No. Measurement point Criteria

1 Center of DE cover 55°C
2 Read channel LSI 83°C
3 VCM/SPM Driver 75°C
4 HDC 85°C

4

1

2

3

Figure 4.8 Surface temperature measurement points (MAA31xxxx/MAB30xxxx/ MAC30xxxx)

C141-E035-03EN4 - 8

(4) Service clearance area

The service clearance area, or the sides which must allow access to the IDD for installation or
maintenance, is shown in Figures 4.9.

[Surface P’]

• Setting terminal

• External operator panel
connector

[Surface R]

• Hole for mounting screw

[Surface P]

• Cable connection

(5) 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.

(6) 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.

(7) Others

A hole or screw portion as shown in Figure 4.10 is used for adjusting air pressure balance
between inside and outside the DE. Do not fill with a seal or label.

[Surface Q]

• Hole for mounting screw

Figure 4.9 Service clearance area

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

C141-E035-02EN 4 - 9

MAA31xxxx

MAB30xxxx

Air pressure adjustment hole

MAC30xxxx

Air pressure adjustment hole

Air pressure adjustment hole

Figure 4.10 Air pressure adjustment hole

C141-E035-03EN4 - 10

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) and (5) below.)

(2) Current waveform (reference)

Figure 4.11 shows the waveform of +12 VDC.

Figure 4.11 Current waveform (+12 VDC)

(3) Power on/off sequence

a) The order of the power on/off sequence of +5 VDC and +12 VDC, supplied to the IDD,

does not matter.

b) In a system which uses the terminating resistor power supply signal (TERMPWR) on the

SCSI bus, the requirements for +5 VDC given in Figure 4.12 must be satisfied between the
IDD and at least one of the SCSI devices supplying power to that signal.

MAB30xxxx current wave formMAA31xxxx, MAC30xxxx current wave form

Figure 4.12 Power on/off sequence (1)

C141-E035-03EN 4 - 11

c) In a system which does not use the terminating resistor power supply signal (TERMPWR)

resistor

on the SCSI bus, the requirements for +5 VDC given in Figure 4.13 must be satisfied
between the IDD and the SCSI device with the terminating resistor circuit.

SCSI devices with
the terminating

Figure 4.13 Power on/off sequence (2)

d) Between the IDD and other SCSI devices on the SCSI bus, the +5 VDC power on/off

sequence is as follows:

• In a system with its all SCSI devices designed to prevent noise from leaking to the

SCSI bus when power is turned on or off, the power sequence does not matter if the
requirement in b) or c) is satisfied.

• In a system containing an SCSI device which is not designed to prevent noise from

SCSI devices
without noise
leaking designed

leaking to the SCSI bus, the requirement given in Figure 4.14 must be satisfied
between that SCSI device and the IDD.

Figure 4.14 Power on/off sequence (3)

C141-E035-02EN4 - 12

(4) 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. For how to set a spindle motor start control mode, see
Subsection 5.3.2.

a) Issue START/STOP commands at 20-second intervals to start the spindle motors. For

details of this command specification, refer to SCSI Logical Interface Specifications.

b) Turn on the +12 VDC power in the power supply unit at 20-second intervals to start the

spindle motors sequentially.

(5) Power supply to SCSI terminating resistor

If power for the terminating resistor is supplied from the IDD to other SCSI devices through
the SCSI bus, the current-carrying capacity of the +5 VDC power supply line to the IDD must
be designed with considering of an increase of up to 200 mA.

A method of power supply to the terminating resistor is selected with a setting terminal on the
IDD. See Subsection 5.3.2 for this selection.

For the electrical condition of supplying power to the terminating resistor, refer to Subsection

1.4.2 in SCSI Physical Interface Specifications.

(6) 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 4.15 is recommended.

Figure 4.15 AC noise filter (recommended)

C141-E035-02EN 4 - 13

4.3 Connection Requirements

4.3.1 Single-ended 16-bit SCSI model (MAA31xxSP, MAB30xxSP, MAC30xxSP)

(1) Connectors

Figures 4.16 show the locations of connectors and terminals on the single-ended 16-bit SCSI
model.

• Power supply connector

• SCSI connector

• External operator panel connector

External operator panel
Spindle sync connector
(CN7)

Power supply
connector
(CN1)

External operator
panel connector
(CN1)

SCSI connector
(CN1)

Figure 4.16 Connectors and terminals location (single-ended 16-bit SCSI)

C141-E035-03EN4 - 14

(2) SCSI connector and power supply connector

The tolerance is ±0.127 mm (0.005 inch) unless otherwise

a. 16-bit SCSI

The connector for the SCSI bus is an unshielded P connector conforming to SCSI-3 type
which has two 34-pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.17 shows the SCSI
connector. See Section C3 in Appendix C for the signal assignments on the SCSI
connector.

For details on the physical/electrical requirements of the interface signals, refer to Sections

1.3 and 1.4 in the SCSI Physical Interface Specifications.

Figure 4.17 16-bit SCSI interface connector

b. Power supply connector

Figure 4.18 shows the shape and the terminal arrangement of the output connector of DC
power supply.

C141-E035-02EN 4 - 15

Figure 4.18 Power supply connector (16-bit SCSI model)

(3) SG terminal

The IDD is not provided with an SG terminal (fasten tab) for DC grounding. Therefore, when
connecting SG and FG in the system, use the +5 VDC RETURN (ground) inside the power
supply connector as the SG on the power supply side.

(4) Connector for external operator panel

• Connector for 16-bit SCSI external operator panel

CN1 provides connector for the external operator panel other than the SCSI bus as shown
in Figure 4.19. Also, a connector for the external operator panel are provided on the IDD
as shown in Figure 4.20. This allows connection of an external LED on the front panel,
and an SCSI ID setting switch. For the recommended circuit of the external operator
panel, see Subsection 4.3.5.

Pin Signal

A1 –ID0
A2 (Reserved)
A3 –ID1
A4 (Open)
A5 –ID2
A6 –SYNC
A7 –ID3
A8 –LED

A9 TERMON
A10 GND
A11 +5 V
A12 (Reserved)

Figure 4.19 External operator panel connector (CN1)

C141-E035-02EN4 - 16

Figure 4.20 External operator panel connector (CN7)

C141-E035-02EN 4 - 17

(5) External operator panel connector Signals

a. 16-bit SCSI –ID3, –ID2, –ID1, –ID0: Input signals

These signals are used for providing switches to set the SCSI ID of the IDD externally.
Figure 4.21 shows the electrical requirements. For the recommended circuit examples, see
Subsection 4.3.5.

Figure 4.21 16-bit SCSI ID external input

C141-E035-02EN4 - 18

b. –LED and LED (V): Output signals

These signals actuate the external LED as same as LED on the front panel of the disk
drive. The electrical requirements are given in Figure 4.22.

Notes:

1. The external LED is identical in indication to the LED on the front of the IDD.
The meaning of indication can be selected with the CHANGE DEFINITION
command. For details of command, refer to SCSI Logical Interface
Specifications.

2. Any load other than the external LED (see Subsection 4.3.5) should not be
connected to the LED (V) and –LED terminals.

Figure 4.22 Output signal for external LED

c. -SYNC (-Spindle sync): Input/output signal

The pin CN1-A6, or CN7-10 inputs or outputs the signal for rotational synchronization
when the IDD carries out rotational synchronization.

1) Outputs the master signal for rotational synchronization when the IDD is the master
of rotational synchronization.

C141-E035-02EN 4 - 19

2) Inputs the master signal when the IDD carries out rotational synchronization with the
external master signal.
This signal is pulled up with 3 kΩ resistor internally, it is necessary to connect the
external terminating resistor.

For details of spindle synchronization function , refer to Section 3.1, in the SCSI
Logical Interface Specifications.

CAUTION

Make the CN1-A6 pin or CN7-10 pin open when not having the
IDD carry out spindle synchronization.

d. –DISCON (–disable terminator connection)/TERMON (terminator on): Input signal

The CN1-A9 (TERMON) or CN6-06 (–DISCON) pin setting specifies whether to operate
the terminating resistor built-in to the IDD. Table 4.2 shows the electrical requirements.

See Subsection 5.4.4 for the requirements for terminating resistor operation.

Table 4.2 External inputs for operating terminating resistor (16-bit single-ended type)

Input level Function

0 to 0.4 VDC The terminating resistor operates.

(Open) The terminating resistor does not operate.

Note:

When the external operator panel is connected to the CN1-A9 pin and the operation of
the terminating resistor is set on the external operator panel, the corresponding CN6-06
pin must always be set to open.

See Subsection 5.3.3.

C141-E035-02EN4 - 20

(6) Cable connection requirements

The requirements for cable connection between the IDD, host system, and power supply unit
are given in Figure 4.23. Recommended components for connection are listed in Table 4.1.

External operator panel

(example)

Figure 4.23 Cables connection (16-bit SCSI model)

C141-E035-02EN 4 - 21

4.3.2 SCA2 type SCSI model (MAA31xxSC, MAB30xxSC, MAC30xxSC)

(1) Connectors

Figure 4.24 shows the locations of connectors and terminals on the SCA2 type SCSI model.
SCSI connector (including power supply connector)

SCSI connector

Figure 4.24 Connectors and terminals location of SCA2 type SCSI model

C141-E035-03EN4 - 22

(2) SCSI connector and power supply connector

a. SCA type SCSI

The connector for the SCSI bus is an unshielded SCA-2 connector conforming to SCSI-3
type which has two 40-pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.25 shows the
SCSI connector. See Section C.5 in Appendix C for signal assignments on the connector.

For details on the physical/electrical requirements of the interface signals, refer to Sections

1.3 and 1.4 in SCSI Physical Interface Specifications.

Figure 4.25 SCA2 type SCSI connector

C141-E035-03EN 4 - 23

ESD contact

4.3.3 Cable connector requirements

Table 4.3 lists the recommended components cable connection.

Table 4.3 Recommended components for connection

Applicable

model

MAx3xxxSP SCSI cable (CN1) Cable socket

Power supply cable
(CN1)

External operator
panel (CN1)

External operator
panel (CN7)

MAx3xxxSC SCSI connector

(CN1)

Name Par number Manufacturer Reference

(closed-end type)
Signal cable — —
Cable socket

housing
Contact 60619-4
Cable 60617-4
Cable socket

housing
Contact FCN-723J-G/AM Fujitsu Limited
Cable AWG26 to 34
Cable socket

housing
Contact FCN-723J-G/AM Fujitsu Limited
Cable AWG28
Connector 787311-1 AMP

(1) SCSI cable

All SCSI devices on one bus are daisy-chained with an SCSI cable. A terminating resistor
must be mounted in the SCSI device at each end of the SCSI cable.

(Figures 4.23

and 4.28)

786090-7 AMP S1

1-480424-0 AMP S2

FCN-723J012/2M Fujitsu Limited S3

FCN-723J016/2M Fujitsu Limited S4

Because an SCSI terminating resistor module has been mounted in the IDD of single-ended
type SCSI at factory shipment, it must be set to not-connection when the IDD is not connected
at either end of the SCSI cable. See Section 5.3 for details.

The maximum number of SCSI devices that can be connected to the SCSI bus is 16 for the 16­bit SCSI, including the host adapter, IDD, and other SCSI equipment.

For the 16-bit SCSI, the connector for the SCSI cable must be an unshielded 68-contact socket
having 34-contact rows spaced 1.27 mm (0.05 inch) apart. (See Figure 4.26.)

C141-E035-02EN4 - 24

<SCSI cable connector for 16-bit SCSI>

16-bit SCSI

Symbol

mm inch
C1 2.540 0.110
C2 41.910 1.650
C3 1.270 0.050
C4 46.280 1.822
C5 5.690 2.240
C6 42.540 1.675

Note:

The tolerance is ±0.127 mm (0.005 inch) unless otherwise specified.

Figure 4.26 SCSI cable connector

Remarks

C141-E035-02EN 4 - 25

The maximum length of the SCSI cable is as follow. If more than one SCSI device is
connected, the total cable length must not exceed the value given in Table 4.2. The cable
length between single-ended type SCSI devices must be more than 30 cm (recommended: 50
cm or more). Each system should decide the cable length between SCSI devices so that the
total cable length of the system satisfies the specification.

Table 4.4 Total cable length of SCSI cable

Type

Fast SCSI Ultra SCSI

Single-ended Up to 3 m

[Up to 6 m is allowable for

5 MB/s or less]

For the SCSI cables, the use of 25- and 34-pair twisted pair cables satisfying the requirements
in Table 4.5 is recommended.

Table 4.5 SCSI cable requirements

Requirements 16-bit SCSI (34-pair)

Conductor size 30 AWG or bigger

Characteristic impedance

Twist pair cable condition Pins n and n + 33

To maintain the transmission characteristics and reduce signal reflection, cables having
different a characteristic impedance must not be used on the same SCSI bus.

16-bit SCSI

Up to 3.0 m

[4 SCSI devices having

capacitance of 25 pF]

Up to 1.5 m

[5 to 8 SCSI devices

having capacitance of 25 pF]

90 to 132 Ω

When an SCSI device is connected to the SCSI cable at a point other than either end of the
cable, connection to the SCSI connector must be at a branch point of the cable. If an SCSI
device is connected to last SCSI device except when the cable has a terminating resistor. (See
Figure 4.27.)

C141-E035-02EN4 - 26

(2) Power cable

IDDs must be star-connected to the DC power supply (one to one connection) to reduce the
influence of load variations.

(3) DC ground

The DC ground cable must always be connected to the IDD because no fasten terminal
dedicated to SG is provided with the IDD. Therefore, when SG and FG are connected in the
system, it is necessary to connect SG and FG at the power supply or to connect SG of the
power supply to FG of the system.

(4) External operator panel

The external operator panel is installed only when required for the system. When connection
is not required, leave open the following pins in the external operator panel connector of the
IDD : Pins 15, 16 and 01 pins 10 through 08 in CN7 and pins A1 through A12 in CN1.

Figure 4.27 SCSI cable termination

C141-E035-02EN 4 - 27

4.3.4 External operator panel

A recommended circuit of the external operator panel is shown in Figure 4.28. Since the
external operator panel is not provided as an option, this panel must be fabricated at the user
site referring to the recommendation if necessary.

Figure 4.28 External operator panel circuit example (MAx3xxxSP)

Note:

Do not connect the external LED to both CN1 and CN7. Connect it to either of them.

C141-E035-03EN4 - 28

CHAPTER 5 INSTALLATION

5.1 Notes on Handling Drives

5.2 Connections

5.3 Setting Terminals

5.4 Mounting Drives

5.5 Connecting Cables

5.6 Confirming Operations after Installation and Preparation
for Use

5.7 Dismounting Drives

This chapter describes the notes on handling drives, connections, setting switches and plugs, mounting
drives, connecting cables, confirming drive operations after installation and preparation for use, and
dismounting drives.

5.1 Notes on Handling Drives

(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.

(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.

C141-E035-01EN 5 - 1

(3) Installation

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

settings that may be altered are pins 13, 14 (Write Protect) in CN7.

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.

(4) Packaging

a) Store the drive in an antistatic vinyl bag with a desiccant (silica gel).

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 4.2.2 (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.

C141-E035-02EN5 - 2

5.2 Connections

Figure 5.1 shows examples of connection modes between the host system and the IDD. For
the 16-bit SCSI, up to 16 devices including the host adapter, IDD, and other SCSI devices can
be connected to the SCSI bus in arbitrary combinations. Install a terminating resistor on the
SCSI device connected to both ends of the SCSI cable.

See Section 4.4 for the cable connection requirements and power cable connections.

(1) Connecting one IDD

(2) Connecting more than one IDD (single host)

Figure 5.1 SCSI bus connections (1 of 2)

C141-E035-02EN 5 - 3

(3) Connecting more than one IDD (multi-host)

Figure 5.1 SCSI bus connections (2 of 2)

C141-E035-01EN5 - 4

5.3 Setting Terminals

The user must set the following terminals and SCSI terminating resistor before installing the
IDD in the system.

• Setting terminal: CN6, CN7

Figures 5.2 shows the setting terminal position of SP model. Figures 5.3 shows SP models for
allocation and default settings.

1. The user must not change the setting of terminals not described in this
section. Do not change setting status set at factory shipment.

2. Do not change the setting of terminals except following setting pins
during the power is turned on.

• Write protect

CAUTION

MAx3xxxSP: CN7 13-14

CN1

3. To short the setting terminal, use the short plug attached when the
device is shipped from the factory.

CN6

1

6

15/16

CN7

1/2

Figure 5.2 MAx3xxxSP setting terminals position

C141-E035-02EN 5 - 5

Figure 5.3 Setting terminals (MAx3xxxSP)

C141-E035-02EN5 - 6

5.3.1 SCSI ID setting

(1) SCA type 16-bit SCSI model (MAx3xxxSC)

There is no SCSI ID setting terminal for SCA type model. Set the SCSI ID using ID0, ID1,
ID2, and ID3 signals on the SCSI interface connector (CN1).

(2) Single-ended 16-bit SCSI model (MAx3xxxSP)

Table 5.1 shows the SCSI ID setting. Refer to Figures 5.2 and 5.3 for connector positioning
and allocation.

IMPORTANT

When the SCSI ID is set using the external operator panel
connector CN1, all pins listed in Table 5.1 should be open. If any
of pins are shorted, unexpected SCSI ID is set.

Table 5.1 SCSI ID setting (single-ended 16-bit SCSI model: MAx3xxxSP)

SCSI ID MAx3xxxSP (CN7)

5-6 3-4 1-2 5-6
0 Open Open Open Open
1 Open Open Open Short
2 Open Open Short Open
3 Open Open Short Short
4 Open Short Open Open
5 Open Short Open Short
6 Open Short Short Open
7 Open Short Short Short
8 Short Open Open Open
9 Short Open Open Short

10 Short Open Short Open
11 Short Open Short Short
12 Short Short Open Open
13 Short Short Open Short
14 Short Short Short Open

15 (*1) Short Short Short Short

*1 Set at factory shipment

C141-E035-02EN 5 - 7

IMPORTANT

1. Set the SCSI ID so that there are no duplicates between SCSI devices
on the same SCSI bus.

2. The priority of SCSI bus use in ARBITRATION phase is determined by
SCSI ID as follows:
7 > 6 > 5 > 4 > 3 > 2 > 1 > 0 > 15 > 14 > 13 > 12 > 11 > 10 > 9 > 8

5.3.2 Each mode setting

(1) Setting terminal power supply

Refer to Table 5.2 for controlling the supply of power from the drive to the SCSI terminal
resistance power source (TERMPOW). However, this setting may not be used with SCA2
type 16 bit-SCSI (MAx3xxxSC). For information on MAx3xxxSP, refer to Figures 5.2 and

5.3.

Table 5.2 Setting SCSI terminal power supply (single-ended 16-bit SCSI model: MAx3xxxSP)

Supply on/off of SCSI terminating resistor power from IDD CN6 1-2

Supply off Open

Supply on Short (*1)

*1 Setting at factory shipment

(2) Motor start mode

Set how to control the starting of the IDD spindle motor according to Table 5.3. This setting
only determines the operation mode when the power supply is turned on or the microcode is
downloaded. In both modes, stopping or restarting the spindle motor can be controlled by
specifying the START/STOP UNIT command.

This setting is not provided for SCA2 type 16-bit SCSI model (MAx3xxxSC).

For information on MAx3xxxSP, refer to Figures 5.2 and 5.3.

Table 5.3 Motor start mode setting (single-ended 16-bit SCSI model: MAx3xxxSP)

Start timing of the spindle motor CN6 3-4
Starting of the motor is controlled with the START/STOP UNIT command. Open
The motor is started immediately after the power supply is turned on or the

microcode is downloaded.

*1 Setting at factory shipment

Short (*1)

Refer to Chapter 3 of the SCSI Logical Interface Specifications for details of the
START/STOP UNIT command.

C141-E035-02EN5 - 8

5.3.3 Write protect, terminating resistor setting

(1) Write protect

When the write protect function is enabled, writing to the disk medium is disabled. The write
protect function setting is not provided to the SCA2 type 16-bit SCSI model (MAx3xxxSC).

For information on MAx3xxxSP, refer to Figure 5.2 and 5.3.

Table 5.4 Write protect setting (single-ended 16-bit SCSI model: MAx3xxxSP)

Write protect MAx3xxxSP

Write operation is enabled. Open (*1)
Write operation is disable. Short

*1 Setting at factory shipment

(2) Connection of terminating resistor on SCSI interface

a. SCA2 type 16-bit SCSI model (MAx3xxxSC)

CN7 13-14

Since there is no SCSI terminating resistor on the SCSI interface for SCA2 type 16-bit
SCSI, there is no setting on the IDD.

b. Single-ended 16-bit SCSI model (MAx3xxxSP)

Setting terminals CN6 5-6 set whether to use the terminating resistor circuit on the SCSI
interface provided for the IDD (see Table 5.5).

IMPORTANT

When the external operator panel is connected using the external
operator panel connector CN1, this setting is effective only when
the A9 pin (TERM-ON) is open.

Table 5.5 Setting of connection of terminating resistor on SCSI interface

(single-ended 16-bit SCSI model: MAx3xxxSP)

Connecting SCSI interface terminating resistor MAx3xxxSP

CN6 5-6
Terminating resistor circuit is not connected. Open
Terminating resistor circuit is connected. Short *

* Set at factory shipment

C141-E035-02EN 5 - 9

5.3.4 Mode settings

In addition to the previously described settings using setting terminals, the IDD is provided
with several mode settings. The mode settings are enabled by specifying the CHANGE
DEFINITION command. Table 5.6 lists the mode settings and their settings at factory
shipment.

Refer to Section 3.1.4 of the SCSI Logical Interface Specifications for details of the command.

Table 5.6 Default mode settings (by CHANGE DEFINITION command)

Mode setting Contents
SCSI level SCSI-2
SYNCHRONOUS DATA TRANSFER REQUEST message

sending
UNIT ATTENTION report mode Reported
Reselection retry count Not restricted
WIDE DATA TRANSFER REQUEST message sending Sent from IDD
Reselection time-out delay 250 ms

Spindle motor start delay time

Sent from IDD

0 sec (MAx3xxxSP)

12 sec × SCSI ID

(MAx3xxxSC)

C141-E035-02EN5 - 10

5.4 Mounting Drives

5.4.1 Check before mounting

Reconfirm if the setting terminals are set correctly before mounting the drive in the system
cabinet. For setting terminals location, see Section 5.3.

(1) Single-ended 16-bit SCSI model (MAx3xxxSP)

Reconfirm if the setting terminals are set correctly according to Table 5.7.

Table 5.7 Setting check list (MAx3xxxSP)

Setting

terminal

CN6

Setting

terminal

CN7

5.4.2 Mounting procedures

No.

1 Terminal power supply CN6 1 - 2 Short Open
2 Motor start mode CN6 3 - 4 Short Open
3 Connection of terminating

No.

1 SCSI ID CN7 7 - 8

2 Write protect CN7 13 - 14 Short Open

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.

Setting contents

(Check item)

resistor on SCSI interface

Setting contents

(Check item)

Setting

position

CN6 5 - 6 Short Open

Setting

position

5 - 6
3 - 4
1 - 2

Check Remarks

Check Remarks

(SCSI ID = __)

See Subsection 4.2 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.

C141-E035-01EN 5 - 11

• Use mounting screws whose lengths inside the drive mounting frame are 4 mm or less

when the screws are tightened (see Figure 4.6).

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

3) Check that the DE (signal ground) does not touch the system cabinet chassis (frame
ground). There must be a 2.5 mm or more space between the DE and chassis (see Figure

4.6).

5.5 Connecting Cables

Connect the IDD and system with the following cables. See Section 4.4 for further details of
the requirements for IDD connector positions and connecting cables.

• Power cable

• SCSI cable

• External operator panel cable (if required)

• Spindle sync cable

The general procedures and notes on connecting cables are described below. Especially, pay
attention to the inserting direction of each cable connector.

CAUTION

1. Check that system power is off before connecting or disconnecting
cables.

2. Do not connect or disconnect cables when power is on.

a) Connect power cable.

b) Connect the external operator panel (if required for system).

c) Connect the SCSI cable.

d) Fix the cables so that they do not touch the DE and PCAs, or so that the smooth flow of

the cooling air in the system cabinet is assured.

C141-E035-02EN5 - 12

CAUTION

1. Be careful of the insertion directions of the SCSI connectors. With the
system in which terminating resistor power is supplied via the SCSI
cable, if the power is turned on, the overcurrent protection fuse of the
terminating resistor power supplier may be blown or the cable may be
burnt if overcurrent protection is not provided.

When the recommended parts listed in Table 4.1 are used, inserting
the cables in the wrong direction can be prevented.

2. To connect SCSI devices, be careful of the connection position of the
cable. Check that the SCSI device with the terminating resistor is the
last device connected to the cable.

5.6 Confirming Operations after Installation and Preparation for use

5.6.1 Confirming initial operations

This section describes the operation check procedures after power is turned on. Since the
initial operation of the IDD depends on the setting of the motor start mode, check the initial
operation by either of the following procedures.

(1) Initial operation in the case of setting so that motor starts at powering-on

a) When power is turned on, the LED blinks an instant and the IDD executes initial self-

diagnosis.

b) If an error is detected in the initial self-diagnosis, the LED on the front panel blinks

periodically.

Remark:

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

c) When the IDD status is idle, the LED on the front panel remains off (when the initiator

accesses the IDD via the SCSI bus, the LED lights).

(2) Initial operation in the case of setting so that motor starts with START/STOP command

a) When power is turned on, the LED blinks an instant and the IDD executes initial self-

diagnosis.

b) If an error is detected in the initial self-diagnosis, the LED on the front panel blinks.

C141-E035-02EN 5 - 13

c) The spindle motor does not start rotating until the START/STOP UNIT command for the

start is issued. The INIT needs to issue the START/STOP UNIT command to start the
spindle motor by the procedure in Subsection 5.6.2.

d) The disk drive enters the READY status in 30 seconds after the START/STOP UNIT

command is issued. At this time, the IDD reads "system information" from the system
space on the disk.

e) The LED blinks during command execution.

(3) Check items at illegal operation

a) Check that cables are mounted correctly.

b) Check that power and voltages are supplied correctly (measure them with the IDD power

connection position).

c) Check the setting of each setting terminal. Note that the initial operation depends on the

setting of the motor start mode and LED display requirements.

d) If an error is detected in initial self-diagnosis the LED on the front panel blinks. In this

case, it is recommended to issue the REQUEST SENSE command from the initiator (host
system) to obtain information (sense data) for error analysis.

IMPORTANT

The LED lights during the IDD is executing a command.
However, in same commands, the lighting time is only an instant.
Therefore, it seems that the LED blinks or the LED remains off.

C141-E035-02EN5 - 14

5.6.2 Checking SCSI connection

When the initial operation is checked normally after power is turned on, check that the IDD is
connected to the SCSI bus 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 5.4
shows the recommended checking procedure for the mode that the motor starts when power is
turned on. Figure 5.5 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 5.4 and 5.5.

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

correctly to the SCSI bus 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 SCSI bus operations with the WRITE BUFFER and READ BUFFER

commands. Use data whose data bus bits change to 0 or 1 at least once. (Example:
Data with an increment pattern of X'00' to X'FF')

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

the basic operations of the controller and disk drive.

C141-E035-02EN 5 - 15

Motor starts when power is turned on

Figure 5.4 Checking the SCSI connection (A)

C141-E035-02EN5 - 16

Motor starts by START/STOP command

Figure 5.5 Checking the SCSI connection (B)

C141-E035-02EN 5 - 17

(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 4 of SCSI Logical
Interface Specifications for further details.

b) Check the following items for the SCSI cable connection:

• All connectors including other SCSI devices are connected correctly.

• The terminating resistor is mounted on both ends of the cable.

• Power is connected to the terminating resistor.

c) Check the setting of the terminals. Note that the checking procedure of SCSI connection

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

5.6.3 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 5 of SCSI Logical
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).

C141-E035-02EN5 - 18

b. Format parameter (page code = 3)

Specify the number of spare sectors for each cylinder 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.

c. Drive parameter (page code = 4)

To explicitly specify the number of cylinders in the user space, specify the number in the
"number of cylinders" field. Note that the number of alternate cylinders specified by the
format parameter (page code = 3) is included in the number of cylinders in the user space.
When the number of cylinders need not be specified, specify 0 or the default value in the
"number of cylinders" field. In this case, either of the smaller value between the number
of cylinders to allocate the number of logical data blocks specified in the "number of data
blocks" field of the block descriptor or the maximum number of cylinders that can be used
as the user space on the disk drive is allocated in the user space. When 0 is specified both
in the "number of cylinders" field and the "number of data blocks" field of the block
descriptor, the maximum number of cylinders that can be used as the user space on the
disk drive is allocated in the user space.

(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-E035-02EN 5 - 19

5.6.4 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 SCSI Logical
Interface Specifications for further details of the MODE SELECT and MODE SELECT
EXTENDED commands and specifying the parameters.

IMPORTANT

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 SCSI 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.

C141-E035-02EN5 - 20

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.

(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)

• ARRE:

• TB:

• EER:

• PER:

• DCR:

• Retry count at read operation

• Retry count at write operation

• Recovery time limit

Automatic alternate block allocation at read
operation
Uncorrectable data transfer to the INIT
Immediate correction of correctable error
Report of recovered error
Suppression of ECC error correction

Parameter Default value

1 (enabled)

1 (enabled)
1 (enabled)

0 (disabled)

0 (Correction is

enabled.)

63

0

30 sec

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

Parameter Default value

• ERR:

• PER:

• DTE:

• DCR:

• Retry count at verification 63

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

• Retry count at seek error 15

Immediate correction of recoverable error
Report of recovered error
Stop of command processing at successful
error recovery
Suppression of ECC error correction

Parameter Default value

1 (enabled)

0 (disabled)

0 (Processing is

continued.)

0 (Correction is

enabled.)

C141-E035-02EN 5 - 21