Fujitsu MAM3184MC-MP, MAM3367MC-MP User Manual
MAM3367MC/MP SERIES
MAM3184MC/MP SERIES
DISK DRIVES
PRODUCT/MAINTENANCE MANUAL
C141-E134-01EN
FOR SAFE OPERATION
Handling of This manual
This manual conta ins important information for using this p roduct. 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 damage
to their property. Use the product according to this manual.
IMPORTANT NOTE TO USERS
READ THE ENTIRE MANUAL CARE FULLY BEFORE USING THIS PRODUCT.
INCORRECT USE OF THE PRODUCT MAY RESULT IN INJURY OR DAMAGE
TO USERS, BYSTANDERS OR PROPERTY.
While FUJITSU has sought to ensure the accuracy of all information in this manual, FUJITSU assumes no
liability to any party for any damage caused by any error or omission contained in this manual, its updates
or supplements, whether such errors or omissions result from negligence, accident, or any other cause. In
addition, FUJITSU assumes no liability with respect to the application or use of any porduct or system in
accordance with the descriptions or instructions contained herein; including any liability for incidental or
consequential damages arising there from.
FUJTSU DISCLAIMS ALL WARRANTIES REGARDING THE INFORMATION CONTAINED
HEREIN, WHETHER EXPRESSED, IMPLIED, OR STATUTORY.
FUJITSU reserves the right to make changes to any products described herein without further notice and
without obligation.
This product is designed and manufactured for use in standard applications such as office work, personal
devices and household appliances. This product is not intended for special uses (atomic controls,
aeronautic or space systems, mass transport vehicle operating controls, medical devices for life support, or
weapons firing controls) where particularly high reliability requirements exist, where the pertinent levels of
safety are not guaranteed, or where a failure or operational error could threaten a life or cause a physical
injury (hereafter referred to as "mission-critical" use). Customers considering the use of these products for
mission-critical applications must have safety-assurance measures in place beforehand. Moreover, they are
requested to consult our sales representative before embarking on such specialized use.
The contents of this manual may be revised without prior notice.
The contents of this manual shall not be disclosed in any way or reproduced in any media without the
express written permission of Fujitsu Limited.
All Right Reserved, Copyright © FUJITSU LIMITED 2001
C141-E134-01EN
REVISION RECORD
Edition Dat e p ublis hed Revised contents
01 July., 2001
Specification No.: C141-E134-01EN
C141-E134-01EN i
Related Standards
Specifications and functions of products covered by this manual comply with the following
standards.
Standard (Text) No. Name Enacting Organization
ANSI X3.131-1994 Small Computer System Interface -
2(SCSI-2)
T10/1236-D Rev 19 SCSI Primary Commands-2 (SPC-2) American National
ANSI NCITS. 306-1998 SCSI-3 Block Commands (SBC) American National
ANSI X3.270-1996 SCSI-3 Architecture Model (SAM) American National
ANSI NCITS. 336-2000 SCSI Parallel Interface-3 (SPI-3) American National
American National
Standards Institute
(ANSI)
Standards Institute
(ANSI)
Standards Institute
(ANSI)
Standards Institute
(ANSI)
Standards Institute
(ANSI)
ii C141-E134-01EN
PREFACE
This manual describes the MAM3367MC/MP, MAM3184MC/MP (hereafter, MAM series), 3.5 type 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 MAM series disk drives and discusses their standard features, hardware, and
system configuration.
Chapter 2 SPECIFICATIONS
This chapter gives detailed specifications of the MAM 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 MAM series disk drives.
Chapter 5 INSTALLATION
This chapter explains how to install MAM series disk drives. It includes the notice and procedures for
setting device number and op erat ion modes, mounting the d isk dr ive, c onnec ting the c abl es, and co nfirming
drive operation.
Chapter 6 DIAGNOSIS and MAINTENANCE
This chapter describes the automatic diagnosis, and maintenance of MAM series disk drive. This chapter
also describes diagnostic methods for operation check and the basics of troubleshooting the disk drives.
Chapter 7 ERROR ANALYSIS
This chapter describes in details how collect the information for error analysis and how analyze collected
error information.
Chapter 8 PRINCIPLE OF OPERATION
This chapter explains disk drives configuration and operation of MAM series.
C141-E134-01EN iii
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.
CONVENTIONS
This manual uses the following conventions for alerts to prevent physical or proper ty 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
iv C141-E134-01EN
This manual indicates;
Decimal number: Indicates as it is.
Hexadecimal number: Indicates as X’17B9’, 17B9h, or 17B9H
Binary number: Indicates as “010”
DISCLAIMER
Failure of the MAM 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 device type 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:
Note 2:
Model names
M AM 3 367 MC
Interface types MC: LVD, 16-bit SCSI SCA2 connector 160MHz transfer
MP: LVD, 16-bit SCSI 68 pin connector 160MHz transfer
Formatted capacity (100 MB units)
Disk drive size 3: 3.5 type. Hard Disk Drive
Type AM: Number of rotations 15,000min
Type model name
Type model name Model name
MAM3367 MAM3367MC, MAM3367MP
MAM3184 MAM3184MC, MAM3184MP
-1
(15,000rpm)
C141-E134-01EN v
Important Alert Items
Important Alert Messages
The important alert messages in this manual are as follows:
A hazardous situation could result in minor or moderate personal injury if the
user does not perform the procedure correctly. This alert signal also indicates
that damages to the product or other property may occur if the user does not
perform the procedure correctly.
Task Alert message Page
Mounting Installation
Data loss
For MAM series, Reed Solomon codes are applied for their ECC.
The sector-data is divided into 6 interleaving sectors, and ECC is
performed in each sector where the maximum number of errors (up
to 5 byte) can be corrected. [Total maximum byte: 5 byte
interleave) = 30 byte]
If the error of read sector keeps allowable error byte number,
correction is performed.
However, if error byte exceeds its allowable number, correction
may not be performed properly.
Hot temperature
To prevent injury, do not handle the drive until after the device has
cooled sufficiently after turning off the power. The DE and LSI
become hot during operation and remain hot immediately after
turning off the power.
Data loss
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: CN2 9-10 (MP model only)
3. To short the setting terminal, use the short plug attached when
the device is shipped from the factory.
Damage
1. Make sure that system power is off before connecting or
disconnecting cables.
2. Do not connect or disconnect cables when power is on.(except
MC model)
Damage
1. Be careful of the insertion orientation of the SCSI connectors.
With the system in which terminating resistor power is sup plied
via the SCSI cable, if the power is turned on, the overcurrent
×
6 (
2-5
5-1
5-5
5-11
5-11
vi C141-E134-01EN
Task Alert message Page
Mounting Installation
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 4.2 are used,
inserting the cables in the wrong direction can be prevented.
2. To connect SCSI devices, be careful o f th e connection position
of the cable. Check that the SCSI device with the terminating
resistor is the last device connected to the cable.
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.
Caution
1. To avoid shocks, turn off the power before connecting or
disconnecting a cable, connector, or plug.
2. To avoid injury, do not touch the mechanical assembly during
disk drive operation.
3. Do not use solvents to clean the disk drive.
Caution
1. Always ground yourself with a wrist strap connected to ground
before handling. ESD (Electrostatics Discharge) may cause
the damage to the device.
2. To prevent electrical damage to the disk drive, turn the power
off before connecting or disconnecting a cable, connector, or
plug.
3. Do not remove a PCA. This operation is required to prevent
unexpected or unpredictable operation.
4. Do not use a conductive cleaner to clean a disk drive assembly.
5. Ribbon cables are marked with a colored line. Connect the
ribbon cable to a cable connector with the colored wire
connected to pin 1.
Damage
Never open the disk enclosure in the field. Opening the disk
enclosure in the field may cause an irreparable fault.
Data loss
Save data stored on the disk drive before requesting repair. Fujitsu
does not assume responsibility if data is destroyed during servicing
or repair.
6-4
6-5
6-6
6-6
6-15
6-7
C141-E134-01EN vii
MANUAL ORGANIZATION
PRODUCT/
MAINTENANCE
MANUAL
(This manual)
SCSI Physical
Interface
Specifications
SCSI Logical
Interface
Specifications
1. General Description
2. Specifications
3. Data Format
4. Installation Requirements
5. Installation
6. Diagnostics and Maintenance
7. Error Analysis
8. Principle of Operation
1. SCSI Bus
2. SCSI Message
3. SCSI Bus Error Recovery Processing
1. Command Processing
2. Data Bu ffer Management
3. Command Specification
4. Sense Data and error Recovery Procedure
5. Disk Medium Ma nagement
viii C141-E134-01EN
CONTENTS
page
CHAPTER 1 GENERAL DESCRIPTION ........................................................................................1-1
1.1 Standard Features ..........................................................................................................................1-2
1.2 Hardware Structure........................................................................................................................1-5
1.3 System Configuration....................................................................................................................1-8
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.......................................................................................................................3-4
3.1.3 Track format..................................................................................................................................3-5
3.1.4 Sector format.................................................................................................................................3-7
3.1.5 Format capacity.............................................................................................................................3-9
3.2 Logical Data Block Addressing...................................................................................................3-10
3.3 Defect Management.....................................................................................................................3-11
3.3.1 Defect list.....................................................................................................................................3-11
3.3.2 Alternate block allocation............................................................................................................3-11
CHAPTER 4 INSTALLATION REQUIREMENTS.........................................................................4-1
4.1 Mounting Requirements.................................................................................................................4-1
4.1.1 External dimensions.......................................................................................................................4-1
4.1.2 Mounting .......................................................................................................................................4-4
4.1.3 Notes on mounting.........................................................................................................................4-4
4.2 Power Supply Requirements..........................................................................................................4-8
4.3 Connection Requirements..................................................................................................... .......4-11
4.3.1 68 pin connector 16-bit SCSI model (MP model) .......................................................................4-11
C141-E134-01EN ix
4.3.2 SCA2 type SCSI model (MC model)...........................................................................................4-19
4.3.3 Cable connector requirements......................................................................................................4-20
4.3.4 External operator panel (MP model) ...........................................................................................4-22
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 (MP model only)..................................................................................................5-6
5.3.2 Each mode setting (MP model only)..............................................................................................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
5.8 Spare Disk Drive .........................................................................................................................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 Precautions ....................................................................................................................................6-5
6.2.2 Maintenance requirements.............................................................................................................6-6
6.2.3 Maintenance levels........................................................................................................................6-8
6.2.4 Revision numbers .......................................................................................................... ................6-9
6.2.5 Tools and test equipment.............................................................................................................6-10
6.2.6 Tests.............................................................................................................................................6-10
6.3 Operation Check..........................................................................................................................6-12
6.3.1 Initial seek operation check.........................................................................................................6-12
6.3.2 Operation test...............................................................................................................................6-12
x C141-E134-01EN
6.3.3 Diagnostic test .............................................................................................................................6-12
6.4 Troubleshooting Procedures........................................................................................................6-13
6.4.1 Outline of troubleshooting procedures.........................................................................................6-13
6.4.2 Troubleshooting with disk drive replacement in the field............................................................6-13
6.4.3 Troubleshooting at the repair site................................................................................................6-15
6.4.4 Troubleshooting with parts replacement in the factory................................................................6-16
6.4.5 Finding possibly faulty parts........................................................................................................6-16
CHAPTER 7 ERROR ANALYSIS .....................................................................................................7-1
7.1 Error Analysis Information Collection...........................................................................................7-1
7.1.1 Sense data......................................................................................................................................7-1
7.1.2 Sense key, sense code, and subsense code.....................................................................................7-1
7.2 Sense Data Analysis.......................................................................................................................7-3
7.2.1 Error information indicated with sense data ..................................................................................7-3
7.2.2 Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)...........................................................7-4
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error..................................................7-4
7.2.4 Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00), (B-4D-xx)
and (B-4E-00): SCSI interface error.............................................................................................7-4
CHAPTER 8 PRINCIPLE OF OPERATION...................................................................................8-1
8.1 Outline ...........................................................................................................................................8-1
8.2 Disk Drive Configuration ..............................................................................................................8-1
8.2.1 Disks..............................................................................................................................................8-2
8.2.2 Heads.............................................................................................................................................8-2
8.2.3 Spindle mechanism........................................................................................................................8-2
8.2.4 Actuator.........................................................................................................................................8-2
8.2.5 Air filters........................................................................................................................................8-2
8.3 Circuit Configuration.....................................................................................................................8-3
8.4 Power-On Sequence.......................................................................................................................8-5
8.5 Factory-Calibration........................................................................................................................8-6
8.6 Read/Write Circuit.........................................................................................................................8-7
8.6.1 Head IC..........................................................................................................................................8-7
8.6.2 Write circuit............................................................................................................. ......................8-7
8.6.3 Read circuit....................................................................................................................................8-9
8.7 Servo Control.................................................................................................................................8-9
8.7.1 Servo control circuit......................................................................................................................8-9
8.7.2 Servo format................................................................................................................................8-10
C141-E134-01EN xi
8.7.3 Servo frame format......................................................................................................................8-12
8.7.4 Spindle motor control..................................................................................................................8-12
8.7.5 Voice coil motor control..............................................................................................................8-13
APPENDIX A LOCATIONS OF CONNECTORS AND SETTING TERMINALS........................A-1
A.1 Locations of Connector (MC model)............................................................................................A-2
A.2 Locations of Connectors and Setting Terminals (MP model)....................................................... A-3
APPENDIX B SETTING TERMINALS.............................................................................................B-1
B.1 Setting Terminals (MP model)......................................................................................................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
xii C141-E134-01EN
FIGURES
page
Figure
1.1 MC model outer view...........................................................................................................1-5
Figure 1.2 MP model outer view...........................................................................................................1-6
Figure 1.3 Disk/head configuration.......................................................................................................1-7
Figure 1.4 System configuration............................................................................................................1-8
Figure 3.1 Cylinder configuration .........................................................................................................3-2
Figure 3.2 Spare area in cell..................................................................................................................3-5
Figure 3.3 Alternate cylinder.................................................................................................................3-5
Figure 3.4 Track format.........................................................................................................................3-6
Figure 3.5 Track skew/cylinder skew....................................................................................................3-7
Figure 3.6 Sector format........................................................................................................................3-8
Figure 3.7 Alternate block allocation by FORMAT UNIT command.................................................3-13
Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command........................................3-14
Figure 4.1 External dimensions (MC model) ........................................................................................4-2
Figure 4.2 External dimensions (MP model) .........................................................................................4-3
Figure 4.3 IDD orientations...................................................................................................................4-4
Figure 4.4 Mounting frame structure.....................................................................................................4-5
Figure 4.5 Limitation of side-mounting.................................................................................................4-5
Figure 4.6 Surface temperature measurement points.............................................................................4-6
Figure 4.7 Service clearance area..........................................................................................................4-7
Figure 4.8 Current waveform (+12 VDC).............................................................................................4-8
Figure 4.9 Power on/off sequence (1)....................................................................................................4-9
Figure 4.10 Power on/off sequence (2)....................................................................................................4-9
Figure 4.11 Power on/off sequence (3)....................................................................................................4-9
Figure 4.12 AC noise filter (recommended)..........................................................................................4-10
Figure 4.13 Connectors and terminals location (MP model).................................................................4-11
Figure 4.14 16-bit SCSI interface connector.........................................................................................4-12
Figure 4.15 Power supply connector (16-bit SCSI model)....................................................................4-12
Figure 4.16 External operator panel connector (CN1)..........................................................................4-13
Figure 4.17 External operator panel connector (CN2)..........................................................................4-14
Figure 4.18 16-bit SCSI ID external input.............................................................................................4-15
Figure 4.19 Output signal for external LED..........................................................................................4-17
Figure 4.20 SCSI cables connection......................................................................................................4-18
C141-E134-01EN xiii
Figure 4.21 Connectors location of MC model .....................................................................................4-19
Figure 4.22 SCA2 type SCSI connector ............................................................................................ ....4-20
Figure 4.23 External operator panel circuit example.............................................................................4-22
Figure 5.1 SCSI bus connections (1 of 2)..............................................................................................5-4
Figure 5.1 SCSI bus connections (2 of 2)..............................................................................................5-4
Figure 5.2 IDD setting terminals position (MP model only).................................................................5-5
Figure 5.3 Setting terminator (CN2 on MP model only).......................................................................5-6
Figure 5.4 Checking the SCSI connection (A) ....................................................................................5-14
Figure 5.5 Checking the SCSI connection (B).....................................................................................5-15
Figure 6.1 Revision label.......................................................................................................................6-9
Figure 6.2 Indicating revision numbers...............................................................................................6-10
Figure 6.3 Test flowchart ....................................................................................................................6-11
Figure 7.1 Format of extended sense data .............................................................................................7-2
Figure 8.1 Circuit configuration............................................................................................................8-4
Figure 8.2 IDD operation sequence at power-on...................................................................................8-5
Figure 8.3 Block diagram of read-write circuit .....................................................................................8-8
Figure 8.4 Block diagram of servo control circuit...............................................................................8-10
Figure 8.5 Position of servo track........................................................................................................8-12
Figure 8.6 Servo frame........................................................................................................................8-12
Figure A.1 Locations of connector (MC model)...................................................................................A-2
Figure A.2 Locations of connectors and setting terminals (MP model)................................................ A-3
xiv C141-E134-01EN
TABLES
page
Table 2.1 Function specifications.........................................................................................................2-2
Table 2.2 Environmental/power requirements .....................................................................................2-4
Table 2.3 SCSI function specifications................................................................................................2-7
Table 3.1 Zone layout and track capacity.............................................................................................3-3
Table 3.4 Format capacity..................................................................................................................3-10
Table 4.1 Surface temperature check point..........................................................................................4-6
Table 4.2 Recommended components for connection........................................................................4-21
Table 5.1 SCSI ID setting (CN2 on MP model only)...........................................................................5-7
Table 5.2 Setting SCSI terminal power supply (MP model only)........................................................5-7
Table 5.3 Motor start mode setting (MP model only)..........................................................................5-8
Table 5.4 Write protect setting (MP model only).................................................................................5-8
Table 5.5 Setting of the SCSI interface operation mode (MP model only)..........................................5-9
Table 5.6 Setting the bus width of the SCSI interface (MP model only)..............................................5-9
Table 5.7 Default mode settings (by CHANGE DEFINITION command)..........................................5-9
Table 5.8 Setting check list (MP model only)....................................................................................5-10
Table 6.1 Self-diagnostic functions......................................................................................................6-1
Table 6.2 System-level field troubleshooting.....................................................................................6-14
Table 6.3 Disk drive troubleshooting............................................................................................ .....6-15
Table 7.1 Definition of sense data........................................................................................................7-3
Table B.1 Setting terminal: CN2 (MP model).................................................................................... B-2
Table C.1 SCSI connector (SCA2 type LVD 16-bit SCSI): CN1....................................................... C-2
Table C.2 SCSI connector (68 pin type LVD 16-bit SCSI): CN1 ......................................................C-3
Table D.1 MAN series model names and product numbers.................................................................D-2
C141-E134-01EN xv
This page is intentionally left blank.
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 type 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 X3.131-1994: 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. Refer to SCSI
Logical Interface Specifications for details.
C141-E134-01EN 1 - 1
1.1 Standard Features
(1) Compactness
Since the SCSI controller circuit is embedded in the standard 3.5 type 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 standard
The IDD provides not only SCSI basic functions but also the following features:
• Arbitration
• Disconnection/Reconnection
• Data bus parity
The SCSI commands can manipulate data through logical block addressing regardless of the
physical characteristics of the disk drive. This allows software to accommodate future expansion
of system functions.
(3) 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 only MP model.
For the ultra SCSI model, number of connectable SCSI devices on the same SCSI bus is varied as
follows.
• 8-bit SCSI: 8 drives max.
• 16-bit SCSI: 16 drives max.
(4) High speed data transfer
Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in the
IDD.
• 8-bit SCSI : The data transfer rate on the SCSI bus is 40 MB/s maximum in
synchronous mode.
• 16-bit SCSI: T he data transfer rate on the SCSI bus is 160 MB/s maximum in
synchronous mode.
C141-E134-01EN1 - 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 buffe r is 8M bytes. Data is transfe rred between SCSI bus and d isk media through this
data buffer. This feature provides the suitable usage environment for users.
Since the initiator can control the disconnect/reconnect timing on the 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 th e subs equent com m and requests the pref etched 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.
(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.
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(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 or write 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
be specified at initializing with a multiple of four 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 type disk drives by dividing all cylinders into several
partitions and changing the recording density on each partition (constant density recording). The
disk subsystem with large capacity can be constructed in the good space efficiency.
(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.
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(18) Low power consumption
By using highly integrated LSI components, the po wer consumption of the ID D is very low, a nd
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. 3.9 bels. This makes it ideal for office use.
(20) Microcode downloading
The IDD implements the microcode download feature. This feature achieves easy maintainability
of the IDD and function enhancing.
1.2 Hardw are Structure
An outer view of the IDD is given in Figures 1.1 to 1.2. The IDD is composed of the disk, head,
spindle motor, mounted disk enclosure (DE) with actuator and air circulation filter, as well as
read/write pre-amp with the print card unit (PCA) of the controller.
Figure 1.1 MC model outer view
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(1) Disks
The disks have an outer diameter of 70 mm (2.8 inch) outer diameter and 25 mm (0.98 inch) inner
diameter for MAM series. The disks are good for at least 20,000 contact starts and stops. Each
model contains fo llowing number of disks.
Figure 1.2 MP model outer view
MAM3367: 4
MAM3184: 2
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(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
1.3 shows the configuration of disks and heads
(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 specified speed.
(4) Actuator
The actuator, which uses a rotary voice coil motor (VCM), consumes little power and generates
little heat. The heads at the end of the actuator arm is controlled and p ositioned via feedback of
servo information in the data.
MAM3367
0
1
2
3
4
5
6
7
Figure 1.3 Disk/head configuration
MAM3184
0
1
2
3
The heads are positioned on the CCS zone over the disk when the power is off or the spindle motor
is stopped.
(5) Air circulation (recirculation filter, breather filter)
The disk enclosure (DE) configures a sealed room 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. T his 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 MEEPR4ML (Modified Enhanced Extended Partial Response Class 4
C141-E134-01EN 1 - 7
Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered
by external noise and to improve data reliability.
(7) Controller circuit
The controller circuit uses LSIs to increase the reliability and uses a high speed microprocessing
unit (MPU) to increase the performance of the SCSI controller.
1.3 System Configuration
Figure 1.4 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.
SCSI bus
Figure 1.4 System configuration
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(1) SCSI bus co nfi guration
Up to eight SCSI devices operating as an initiator or a target can be connected to the SCSI b us 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 multi-SCSI
devices.
(2) Addressing of peripheral device
Each SCSI device on the bus has its own unique address (SCSI ID:#n in Figure 1.4). 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:Selectab le fro m 0 to 7 ( switch selectable)
16-bit SCSI:Selectable from 0 to 15 (switch selectable)
• LUN: 0 (fixed)
C141-E134-01EN 1 - 9
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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 Hardw are Specifications
2.1.1 Model name and part number
Each model has a different recording capacities and interface connector 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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2.1.2 Function specifications
Table 2.1 shows the function specifications of the IDD.
Table 2.1 Function specifications
Item
MAM3367 series MAM3184 series
Specification
Formatted capacity/device (*1) 36.74 GB 18.37 GB
Number of disks 4 2
Number of heads 8 4
Number of cylinders (*2) 18,754 18,786
Formatted capacity/track (B) 200, 704-265, 216
Number of rotations min-1 (rpm) 15,000
Average latency time 2.00 msec
0.4 ms/0.6 ms
3.5 ms/4.0 ms
8.0 ms/9.0 ms
30 s typ. (60 s max.)
30 s typ.
Seek time (*3)
(Read/Write)
Start/stop time
(*4)
Track to Track
Average
Full stroke
Start time
Stop time
Recording mode 32/34 MEEPRML
External
dimensions
Height:
Width:
Depth:
25.4 mm
101.6 mm
146.0 mm
Weight (max) 0.8 kg
Power consumption (*5) 11.5 W 9.5 W
Fast 5 SCSI Cable length: 6 m max
SingleEnded
Interface
LVD
Data
transfer
rate (*10)
Fast 10 SCSI Cable length: 3 m max
Fast 20 SCSI
Cable length: 3 m max (*6)
Cable length: 1.5 m max (*7)
Cable length: 25 m max (*8)
Cable length: 12 m max (*9)
Disk drive
Synchronous
SCSI
mode
68.6 to 88.0 MB/s
160 MB/s max.
Logical data block length (*11) 512 to 528 byte (Fixed length)
ANSI X3.131-1994 conformity
SCSI command specification
SPC-2 (T10/1236-D Rev 19), SBC (ANSI NCITS.306-1998), SAM
(ANSI × 3.270-1996), SPI-3 (ANSI NCITS. 336-2000)
Data buffer 8 MB FIFO ring buffer
Acostic noise (Ready) 3.9 bels
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