Fujitsu MAE3182LC, MAE3091LC, MAF3364LP, MAF3364LC, MAG3182LC User Manual
MAF3364LC/LP/MC/MP SERIES
MAE3182LC/LP, MAE3091LC/LP
SERIES
MAG3182LC/LP/MC/MP,
MAG3091LC/LP/MC/MP SERIES
DISK DRIVES
PRODUCT MANUAL
C141-E064-03EN
REVISION RECORD
Edition Date published Revised contents
01 Nov., 1998
02 May, 1999
03 Oct., 1999 MC/MP types are added.
Specification No.: C141-E064-**EN
The contents of this manual is subject to
change without prior notice.
All Rights Reserved.
Copyright 1999 FUJITSU LIMITED
C141-E064-03EN i
This page is intentionally left blank.
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-E064-03EN 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 © 1998, 1999 Fujitsu Limited
iv C141-E064-03EN
PREFACE
This manual describes the MAF3364LC/LP/MC/MP (hereafter, MAF series), MAE3182LC/LP,
MAE3091LC/LP, (hereafter, MAE series), and MAG3182LC/LP/MC/MP, MAG3091LC/LP/MC/MP
(hereafter, MAG 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 MAF series, MAE series and MAG series disk drives and discusses their
standard features, hardware, and system configuration.
Chapter 2 SPECIFICATIONS
This chapter gives detailed specifications of the MAF series, MAE series and MAG 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 MAF series, MAE
series and MAG series disk drives.
Chapter 5 INSTALLATION
This chapter explains how to install MAF series, MAE series and MAG 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 MAF series, MAE series and
MAG series disk drive.
APPENDIX A to D
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-E064-03EN 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-E064-03EN
DISCLAIMER
Failure of the MAF series, MAE series and MAG 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 AF 3 364 LC
Interface types LC: LVD, 16-bit SCSI SCA2 connector
LP: LVD, 16-bit SCSI 68 pin connector
MC: LVD, 16-bit SCSI SCA2 connector 160MHz
transfer
MP: LVD, 16-bit SCSI 68 pin connector 160MHz
transfer
Note 2: Type model name
Type model name Model name
MAE3182 MAE3182LC, MAE3182LP
MAE3091 MAE3091LC, MAE3091LP
MAF3364 MAF3364LC, MAF3364LP, MAF3364MC, MAF3364MP
MAG3182 MAG3182LC, MAG3182LP, MAG3182MC, MAG3182MP
MAG3091 MAG3091LC, MAG3091LP, MAG3091MC, MAG3091MP
Formatted capacity (100 MB units)
Disk size 3: 3.5 inch
Type AE: 1-inch height (7,200rpm)
AF: 1.6-inch height (10,025rpm)
AG: 1-inch height (10,025rpm)
C141-E064-03EN vii
Important Alert Items
Important Alert Messages
The important alert messages in this manual are as follows:
A hazarous situation could result in minor or moderate personal injury if
the user does not perform the procedure correctly. This alert signal also
indicates that damages to the produt or other property, may occur if the
user does not perform the procedure correctly.
Task Alert message Page
Mounting Installation Heat
An air flow with an adequate wind velocity must be maintained
to deal with much heat generated from the MAF3364xx.
Reference value: An air flow with a wind velocity of more than
Data loss
1. The user must not change the setting of terminals not
2. Do not change the setting of terminals except following
3. To short the setting terminal, use the short plug attached
Damage
1. Check that system power is off before connecting or
2. Do not connect or disconnect cables when power is on.
Data loss
When the SEND DIAGNOSTIC command terminates with the
CHECK CONDITION status, the INIT must collect the error
information using the REQUEST SENSE command. The
RECEIVE DIAGNOSTIC RESULTS command cannot read out
the error information detected in the self-diagnostics.
Damage
Do not open the DE in the field because it is completely sealed.
Data loss
Save data stored on the disk drive before requesting repair.
Fujitsu does not assume responsibility if data is destroyed
during servicing or repair.
4-10
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).
5-5
described in this section. Do not change setting status set at
factory shipment.
setting pins during the power is turned on.
• Write protect: CN2 9-10
when the device is shipped from the factory.
5-11
disconnecting cables.
6-4
6-5
6-6
viii C141-E064-03EN
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 Diagnostics
3. Error Analysis
4. Removal and Replacement Procedures
5. Principle of Operation
C141-E064-03EN ix
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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........................................................................................................................ 4-8
4.1.3 Notes on mounting......................................................................................................... 4-8
4.2 Power Supply Requirements ..........................................................................................4-13
C141-E064-03EN xi
4.3 Connection Requirements ..............................................................................................4-16
4.3.1 68 pin connector 16-bit model (LP/MP).........................................................................4-16
4.3.2 SCA2 type SCSI model (LC/MC).................................................................................. 4-24
4.3.3 Cable connector requirements ........................................................................................4-28
4.3.4 External operator panel...................................................................................................4-29
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................................................................ ...............................................5-6
5.3.2 Each mode setting ..........................................................................................................5-7
5.3.3 Mode settings .................................................................................................................5-9
5.4 Mounting Drives ............................................................................................................5-10
5.4.1 Check before mounting ..................................................................................................5-10
5.4.2 Mounting procedures...................................................................................................... 5-10
5.5 Connecting Cables.......................................................................................................... 5-11
5.6 Confirming Operations after Installation and Preparation for use ..................................5-12
5.6.1 Confirming initial operations.......................................................................................... 5-12
5.6.2 Checking SCSI connection............................................................................................. 5-13
5.6.3 Formatting...................................................................................................................... 5-16
5.6.4 Setting parameters ..........................................................................................................5-18
5.7 Dismounting Drives .......................................................................................................5-22
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 AND SETTING TERMINALS .......... A-1
A.1 Locations of Connectors and Setting Terminals
(LC/MC models: SCA2 type LVD 16-bit SCSI)........................................................... A-2
xii C141-E064-03EN
A.2 Locations of Connectors and Setting Terminals
(LP/MP models: 68 pin type LVD 16-bit SCSI)............................................................ A-3
APPENDIX B SETTING TERMINALS................................................................................ B-1
B.1 Setting Terminals............................................................................................................ B-2
APPENDIX C CONNECTOR SIGNAL ALLOCATION .................................................... C-1
C.1 SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI................................ C-2
C.2 SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI ...............................C-3
APPENDIX D MODEL NAMES AND PRODUCT NUMBERS ......................................... D-1
D.1 Model Names and Product Numbers..............................................................................D-2
Index................................................................................................................................ ............ IN-1
C141-E064-03EN xiii
FIGURES
page
1.1 MAF series LC/MC outer view...................................................................................... 1-5
1.2 MAF series LP/MP outer view.......................................................................................1-6
1.3 MAE series LC outer view ............................................................................................. 1-6
1.4 MAE series LP outer view..............................................................................................1-7
1.5 MAG series LC/MC outer view...................................................................................... 1-7
1.6 MAG series LP/MP 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 (MAF series LC/MC).................................................................... 4-2
4.2 External dimensions (MAF series LP/MP)..................................................................... 4-3
4.3 External dimensions (MAE series LC)........................................................................... 4-4
4.4 External dimensions (MAE series LP)............................................................................ 4-5
4.5 External dimensions (MAG series LC/MC) ...................................................................4-6
4.6 External dimensions (MAG series LP/MP) ................................................................ .... 4-7
4.7 IDD directions................................................................................................................ 4-8
4.8 Mounting frame structure............................................................................................... 4-9
4.9 Limitation of side-mounting........................................................................................... 4-9
4.10 Surface temperature measurement points (MAF series, MAE series, MAG series)........4-10
4.11 Service clearance area..................................................................................................... 4-11
4.12 Air pressure adjustment hole.......................................................................................... 4-12
4.13 Current waveform (+12 VDC)........................................................................................ 4-13
4.14 Power on/off sequence (1).............................................................................................. 4-14
4.15 Power on/off sequence (2).............................................................................................. 4-14
4.16 Power on/off sequence (3).............................................................................................. 4-14
xiv C141-E064-03EN
4.17 AC noise filter (recommended)...................................................................................... 4-15
4.18 Connectors and terminals location (LP/MP)...................................................................4-16
4.19 16-bit SCSI interface connector...................................................................................... 4-17
4.20 Power supply connector (16-bit SCSI model)................................................................ 4-17
4.21 External operator panel connector (CN1)....................................................................... 4-18
4.22 External operator panel connector (CN2)....................................................................... 4-19
4.23 16-bit SCSI ID external input......................................................................................... 4-20
4.24 Output signal for external LED ................................................................ ...................... 4-21
4.25 SCSI cables connection..................................................................................................4-23
4.26 Connectors and terminals location of SCA2 type SCSI model.......................................4-24
4.27 SCA2 type SCSI connector............................................................................................ 4-25
4.28 External operator panel connector (CN2)....................................................................... 4-26
4.29 16-bit SCSI ID external input......................................................................................... 4-27
4.30 External operator panel circuit example (LP/MP) .......................................................... 4-29
5.1 SCSI bus connections..................................................................................................... 5-3
5.2 IDD setting terminals position................................................................ ........................ 5-5
5.3 Setting terminals (CN2).................................................................................................. 5-6
5.4 Checking the SCSI connection (A)................................................................................. 5-14
5.5 Checking the SCSI connection (B)................................................................................. 5-15
6.1 Revision label................................................................................................................. 6-7
6.2 Indicating revision numbers ........................................................................................... 6-8
A.1 Locations of connectors and setting terminals
(LC/MC models: SCA2 type LVD 16-bit SCSI)............................................................... A-2
A.2 Locations of connectors and setting terminals
(LP/MP models: 68 pin type LVD 16-bit SCSI)................................................................ A-3
C141-E064-03EN xv
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 (MAE series)................................................................. 3-3
3.2 Zone layout and track capacity (MAG series) ................................................................3-3
3.3 Zone layout and track capacity (MAF series)................................................................. 3-3
3.4 Format capacity.............................................................................................................. 3-10
4.1 Surface temperature check point..................................................................................... 4-10
4.2 Recommended components for connection.................................................................... 4-28
5.1 SCSI ID setting (CN2)................................................................ ....................................5-7
5.2 Setting SCSI terminal power supply (LP/MP)................................................................ 5-7
5.3 Motor start mode setting................................................................................................. 5-8
5.4 Write protect setting (CN2) ............................................................................................ 5-8
5.5 Setting of the SCSI interface operation mode (CN2)...................................................... 5-9
5.6 Setting of the bus width of the SCSI interface (CN2).....................................................5-9
5.7 Default mode settings (by CHANGE DEFINITION command)..................................... 5-9
5.8 Setting check list ............................................................................................................5-10
6.1 Self-diagnostic functions................................................................................................ 6-1
B.1 Setting terminal: CN2.................................................................................................... B-2
C.1 SCSI connector (SCA2 type LVD 16-bit SCSI): CN1................................................... C-2
C.2 SCSI connector (68 pin type LVD 16-bit SCSI): CN1.................................................. C-3
D.1 MAE, MAF and MAG series model names and product numbers ................................. D-2
xvi C141-E064-03EN
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-E064-03EN 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 bus width (16-bit SCSI), which have the wide transfer function
suitable for SCSI-2. This is also available as 8-bit data bus.
• 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 SCSI bus is 40 MB/s maximum in
synchronous mode.
• 16-bit SCSI: The data transfer rate on the SCSI bus is 80 MB/s maximum in
synchronous mode for LC/LP models and 160 MB/s maximum in
synchronous mode for MC/MP models.
Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in
the IDD.
C141-E064-03EN1 - 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 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) Programmable multi-segment data buffer
The data buffer is 2M bytes for LC/LP and 4M bytes for MC/MP. Data is transferred between
SCSI bus and disk media through this data buffer. The data buffer is divided into 1 to 32
segments.
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-E064-03EN 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 LC/LP and four for MC/MP within the range of
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-E028-01EN1 - 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
The noise level is low; approx. 4.2 bels for MAF series and 4.0 bels for MAE and MAG
series. 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 1.6. 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 MAF series LC/MC outer view
C141-E064-03EN 1 - 5
Figure 1.2 MAF series LP/MP outer view
Figure 1.3 MAE series LC outer view
C141-E064-03EN1 - 6
Figure 1.4 MAE series LP outer view
Figure 1.5 MAG series LC/MC outer view
Figure 1.6 MAG series LP/MP outer view
C141-E064-03EN 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) for MAE series, and 84 mm (3.3 inch) outer diameter and 25 mm (0.98 inch) inner
diameter for MAF/MAG series. The disks are good for at least 15,000 contact starts and stops.
Each model contains following number of disks.
MAF3364: 10
MAE3182: 4
MAE3091: 2
MAG3182: 5
MAG3091: 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
MAF3364
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
MAE3091
0
1
2
3
Figure 1.7 Disk/head configuration
MAG3091MAG3182
0
1
2
3
4
MAE3182
0
1
2
3
4
5
6
7
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(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.
(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 utilizes a read channel mounted with a head IC that supports high-speed
transmission and an EPR4ML (Extended Partial Response Class 4 Maximum Likelihood)
modulation/demodulation circuit in order to prevent errors being triggered by external noise
and to improve data reliability.
(7) Controller circuit
The controller circuit uses LSIs to increase the reliability and uses a high speed
microprocessing unit (MPU) to increase the performance of the SCSI controller.
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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
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(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)
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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.
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