Fujitsu MAH3182MC Maintenance Manual
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Fujitsu MAH3182MC Maintenance Manual

Fujitsu MAH3182MC Maintenance Manual

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MAH3182MC/MP SERIES
MAH3091MC/MP SERIES
MAJ3364MC/MP SERIES
MAJ3182MC/MP SERIES
MAJ3091MC/MP SERIES
PRODUCT/MAINTENANCE MANUAL
DISK DRIVES
C141-E103-01EN

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  • Page 1 MAH3182MC/MP SERIES MAH3091MC/MP SERIES MAJ3364MC/MP SERIES MAJ3182MC/MP SERIES MAJ3091MC/MP SERIES DISK DRIVES PRODUCT/MAINTENANCE MANUAL C141-E103-01EN...
  • Page 2 REVISION RECORD Edition Date published Revised contents Feb., 2000 Specification No.: C141-E103-**EN The contents of this manual is subject to change without prior notice. All Rights Reserved. Copyright © 2000 FUJITSU LIMITED C141-E103-01EN...
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  • Page 4 “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.
  • Page 5 X3T10/994D Rev 18 WORKING DRAFT Information American National technology SCSI-3 Architecture Model Standards Institute (SAM) (ANSI) T10/1302D Rev 11 WORKING DRAFT Information American National technology SCSI Parallel Interface-3 Standards Institute (SPI-3) (ANSI) All Right Reserved, Copyright © 2000 Fujitsu Limited C141-E103-01EN...
  • Page 6 PREFACE This manual describes the MAH3182MC/MP, MAH3091MC/MP (hereafter, MAH series) and MAJ3364MC/MP, MAJ3182MC/MP, MAJ3091MC/MP (hereafter, MAJ 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.
  • Page 7 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.
  • Page 8 Failure of the MAH series and MAJ 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.
  • Page 9 Alert Items Important 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.
  • Page 10 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. 6-15 Caution Never open the disk enclosure in the field.
  • Page 11 MANUAL ORGANIZATION PRODUCT/ 1. General Description MAINTENANCE 2. Specifications MANUAL 3. Data Format 4. Installation Requirements (This manual) 5. Installation 6. Diagnostics and Maintenance 7. Error Analysis 8. Principle of Operation SCSI Physical 1. SCSI Bus Interface 2. SCSI Message Specifications 3.

  • Page 12: Table Of Contents

    CONTENTS page CHAPTER 1 GENERAL DESCRIPTION.................1-1 Standard Features ........................1-2 Hardware Structure........................1-5 System Configuration ......................1-9 CHAPTER 2 SPECIFICATIONS....................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 SCSI Function Specifications ....................2-7 CHAPTER 3 DATA FORMAT....................3-1...
  • Page 13 4.3.1 68 pin connector 16-bit SCSI model (MP model) ..............4-14 4.3.2 SCA2 type SCSI model (MC model) ..................4-22 4.3.3 Cable connector requirements ....................4-26 4.3.4 External operator panel ......................4-27 CHAPTER 5 INSTALLATION ....................5-1 Notes on Handling Drives .....................5-1 Connections ...........................5-3 Setting Terminals........................5-5 5.3.1 SCSI ID setting........................5-6 5.3.2...
  • Page 14 6.3.2 Operation test ........................6-12 6.3.3 Diagnostic test ........................6-12 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...
  • Page 15 8.7.2 Servo format ..........................8-11 8.7.3 Servo frame format........................8-13 8.7.4 Spindle motor control ......................8-13 8.7.5 Voice coil motor control......................8-13 APPENDIX A LOCATIONS OF CONNECTORS AND SETTING TERMINALS .....A-1 Locations of Connectors and Setting Terminals (MAH series MC model) ......A-2 Locations of Connectors and Setting Terminals (MAH series MP model)......A-3 Locations of Connectors and Setting Terminals (MAJ series MC model) ......A-4 Locations of Connectors and Setting Terminals (MAJ series MP model)......A-5 APPENDIX B...
  • Page 16 FIGURES page MAH series MC outer view....................1-5 MAH series MP outer view ....................1-6 MAJ series MC outer view ....................1-6 MAJ series MP outer view ....................1-6 Disk/head configuration ......................1-7 System configuration ......................1-9 Cylinder configuration......................3-2 Spare area in cylinders......................3-5 Alternate cylinder ........................3-6 Track format ..........................3-6 Track skew/cylinder skew .....................3-7 Sector format .........................3-8...
  • Page 17 4.20 External operator panel connector (CN2)................4-17 4.21 16-bit SCSI ID external input....................4-18 4.22 Output signal for external LED .....................4-20 4.23 SCSI cables connection ......................4-21 4.24 Connectors and terminals location of MC model ..............4-22 4.25 SCA2 type SCSI connector ....................4-23 4.26 External operator panel connector (CN2)................4-24 4.27 16-bit SCSI ID external input....................4-25...
  • Page 18 TABLES page Function specifications ......................2-2 Environmental/power requirements..................2-4 SCSI function specifications....................2-7 Zone layout and track capacity (MAJ3364 series/MAJ3182 series) ........3-3 Zone layout and track capacity (MAJ3091 series) ..............3-3 Zone layout and track capacity (MAH series) ...............3-4 Format capacity ........................3-10 Surface temperature check point ...................4-8 Recommended components for connection ................4-26 SCSI ID setting (CN2)......................5-7 Setting SCSI terminal power supply (MP) ................5-7...
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  • Page 20: Chapter 1 General Description

    CHAPTER 1 GENERAL DESCRIPTION Standard Features Hardware Structure 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 - 1986: Small Computer System Interface (SCSI), ANSI X3.131-1994: Small Computer System Interface - 2 (SCSI-2)].

  • Page 21: Standard Features

    Standard Features 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. SCSI/CCS standard The IDD provides not only SCSI basic functions but also the following features: •...
  • Page 22 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.
  • Page 23 (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.

  • Page 24: Hardware Structure

    (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. 4.0 bels for MAH and MAJ series. This makes it ideal for office use.

  • Page 25: Mah Series Mp Outer View

    Figure 1.2 MAH series MP outer view Figure 1.3 MAJ series MC outer view Figure 1.4 MAJ series MP outer view 1 - 6 C141-E103-01EN...

  • Page 26: Disk/Head Configuration

    Disks The disks have an outer diameter of 95 mm (3.74 inch) and inner diameter of 25 mm (0.98 inch) for MAH series, and 84 mm (3.3 inch) outer diameter and 25 mm (0.98 inch) inner diameter for MAJ series. The disks are good for at least 15,000 contact starts and stops. Each model contains following number of disks.
  • Page 27 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. 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.

  • Page 28: System Configuration

    System Configuration Figure 1.6 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 1.6 System configuration SCSI bus configuration...
  • Page 29 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.

  • Page 30: Chapter 2 Specifications

    CHAPTER 2 SPECIFICATIONS Hardware Specifications SCSI Function Specifications This chapter describes specifications of the IDD and the functional specifications of the SCSI. 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.

  • Page 31: Function Specifications

    2.1.2 Function specifications Table 2.1 shows the function specifications of the IDD. Table 2.1 Function specifications Specification Item MAJ3364 series MAJ3182 series MAJ3091 series MAH3182 series MAH3091 series Formatted capacity/device (*1) 36.4 GB 18.2 GB 9.1 GB 18.2 GB 9.1 GB Unformatted capacity/device 46.6 GB 23.3 GB...
  • Page 32 The formatted capacity can be changed by changing the logical block length and using spare sector (*1) space. See Chapter 3 for the further information. The number of user cylinders indicates the max., and includes the alternate cylinder. The number (*2) of user cylinders and alternate cylinders can be specified at format of the IDD.

  • Page 33: Environmental Specifications

    2.1.3 Environmental specifications Table 2.2 lists environmental and power requirements. Table 2.2 Environmental/power requirements Specification Item MAJ3364 series MAJ3182 series MAJ3091 series MAH3182 series MAH3091 series Operating 5 to 50°C Non-operating –40 to 60°C Temperature (*1) DE surface temperature at operating 5 to 55°C Gradient 15°C/h or less...

  • Page 34: Error Rate

    2.1.4 Error rate Errors detected during initialization and replaced by alternate block assignments are not included in the error rate. Data blocks to be accessed should be distributed over the disk medium equally. Unrecoverable error rate Errors which cannot be recovered within 63 retries and ECC correction should not exceed 10 per bits.
  • Page 35 MTTR is the average time taken by a well-trained service mechanic to diagnose and repair a drive malfunction. The drive is designed for a MTTR of 30 minutes or less. Service life The service life under suitable conditions and treatment is as follows. The service life is depending on the environment temperature.

  • Page 36: Scsi Function Specifications

    SCSI Function Specifications Table 2.3 shows the SCSI functions provided with the IDD. Table 2.3 SCSI function specifications Item Specification Ο Single-ended type × HVD type (High Voltage Differential) Ο LVD type (Low Voltage Differential) Electrical Ο 160/m LVD type (Low Voltage Differential) requirements ×...
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  • Page 38: Chapter 3 Data Format

    CHAPTER 3 DATA FORMAT Data Space Logical Data Block Addressing Defect Management This chapter explains data space definition, logical data block addressing, and defect management on the IDD. Data Space The IDD manages the entire data storage area divided into the following three data spaces. •...

  • Page 39: Cylinder Configuration

    Cylinder –70 Internal test cylinder Internal test space Cylinder –63 SA56 Cylinder –59 System space • Cylinder –4 Cylinder 0 Primary Cylinder 0 Cylinder 1 • • Primary Cylinder (n–1) User space • • n–2 n–1 Spare sector for each cylinder n = MAH3182 series: 17,545 MAH3091 series: 17,686 MAJ3364 series: 14,792...

  • Page 40: Zone Layout And Track Capacity (Maj3364 Series/Maj3182 Series)

    Table 3.1 Zone layout and track capacity (MAJ3364 series/MAJ3182 series) Zone Cylinder 0 to 749 750 to 1,500 to 2,180 to 2,860 to 4,040 to 5,035 to 6,030 to 1,499 2,179 2,859 4,039 5,034 6,029 7,229 Byte/track 373,107 373,107 369,157 364,070 353,177 345,696...

  • Page 41: Zone Layout And Track Capacity (Mah Series)

    Table 3.3 Zone layout and track capacity (MAH series) Zone Cylinder 0 to 859 860 to 1,960 to 2,640 to 3,970 to 5,150 to 6,430 to 7,760 to 1,959 2,639 3,969 5,149 6,429 7,759 8,689 Byte/track 418,715 404,500 397,667 386,000 375,667 363,750 348,917...

  • Page 42: Alternate Spare Area

    System space The system space is an area for exclusive use of the IDD itself and the following information are recorded. The length of the data block is always 512 bytes. • Defect list (P list and G list) • MODE SELECT parameter (saved value) •...

  • Page 43: Track Format

    The user space and the CE space share the alternate cylinders. Figure 3.3 Alternate cylinder Note: Zero cannot be specified for both the number of spare sectors in each cylinder and the number of alternate cylinders. 3.1.3 Track format Physical sector allocation Figure 3.4 shows the allocation of the physical sectors in a track.

  • Page 44: Track Skew/Cylinder Skew

    Track skew and cylinder skew To avoid waiting for one turn involved in head and cylinder switching, the first logical data block in each track is shifted by the number of sectors (track skew and cylinder skew) corresponding to the switching time. Figure 3.5 shows how the data block is allocated in each track. At the head switching location in a cylinder, the first logical data block in track t + 1 is allocated at the sector position which locates the track skew behind the sector position of the last logical data block sector in track t.

  • Page 45: Sector Format

    3.1.4 Sector format Each sector on the track consists of an ID field, a data field, and a gap field which separates them. Figure 3.6 gives sector format examples. DATA1 SM2 DATA2 BCRC Sync Servo DATA1 SM2 DATA3 PAD G2 DATA1 SM2 DATA4 BCRC ECC Sync...
  • Page 46 Data field (DATA1-DATA4) User data is stored in the data field of the sector. The length of the data field is equal to that of the logical data block which is specified with a parameter in the MODE SELECT command. Any even number between 512 and 528 bytes can be specified as the length.

  • Page 47: Format Capacity

    3.1.5 Format capacity The size of the usable area for storing user data on the IDD (format capacity) varies according to the logical data block or the size of the spare sector area. Table 3.4 lists examples of the format capacity when the typical logical data block length and the default spare area are used.

  • Page 48: Logical Data Block Addressing

    Logical Data Block Addressing Independently of the physical structure of the disk drive, the IDD adopts the logical data block addressing as a data access method on the disk medium. The IDD relates a logical data block address to each physical sector at formatting. Data on the disk medium is accessed in logical data block units.

  • Page 49: Defect Management

    Defect Management 3.3.1 Defect list Information of the defect location on the disk is managed by the defect list. The following are defect lists which the IDD manages. • P list (Primary defect list): This list consists of defect location information available at the disk drive shipment and is recorded in a system space.
  • Page 50 The alternate block allocation is executed by the FORMAT UNIT command, the REASSIGN BLOCKS command, or the automatic alternate block allocation. Refer to OEM Manual–SCSI Logical Specifications–for details of specifications on these commands. The logical data block is allocated to the next physically continued sectors after the above sector slip treatment is made. On the other hand, the logical data block is allocated to spare sectors which are not physically consecutive to the adjacent logical data blocks.

  • Page 51: Alternate Block Allocation By Format Unit Command

    : n represents a logical data block number : Defective sector : Unused spare sector Figure 3.7 Alternate block allocation by FORMAT UNIT command If the data block verifying operation (certification) is not permitted (DCRT flag = 0) in the FORMAT UNIT command, the IDD checks all initialized logical data blocks by reading them out after the above alternate block allocation is made to initialize (format) the disk.

  • Page 52: Alternate Block Allocation By Reassign Blocks Command

    Alternate block allocation by REASSIGN BLOCKS command When the REASSIGN BLOCKS command is specified, the alternate block is allocated to the defective logical data block specified by the initiator by means of alternate sector treatment. If there are unused spare sectors in the same cylinder as the specified defective logical data block, the alternate block is allocated to these unused spare sectors.
  • Page 53 Automatic alternate block allocation • Automatic alternate block allocation at read operation If the ARRE flag in the MODE SELECT parameter permits the automatic alternate block allocation, the IDD automatically executes the alternate block allocation and data duplication on the defective data block detected during the READ or READ EXTENDED command. This allocation method is the same as with the REASSIGN BLOCKS command (alternate sector treatment).

  • Page 54: Chapter 4 Installation Requirements

    CHAPTER 4 INSTALLATION REQUIREMENTS Mounting Requirements Power Supply Requirements Connection Requirements This chapter describes the environmental, mounting, power supply, and connection requirements. Mounting Requirements 4.1.1 External dimensions Figures 4.1 to 4.4 show the external dimensions of the IDD and the positions of the holes for the IDD mounting screws.

  • Page 55: External Dimensions (Mah Series Mc Model)

    3.175 ± 0.25 Figure 4.1 External dimensions (MAH series MC model) 4 - 2 C141-E103-01EN...
  • Page 56 )LJXUH ([WHUQDOGLPHQVLRQV 0$+VHULHV03PRGHO &((1 ...

  • Page 57: External Dimensions (Maj Series Mc Model)

    3.175 ± 0.25 Figure 4.3 External dimensions (MAJ series MC model) 4 - 4 C141-E103-01EN...
  • Page 58 )LJXUH ([WHUQDOGLPHQVLRQV 0$-VHULHV03PRGHO &((1 ...

  • Page 59: Mounting

    4.1.2 Mounting The permissible directions of the IDD are shown in Figure 4.7, and the tolerance of the angle is ±5° from the horizontal plane. (c) Vertical –1 (a) Horizontal –1 (b) Horizontal –2 Direction of gravity (d) Vertical –2 (e) Upright mounting –1 (f) Upright mounting –2 Figure 4.5...

  • Page 60: Mounting Frame Structure

    Figure 4.6 Mounting frame structure Limitation of side-mounting Mount the IDD using the 4 screw holes at the both ends on the both sides as shown in Figure 4.7. Do not use the center hole by itself. In case of using the center hole, it must be used in combination with 2 holes on both ends. (Total 6 screws for 6 holes enclosed) Holes for mounting screw.

  • Page 61: Surface Temperature Measurement Points

    Environmental temperature Temperature condition at installed in a cabinet is indicated with ambient temperature measured 3 cm from the disk drive. At designing the system cabinet, consider following points. • Make a suitable air flow so that the DE surface temperature does not exceed 55°C. •...

  • Page 62: Service Clearance Area

    Service clearance area The service clearance area, or the sides which must allow access to the IDD for installation or maintenance, is shown in Figures 4.9. [Surface P’] • Setting terminal • External operator panel connector • Spindle sync connector [Surface R] •...

  • Page 63: Air Pressure Adjustment Hole

    MAJ series Air pressure adjustment hole Figure 4.10 Air pressure adjustment hole 4 - 10 C141-E103-01EN...

  • Page 64: Power Supply Requirements

    Power Supply Requirements Allowable input voltage and current The power supply input voltage measured at the power supply connector pin of the IDD (receiving end) must satisfy the requirement given in Subsection 2.1.3. (For other requirements, see Items (4) and (5) below.) Current waveform (reference) Figure 4.11 shows the waveform of +12 VDC.

  • Page 65: Power On/Off Sequence (3)

    Figure 4.12 Power on/off sequence (1) c) In a system which does not use the terminating resistor power supply signal (TERMPWR) on the SCSI bus, the requirements for +5 VDC given in Figure 4.13 must be satisfied between the IDD and the SCSI device with the terminating resistor circuit. SCSI devices with the terminating resistor...

  • Page 66: Ac Noise Filter (Recommended)

    Sequential starting of spindle motors After power is turned on to the IDD, a large amount of current flows in the +12 VDC line when the spindle motor rotation starts. Therefore, if more than one IDD is used, the spindle motors should be started sequentially using one of the following procedures to prevent overload of the power supply unit.

  • Page 67: Connection Requirements

    Connection Requirements 4.3.1 68 pin connector 16-bit SCSI model (MP model) Connectors Figures 4.16 show the locations of connectors and terminals on the 68 pin connector type 16-bit SCSI (MP) model. • Power supply connector • SCSI connector • External operator panel connector External operator panel connector (CN2) MAH series...

  • Page 68: Bit Scsi Interface Connector

    SCSI connector and power supply connector a. 16-bit SCSI The connector for the SCSI bus is an unshielded P connector conforming to SCSI-3 type which has two 34-pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.17 shows the SCSI connector.

  • Page 69: External Operator Panel Connector (Cn1)

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

  • Page 70: External Operator Panel Connector (Cn2)

    Figure 4.20 External operator panel connector (CN2) C141-E103-01EN 4 - 17...
  • Page 71 External operator panel connector Signals a. 16-bit SCSI –ID3, –ID2, –ID1, –ID0: Input signals (CN1-A1, A3, A5, A7 pin and CN2-02, 04, 06, 08 pin) These signals are used for providing switches to set the SCSI ID of the IDD externally. Figure 4.21 shows the electrical requirements.
  • Page 72 b. –Fault LED: Output signal (CN1-A2 pin) The IDD indicates that the write-protect status is in effect (CN1-A12 is connected to the GND, or the CN2-9 and CN2-10 are short-circuited.) A signal for driving the LED is output. (IDD) 74LS06 or equivalent 150 Ω...

  • Page 73: Output Signal For External Led

    Figure 4.22 Output signal for external LED e. –WTP: Input signal (CN1-A12 and CN2-9, 10 pin) By connecting the CN1-A12 and CN2-10 pins to the GND, writing operations into the IDD disc media are set to disable. 4 - 20 C141-E103-01EN...

  • Page 74: Scsi Cables Connection

    Cable connection requirements The requirements for cable connection between the IDD, host system, and power supply unit are given in Figure 4.23. Recommended components for connection are listed in Table 4.2. External operator panel (example) Figure 4.23 SCSI cables connection C141-E103-01EN 4 - 21...

  • Page 75: Sca2 Type Scsi Model (Mc Model)

    4.3.2 SCA2 type SCSI model (MC model) Connectors Figure 4.24 shows the locations of connectors and terminals on the SCA2 type SCSI model. SCSI connector (including power supply connector) External operator panel connector (CN2) External operator panel connector (CN2) SCSI connector (CN1) SCSI connector (CN1) Figure 4.24 Connectors and terminals location of MC model 4 - 22...

  • Page 76: Sca2 Type Scsi Connector

    SCSI connector and power supply connector a. SCA type SCSI The connector for the SCSI bus is an unshielded SCA-2 connector conforming to SCSI-3 type which has two 40-pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.25 shows the SCSI connector.

  • Page 77: External Operator Panel Connector (Cn2)

    Connector for external operator panel • Connector external operator panel A connector for the external operator panel are provided on the IDD as shown in Figure 4.26. This allows to place externally LED on the front panel, or an SCSI ID setting switch. Figure 4.26 External operator panel connector (CN2) 4 - 24 C141-E103-01EN...
  • Page 78 External operator panel connector Signals a. 16-bit SCSI –ID3, –ID2, –ID1, –ID0: Input signals (CN-2-02, 04, 06, 08 pin) These signals are used for providing switches to set the SCSI ID of the IDD externally. Figure 4.27 shows the electrical requirements. (IDD) CN2-08 CN2-06...

  • Page 79: Cable Connector Requirements

    — Power supply cable Cable socket 1-480424-0 (CN1) housing Contact 170121-4 Cable AWG20 External operator Cable socket FCN-723J012/2M Fujitsu Limited panel (CN1) housing Contact FCN-723J-G/AM Fujitsu Limited Cable AWG26 to 34 External operator Cable socket FCN-723J016/2M Fujitsu Limited panel (CN2)

  • Page 80: External Operator Panel

    External operator panel The external operator panel is installed only when required for the system. When connection is not required, leave open the following pins in the external operator panel connector of the IDD : Pins 21, 22 and pins 01 through 08 in CN2 and pins A1 through A12 in CN1. 4.3.4 External operator panel A recommended circuit of the external operator panel is shown in Figure 4.28.
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  • Page 82: Chapter 5 Installation

    CHAPTER 5 INSTALLATION Notes on Handling Drives Connections Setting Terminals Mounting Drives Connecting Cables Confirming Operations after Installation and Preparation for Use Dismounting Drives Spare Disk Drive This chapter describes the notes on handling drives, connections, setting switches and plugs, mounting drives, connecting cables, confirming drive operations after installation and preparation for use, and dismounting drives.
  • Page 83 c) Be careful not to give excess pressure to the PCAs and interface connector when removing the drive from the antistatic bag. d) Do not remove the sealing label or cover of the DE and screws. Installation/removal/replacement a) Do not attempt to connect or disconnect connections when power is on. The only pin settings that may be altered are pins 9, 10 (Write Protect) in CN2.

  • Page 84: Connections

    Connections Figure 5.1 shows examples of connection modes between the host system and the IDD. For the 16- bit SCSI, up to 16 devices including the host adapter, IDD, and other SCSI devices can be connected to the SCSI bus in arbitrary combinations. Install a terminating resistor on the SCSI device connected to both ends of the SCSI cable.
  • Page 85 Connecting more than one IDD (multi-host) Figure 5.1 SCSI bus connections (2 of 2) 5 - 4 C141-E103-01EN...

  • Page 86: Setting Terminals

    Setting Terminals The user must set the following terminals and SCSI terminating resistor before installing the IDD in the system. • Setting terminal: Figures 5.2 shows the setting terminal position. Figures 5.3 shows the allocation and default settings. CAUTION Data loss The user must not change the setting of terminals not described in this section.

  • Page 87: Scsi Id Setting

    MP model Terminal power supply: Supply (LED signal) (IDD Reset signal) N.C. Force Single Ended: LVD mode Force Narrow: 16bit-SCSI Spin-up mode Write protect: enabled SCSI ID #15 (MP model) # 0 (MC model) MC model Figure 5.3 Setting terminals (CN2) 5.3.1 SCSI ID setting Table 5.1 shows the SCSI ID setting.

  • Page 88: Each Mode Setting

    Table 5.1 SCSI ID setting (CN2) SCSI ID Open Open Open Open Open Open Open Short Open Open Short Open Open Open Short Short Open Short Open Open Open Short Open Short Open Short Short Open Open Short Short Short Short Open Open...

  • Page 89: Motor Start Mode Setting

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

  • Page 90: Mode Settings

    Table 5.5 Setting of the SCSI interface operation mode (CN2) Operation mode CN2 15-16 Follows the DIFFSNS signal level on the SCSI bus Open * Single-Ended mode Short * Set at factory shipment Setting the bus width of the SCSI interface By establishing a short-circuit between the 13 and 14 CN2 setting terminals, the bus width for the SCSI interface is forcibly set to the 8-bit bus mode.

  • Page 91: Mounting Drives

    Mounting Drives 5.4.1 Check before mounting Reconfirm if the setting terminals are set correctly according to Table 5.8 before mounting the drive in the system cabinet. For setting terminals location, see Section 5.3. Table 5.8 Setting check list Setting contents Setting Setting Check...

  • Page 92: Connecting Cables

    Connecting Cables Connect the IDD and system with the following cables. See Section 4.3 for further details of the requirements for IDD connector positions and connecting cables. • Power cable • SCSI cable • External operator panel cable (if required) The general procedures and notes on connecting cables are described below.

  • Page 93: Confirming Operations After Installation And Preparation For Use

    Confirming Operations after Installation and Preparation for use 5.6.1 Confirming initial operations This section describes the operation check procedures after power is turned on. Since the initial operation of the IDD depends on the setting of the motor start mode, check the initial operation by either of the following procedures.

  • Page 94: Checking Scsi Connection

    d) If an error is detected in initial self-diagnosis the LED blinks. In this case, it is recommended to issue the REQUEST SENSE command from the initiator (host system) to obtain information (sense data) for error analysis. IMPORTANT The LED lights during the IDD is executing a command. However, in same commands, the lighting time is only an instant.

  • Page 95: Checking The Scsi Connection (A)

    Motor starts when power is turned on Figure 5.4 Checking the SCSI connection (A) 5 - 14 C141-E103-01EN...

  • Page 96: Checking The Scsi Connection (B)

    Motor starts by START/STOP command * Executing time: about 60 seconds Figure 5.5 Checking the SCSI connection (B) C141-E103-01EN 5 - 15...

  • Page 97: Formatting

    Checking at abnormal end a) When sense data can be obtained with the REQUEST SENSE command, analyze the sense data and retry recovery for a recoverable error. Refer to Chapter 5 of SCSI Logical Interface Specifications for further details. b) Check the following items for the SCSI cable connection: •...
  • Page 98 b. Format parameter (page code = 3) Specify the number of spare sectors for each cylinder in the "alternate sectors/zone" field and specify the number of tracks for alternate cylinders (= number of alternate cylinders × number of disk drive heads) in the "alternate tracks/zone" field. It is recommended not to specify values smaller than the IDD default value in this field.

  • Page 99: Setting Parameters

    5.6.4 Setting parameters The user can specify the optimal operation mode for the user system environments by setting the following parameters with the MODE SELECT or MODE SELECT EXTENDED command: • Error recovery parameter • Disconnection/reconnection parameter • Caching parameter •...
  • Page 100 The saved value of the MODE SELECT parameter is assumed as the initial value of each parameter after the power-on, the RESET condition, or the BUS DEVICE RESET message. The INIT can change the parameter value temporary (actively) at any timing by issuing the MODE SELECT or MODE SELECT EXTENDED command with specifying "0"...
  • Page 101 Notes: The user can arbitrarily specify the following parameters according to the system requirements: • ARRE • • The user also can arbitrarily specify parameters other than the above. However, it is recommended to use the default setting in normal operations. Disconnection/reconnection parameters (page code = 2) The following parameters are used to optimize the start timing of reconnection processing to transfer data on the SCSI bus at a read (READ or READ EXTENDED command) or write...
  • Page 102 Caching parameters The following parameters are used to optimize IDD Read-Ahead caching operations under the system environments. Refer to Chapter 2 of SCSI Logical Interface Specifications for further details. a. Read caching parameters Parameter Default value • RCD: Disabling Read-Ahead caching operations 0 (enabled) •...

  • Page 103: Dismounting Drives

    a. Control mode parameters Parameter Default value • Queue algorithm modifier 0 (Ordering is executed by read command only.) • QErr: Resume or abort remaining suspended 0 (command is commands after sense pending state resumed) • DQue: Disabling tagged command queuing 0 (enabled) Dismounting Drives Since dismounting the drive to check the setting terminals, change the setting, or change the drive...

  • Page 104: Chapter 6 Diagnostics And Maintenance

    CHAPTER 6 DIAGNOSTICS AND MAINTENANCE Diagnostics Maintenance Information Operation Check Troubleshooting Procedures This chapter describes diagnostics and maintenance information. Diagnostics 6.1.1 Self-diagnostics The IDD has the following self-diagnostic function. This function checks the basic operations of the IDD. • Initial self-diagnostics •...
  • Page 105 Brief test contents of self-diagnostics are as follows. a. Hardware function test This test checks the basic operation of the controller section, and contains following test. • RAM (microcode is stored) • Peripheral circuits of microprocessor (MPU) • Memory (RAM) •...
  • Page 106 The IDD does not reply to the SCSI bus for up to 2 seconds after the initial self-diagnostics is started. After that, the IDD can accept the I/O operation request correctly, but the received command, except the executable commands under the not ready state (such as INQUIRY, START/STOP UNIT), is terminated with the CHECK CONDITION status (NOT READY [=2]/logical unit not ready [=04-00]) during the interval from the spindle motor becomes stable to the IDD becomes ready.

  • Page 107: Test Programs

    When an error is detected in the self-diagnostics, the IDD terminates the SEND DIAGNOSTIC command with the CHECK CONDITION status. At this time only when an error is detected in the hardware function test, the LED on the front panel of the disk drive blinks. The INIT should issue the REQUEST SENSE command when the CHECK CONDITION status is posted.

  • Page 108: Maintenance Information

    Interface (SCSI bus) test The operations of the SCSI bus and data buffer on the IDD are checked with the WRITE BUFFER and READ BUFFER commands. Basic operation test The basic operations of the IDD are checked by executing self-diagnosis with the SEND DIAGNOSTIC command (see Subsection 6.1.1).

  • Page 109: Maintenance Requirements

    CAUTION Always ground yourself with a wrist strap connected to ground before handling. ESD (Electrostatics Discharge) may cause the damage to the device. To prevent electrical damage to the disk drive, turn the power off before mounting or removing a PCA or connecting or disconnecting a cable, connector, or plug.
  • Page 110 The PCA cannot be replaced in the field. The DE cannot be replaced in the field. Service system and repairs Fujitsu has the service system and repair facility for the disk drive. Contact Fujitsu representative to submit information for replacing or repairing the disk drive.

  • Page 111: Maintenance Levels

    Replacement is usually done by the user, retail dealer, distributor, or OEM engineer. Factory maintenance (parts replacement) • This replacement can only be done by Fujitsu. • Replacement includes maintenance training and OEM engineer support. OEM engineers usually support retail dealers and distributors.

  • Page 112: Revision Numbers

    6.2.4 Revision numbers The revision number of the disk drive is represented with a letter and a number indicated on the revision label attached to the DE. Figure 6.1 shows the revision label format. Machine revision Figure 6.1 Revision label Indicating revision number at factory shipment When the disk drive is shipped from the factory, the revision number is indicated by deleting numbers in the corresponding letter line up to the corresponding number with = (see Figure 6.2).

  • Page 113: Tools And Test Equipment

    IMPORTANT When the revision number is changed after the drive is shipped from the factory, Fujitsu issues "Engineering Change Request/Notice" in which the new revision number is indicated. When the user changes the revision number, the user should update the revision label as described in item (2) after applying the modification.

  • Page 114: Test Flowchart

    Start Start self-test by turning the power on Check host system Test results OK? (Table 6.2) Analyze system-related Host system Execute an operation error normal? test using a host computer or test equipment Replaced or repair disk drive Test results OK? Disk drive normal? Continue operation...

  • Page 115: Operation Check

    Operation Check 6.3.1 Initial seek operation check If an error is detected during initialization by the initial seek operation check routine at power-on, the LED on the front panel blinks. The spindle motor of the disk drive then stops, and the disk drive is unusable.

  • Page 116: Troubleshooting Procedures

    Troubleshooting Procedures 6.4.1 Outline of troubleshooting procedures This section explains the troubleshooting procedures for disk drive errors. Depending on the maintenance level, analyze the error to detect a possibly faulty part (disk drive, recommended spare part, or disk drive part). Full-scale troubleshooting is usually required if the error cause is not known.

  • Page 117: System-Level Field Troubleshooting

    Table 6.2 System-level field troubleshooting Item Recommended work DC power cable Check that the power cable is correctly connected to the disk drive and power supply unit. AC and DC power level Check that the DC voltage is within the specified range (±5%). Check that the +5 VDC value (pins 3 and 4 of the power connector) is 4.75 to 5.25 VDC.

  • Page 118: Troubleshooting At The Repair Site

    6.4.3 Troubleshooting at the repair site For maintenance at this level, we recommend additional testing of the disk drive and signal checking. The sense data posted from the IDD helps with troubleshooting. This sense data makes the error type clear (functional, mechanical, or electrical error). Chapter 7 error analysis by sense data, and gives supplementary information on finding the error cause (faulty part).

  • Page 119: Troubleshooting With Parts Replacement In The Factory

    6.4.4 Troubleshooting with parts replacement in the factory This manual does not cover troubleshooting at the factory level. 6.4.5 Finding possibly faulty parts Finding possibly faulty parts in the field was explained in Subsection 6.4.2. This manual does not cover finding possibly faulty parts at the factory level. 6 - 16 C141-E103-01EN...

  • Page 120: Chapter 7 Error Analysis

    CHAPTER 7 ERROR ANALYSIS Error Analysis Information Collection Sense Data Analysis This chapter explains in detail how sense data collected from a disk drive is used for troubleshooting. Sense data reflects an error in the disk drive, and helps with troubleshooting. A sense key, sense code, and subsense code, taken from various sense data are repeated.

  • Page 121: Format Of Extended Sense Data

    Bit 7 Byte 0 Valid X‘70’ or X‘71’ (error code) X‘00’ Sense key [MSB] Information [LSB] X‘28’ (additional sense data length) Basic [MSB] information Command-specific information [LSB] Sense code Subsense code X‘00’ SKSV Sense key-specific information SCSI ID CDB operation code Additional information Detail information...

  • Page 122: Sense Data Analysis

    Sense Data Analysis 7.2.1 Error information indicated with sense data Subsection 7.2.2 onwards explain troubleshooting using sense data. Table 7.1 lists the definition of sense data. For details of sense data, refer to the SCSI Logical Interface Specifications. Table 7.1 Definition of sense data Sense data Sense...

  • Page 123: Sense Data (4-03-Xx), (4-40-Xx), (4-44-Xx), And (4-C4-Xx)

    7.2.2 Sense data (4-03-xx), (4-40-xx), (4-44-xx), and (4-C4-xx) Sense data (4-03-xx), (4-40-xx), (4-44-xx), and (4-C4-xx) indicate one of the following: • A target sector could not be detected using the sector counter. • A seek process overran the specified time. •...

  • Page 124: Chapter 8 Principle Of Operation

    CHAPTER 8 PRINCIPLE OF OPERATION Outline Disk Drive Configuration Circuit Configuration Power-On Sequence Factory-Calibration Read/Write Circuit Servo Control This chapter explains the general design concepts of the disk drive. It also explains the main parts, sequences, servo control method, and the main electrical circuits of the drive at the block level. Outline The principle of operation of this disk drive can be divided into two parts.

  • Page 125: Disks

    8.2.1 Disks The disk configuration of each DE is shown as follows: • The DE for the MA3182 series contains 2 disks whose external diameter is 95 mm and internal diameter is 25 mm. • The DE for the MAH3091 series contains 1 disks whose external diameter is 95 mm and internal diameter is 25 mm.

  • Page 126: Circuit Configuration

    The circulation filter catches dust or dirt that may get inside the DE. Air is continuously circulating inside the drive and passing through the circulation filter, utilizing a closed loop air circulation system that uses the blower effect of the rotating disks. Circuit Configuration Figure 8.1 shows the circuit configuration of IDD.

  • Page 127: Circuit Configuration

    Figure 8.1 Circuit configuration 8 - 4 C141-E103-01EN...

  • Page 128: Power-On Sequence

    Power-On Sequence Figure 8.2 shows the operation sequence of the IDD at power-on. The processes shown in this figure are explained below: 1) After the power is turned on, the IDD executes self-diagnosis 1 (MPU bus test, internal register write/read test, and work RAM write/read test). 2) When self-diagnosis 1 terminates successfully, the IDD activates the spindle motor when the motor start mode is set (SW1 is on;...

  • Page 129: Factory-Calibration

    Factory-Calibration Factory calibration is intended to correct errors in the mechanisms and circuits and maintain stable seek, read or write operation. External force adjustment Even if the actuator stops at a fixed position, disturbing forces such as an FPC force and air movement caused by disk rotation are exerted.
  • Page 130  :ULWHFLUFXLW 7KH ZULWH GDWD LV FRQYHUWHG LQWR WKH 15= GDWD :'7 E\ 6&6, FRQWUROOHU  DQG LV VHQW WRJHWKHU ZLWKWKH:ULWHFORFN :&/. VLJQDOWRWKHZULWHFLUFXLW7KH15=GDWDLVFRQYHUWHGLQWR 5//FRGHE\WKHHQFRGHUFLUFXLWDQGLVZULWWHQWRWKHGLVN )LJXUH %ORFNGLDJUDPRIUHDGZULWHFLUFXLW &((1 ...

  • Page 131: Read Circuit

    8.6.3 Read circuit After fixing the data output from the head IC to a certain level by Automatic Gain Control (AGC), the Read circuit converts the waveform digitally by Analog to Digital Converter (ADC) circuit via analog filter circuit. And then, after equalization by Finite Impulser Response filter (FIR filter), being converted to logic signal by Viterbi detection circuit, convert into NRZ data by 32/34 decoding circuit, and then the Read circuit sends the data to buffer memory.
  • Page 132 Table 8.2 MAJ3091 series data frequency and recording density in each zone Zone 1,340 2,250 3,220 4,555 5,490 Cylinder 1,339 2,249 3,219 4,554 5,489 6,654 1F(MFRPS) 66.2 64.6 62.7 60.6 57.7 55.7 53.2 2F(MFRPS) 264.9 258.5 250.8 242.4 230.9 222.8 212.8 304,591 304,844...

  • Page 133: Servo Control

    Servo Control The servomechanism is controlled using a digital servo technique by the firmware in the digital signal processor (DSP). DPS carries out VCM control. Control of the voice coil motor consists of track-following operation control and seek operation control. Track-following operation is controlled to center the data-head-mounted actuator over the target cylinder for read/write operation.

  • Page 134: Servo Format

    SPM/VCM driver The power amp drive signal output by the DSP (digital signal processor) is converted to a current for driving the VCM. This consists of a controller which controls the sensor-less spindle motor by detecting the counter electro-motive voltage and a power MOSFET which drives the spindle motor. (MAH series, MAJ3182 series and MAJ3091 series contain a power transistor inside the SPM/VCM combo.) 8.7.2 Servo format...

  • Page 135: Position Of Servo Track

    • Preparation of servo mark detection • 2) Servo mark area Servo mark patterns are written in the servo mark areas and patterns are detected by the length of the DC areas. The servo mark determines the starting point for detecting a position pattern and gray code pattern.

  • Page 136: Servo Frame Format

    8.7.3 Servo frame format Servo W/R recovery Gray code/Position mark Figure 8.6 Servo frame 8.7.4 Spindle motor control The SCSI control MDU controls the senseless 3-phase spindle motor. It carries out start / normal rotation control and spindle synch control in accordance with commands from the SCSI unit. Activation The SCSI control MPU carries out control of the spindle motor from the stopped condition to normal rotation by the following sequence.
  • Page 137 RTZ operation When the power is turned on, or when a REZERO UNIT COMMAND is issued from the host computer, the DSP moves the head to the reference cylinder (cylinder 0) by an internal command from the MPU. Seek operation When the host issues a data read/write request, the MPU issues a seek command to the DSP to move the head to a target cylinder.
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  • Page 139 APPENDIX A LOCATIONS OF CONNECTORS AND SETTING TERMINALS Locations of Connectors and Setting Terminals (MAH series MC model) Locations of Connectors and Setting Terminals (MAH series MP model) Locations of Connectors and Setting Terminals (MAJ series MC model) Locations of Connectors and Setting Terminals (MAJ series MP model) This appendix shows the locations of connectors and setting terminals.

  • Page 140: Locations Of Connectors And Setting Terminals (Mah Series Mc Model

    Locations of Connectors and Setting Terminals (MAH series MC model) 15/16 (viewed from bottom side) Figure A.1 Locations of connectors and setting terminals (MAH series MC model) A - 2 C141-E103-01EN...

  • Page 141: Locations Of Connectors And Setting Terminals (Mah Series Mp Model

    Locations of Connectors and Setting Terminals (MAH series MP model) 23/24 (viewed from bottom side) Figure A.2 Locations of connectors and setting terminals (MAH series MP model) C141-E103-01EN A - 3...

  • Page 142: Locations Of Connectors And Setting Terminals (Maj Series Mc Model

    Locations of Connectors and Setting Terminals (MAJ series MC model) 15/16 (viewed from bottom side) Figure A.3 Locations of connectors and setting terminals (MAJ series MC model) A - 4 C141-E103-01EN...

  • Page 143: Locations Of Connectors And Setting Terminals (Maj Series Mp Model

    Locations of Connectors and Setting Terminals (MAJ series MP model) 23/24 (viewed from bottom side) Figure A.4 Locations of connectors and setting terminals (MAJ series MP model) C141-E103-01EN A - 5...
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  • Page 145: Appendix Bsetting Terminals

    APPENDIX B SETTING TERMINALS Setting Terminals This appendix describes setting terminals. C141-E103-01EN B - 1...

  • Page 146: Setting Terminal: Cn2

    Setting Terminals Table B.1 Setting terminal: CN2 Setting item Pins Setting contents 9 - 10 7 - 8 5 - 6 3 - 4 1 - 2 SCSI ID (Open) Open Open Open SCSI ID #0 (Common to 8-bit and 16-bit SCSI) (*1) (Open) Open Open Short...
  • Page 147 For MC models Setting item Pins Setting contents 11 - 12 13 - 14 15 - 16 23 - 24 Motor start mode Open Started by turning the power supply on (*) Short Started by the START/STOP command Force Narrow Open Width of 16 bit bus (*) Short...
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  • Page 149: Appendix Cconnector Signal Allocation

    APPENDIX C CONNECTOR SIGNAL ALLOCATION SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI This appendix describes the connector signal allocation. C141-E103-01EN C - 1...

  • Page 150: Scsi Connector (Sca2 Type Lvd 16-Bit Scsi): Cn1

    SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI Table C.1 SCSI connector (SCA2 type LVD 16-bit SCSI): CN1 Pin No. Signal Signal Pin No. +12V (Charge) 12V RETURN (GND) +12V 12V RETURN (GND) +12V 12V RETURN (GND) +12V 12V RETURN (MATED 1) Reserved (N.C.) Reserved (N.C.) Reserved (N.C.)

  • Page 151: Scsi Connector (68 Pin Type Lvd 16-Bit Scsi): Cn1

    SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI Table C.2 SCSI connector (68 pin type LVD 16-bit SCSI): CN1 Pin No. Signal Signal Pin No. DB12 –DB12 DB13 –DB13 DB14 –DB14 DB15 –DB15 DBP1 –DBP1 DB00 –DB00 DB01 –DB01 DB02 –DB02...
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  • Page 153: Appendix Dmodel Names And Product Numbers

    APPENDIX D MODEL NAMES AND PRODUCT NUMBERS Model Names and Product Numbers This appendix lists model names (types) and product numbers. C141-E103-01EN D - 1...

  • Page 154: Model Names And Product Numbers

    (user area) 512B 18.2 GB #6-32UNC 25.4mm height MAH3182MP 68-pin, LVD CA05695-B250 7,200 min (7,200rpm) 2 disks MAH3182MC SCA2, LVD CA05695-B220 4 heads 512B 9.1 GB #6-32UNC 25.4mm height MAH3091MP 68-pin, LVD CA05695-B150 7,200 min (7,200rpm) 1 disks...
  • Page 155 46-8-626-4588 FAX: 886-2-717-4644 FUJITSU ITALIA S.p.A. FUJITSU SYSTEMS BUSINESS (MALAYSIA) SDN. BHD. Via Nazario Sauro, 38 20099 Sesto S. Giovanni (MI), ITALY Fujitsu Plaza, 1A, Jalan Tandang 204, P.O. Box 636 Pejabat Pos TEL: 39-2-26294-1 Jalan Sultan FAX: 39-2-26294-201 46770 Petaling Jaya, Selangor Darul Ehsan, Malaysia...
  • Page 156 FUJITSU LIMITED Reader Comment Form We would appreciate your comments and suggestions for improving this publication. Publication No. Rev. Letter Title Current Date How did you use this publication? Is the material presented effectively? Learning Sales Installing Fully Well Well...

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