
A C - 5 1 4 4 0 0    WESTERN DIGITAL
                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/SLIMLINE         Cylinders        |16383|     |
Capacity form/unform 14400/      MB        Heads            |   16|     |
Seek time   / track      /     ms          Sector/track     |   63|     |
Controller           IDE / ATA4            Precompensation
Cache/Buffer               KB              Landing Zone
Data transfer rate          MB/S int       Bytes/Sector      512
                            MB/S ext UDMA
Recording method                                    operating  | non-operating
                                                  -------------+--------------
Supply voltage                  Temperature *C                 |
Power: sleep              W     Humidity     %                 |
       standby            W     Altitude    km                 |
       idle               W     Shock        g                 |
       seek               W     Rotation   RPM
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h
                                Warranty Month
Lift/Lock/Park     YES          Certificates                                  

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                        L   A   Y   O   U   T
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WESTERN  CAVIAR  INSTALLATION GUIDE 79-850086-003 SO225  11/98


  +---------------------------------------------------------+
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XX Inter-
  |                                                         |XX face
  |                                                         |XX
  |                                                         |.X
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  |                                                         |X1
  |                                                         |+-+
  |                                                         || |J8
  |                                                         |+-1
  |                                                         |XX Power
  |                                                         |XX J3
  +---------------------------------------------------------+  1



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                      J   U   M   P   E   R   S
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WESTERN  CAVIAR SERIES  INSTALLATION GUIDE 79-000564-000

 Jumper setting
 ==============

 J8  Master/Slave Configuration
 ------------------------------

    +5-3-1+ Single Drive              +5-3-1+ Master Drive
    |o o o| Configuration             |X o o| Configuration
    |o o o|                           |X o o| (Dual Drives)
    +6-4-2+                           +6-4-2+


    +5-3-1+ Slave Drive
    |o X o| Configuration
    |o X o| (Dual Drives)
    +6-4-2+

 The Caviar can be assigned as either a single, master, or slave
 drive.

 Pins 1 & 2 are RESERVED; DO NOT jumper.


 Single Drive Mode
 -----------------
 If you are installing the Caviar drive as the only intelligent drive
 in the system, you do not need install jumpers on the J8 connector.
 This is considered a standard single drive installation, and no
 jumpers are required. Note that even with no jumper installed, the
 Caviar checks the DRIVE ACTIVE/SLAVE PRESENT (DASP) signal to de-
 termine if a slave intelligent drive is present.

 If you have a dual installation (two intelligent drives), you must
 designate one of the drives as the master and the other as the slave
 drive. The jumper pins on the J8 connector need to be configured for
 the dual installation.


 Master Drive Mode
 -----------------
 To designate the drive as the master, place a jumper shunt on pins
 5-6. With the Caviar configured as the master drive, the Caviar
 assumes that a slave drive is present. The jumper on pins 5-6 is
 optional if the slave drive follows the same protocol (Common Access
 Method AT Bus Attachment) as the Caviar.


 Slave Drive Mode
 ----------------
 To designate the drive as the slave, place a jumper shunt on pins
 3-4. When the Caviar is configured as the slave drive, the Caviar
 delays spin up for three seconds after powerup reset. This feature
 prevents overloading of the power supply during powerup.


 J3   DC Power and pin connector assignments
 -------------------------------------------
 -------------------+
 J8+  +-----J3-----+|  pin 1    +12 VDC
  1|  | 4  3  2  1 ||  pin 2    +12 Volts Return
  -+  +------------+|  pin 3    + 5 Volts Return
  ------------------+  pin 4    + 5 VDC



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                      I   N   S   T   A   L   L
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WESTERN  CAVIAR INSTALLATION

 Notes on installation
 =====================

 Installation direction
 ----------------------

     horizontally                           vertically
   +-----------------+             +--+                       +--+
   |                 |             |  +-----+           +-----+  |
   |                 |             |  |     |           |     |  |
 +-+-----------------+-+           |  |     |           |     |  |
 +---------------------+           |  |     |           |     |  |
                                   |  |     |           |     |  |
                                   |  |     |           |     |  |
 +---------------------+           |  +-----+           +-----+  |
 +-+-----------------+-+           +--+                       +--+
   |                 |
   |                 |
   +-----------------+

 The drive will operate in all axis (6 directions).

 Before you begin, gather these supplies:
 Computer system manual
 Operating system installation disks or CD-ROM
 Operating system manual
 Small Phillips screwdriver and flat-blade screwdriver
 Bootable DOS disk or Windows 95 startup disk
 Be sure to write down your serial and model numbers and the CCC
 code. These numbers are located on the drive label.


 Create a Bootable DOS Disk
 --------------------------
 For single hard drive installations, you must have a bootable DOS
 disk to install your new hard drive with EZ-Drive. Disk 1 of your
 standard DOS installation disk set is a bootable disk. If you do not
 have your original DOS installation disks, you can create a bootable
 DOS disk if you have a bootable C: hard drive.

 1. Insert a blank floppy disk into drive A.
 2. At the C: prompt, type format a:/s. Press ENTER.
    Create a Windows 95 Startup Disk
    For Windows 95 systems, you must have a bootable DOS or
    Windows 95 Startup disk to install your new hard drive with
    EZ-Drive. If using Windows 95, you should create a Windows 95
    Startup disk. To create a Windows 95 Startup disk you must have a
    bootable C: hard drive.

 1. Insert a blank floppy disk into drive A.
 2. From Windows 95, click My Computer.
 3. Click Control Panel.
 4. Click Add/Remove Programs.
 5. Select the Startup Disk table
 6. Click Create Disk. Follow the prompts to create a Windows 95
    Startup disk.


 Back Up Existing Drives
 -----------------------
 Protect your data by backing up your existing hard drive before
 installing your new Western Digital hard drive. Save the data to
 removable media such as floppy disks or tape. Most operating
 systems include a backup utility. Consult your operating system or
 utilities documentation for backup instructions.


 Unpacking and Handling the Hard Drive
 -------------------------------------
 Western Digital hard drives are precision instruments and should be
 handled with care during unpacking and installation. Hard drives are
 typically damaged by rough handling, shock, vibration, or
 electrostatic discharge (ESD). Be aware of the following precautions
 when unpacking and installing your Western Digital hard drive.
 Do not unpack your hard drive until you are ready to install it.
 After your Western Digital hard drive is unpacked, place the drive
 on the static shielding bag on a clean, level, padded work area.
 Your Western Digital hard drive comes packaged in a static
 shielding bag.

 Save the packing materials in case you need to return your hard
 drive. Shipping your hard drive in anything other than the
 original packaging or Western Digital supplied or approved materials
 will void your warranty.

 To avoid ESD problems, ground yourself by touching the metal
 chassis of the computer before handling the hard drive. Articles of
 clothing generate static electricity. Do not allow clothing to come
 in direct contact with the hard drive or circuit board components.
 Handle the hard drive by the sides only. Avoid touching the
 circuit board components. Do not drop or knock the hard drive.

 Before installation, do not stack hard drives or stand your Western
 Digital hard drive on its edge. You can, however, mount your hard
 drive horizontally or vertically.

 Do not remove the tape seal or any labels from the drive; the
 warranty will be void.


 Open Your Computer
 ------------------
 1. Turn off your system.
 2. Discharge static electricity by touching the metal chassis of the
    computer.
 3. Unplug your computer.
 4. Remove the computer's outside cover. Consult your computer
    system manual for details. Be sure to keep all screws and other
    parts together for easy reassembly.


 WD Caviar Series 3.5-Inch EIDE Hard Drives (EZ-Drive 9.06W)
 -----------------------------------------------------------
 This document is for use with EZ-Drive 9.06W. Check the version
 number on the EZ-Drive diskette.
 DRIVE   AC2540 AC2635 AC2700 AC2850
 AC21000 AC31000 AC11200 AC21200 AC31200 AC11600 AC21600 AC31600
 AC22000 AC12100 AC22500 AC12500 AC33100 AC13200 AC23200 AC33200
 AC34000 AC24300 AC34300 AC25100 AC35100 AC36400 AC38400 AC310100


 Removing Existing Hard Drives
 -----------------------------
 If replacing an existing drive, follow these instructions.

 IMPORTANT. Be sure to turn off the system power and unplug the
 power cord.

 1. Disconnect the power cord and IDE interface cable.
 2. Remove screws and slide the hard drive out of the drive bay.
    Handle the hard drive with care. Be careful not to scratch, tear,
    or remove the tape seal on the drive; this will void the warranty.

 Step 1. Jumpers
 ---------------
 Western Digital hard drives have a jumper block (J8) located next to
 the 40-pin IDE connector on the hard drive. These jumpers select
 options on the hard drive. Your hard drive may have either a 6-pin or
 10-pin jumper block. The first 6 pins on each jumper block are
 identical. The additional four pins on the 10-pin jumper block are
 reserved for future enhancements.

 The Western Digital hard drive is factory set for single drive
 installation with a jumper in the neutral storage position (across
 pins 5-3 or 6-4). The Cable Select jumper option is usually not
 required. It needs special support in your system hardware.


 Single Hard Drive Installation
 ------------------------------
 If installing your new Western Digital hard drive as the only hard
 drive in your system, leave the jumper in the neutral storage
 position for possible future use. Jumpers are not required for single
 hard drive installations.


 Dual Hard Drive Installation
 ----------------------------
 If installing your new Western Digital hard drive with an existing
 drive on the same IDE interface cable, use a jumper to designate the
 master (C:) and the slave (D:) drive.

 If installing your new Western Digital hard drive with an existing
 drive on separate IDE interface cables, leave the jumper in the
 neutral storage position for possible future use. The system
 recognizes each drive as a single, stand-alone drive. Master/slave
 jumper settings are only used when there are two devices on the same
 IDE interface cable.

 Note for Apple Users: Apple systems do not support master/slave
 configurations. You can only install one EIDE hard drive to each
 port.

 This jumper should be repositioned to select the following options:
 To designate the Western Digital hard drive as the master drive in
 a two-drive system, place the jumper on pins 5-6.

 To designate the Western Digital hard drive as the slave drive in a
 two-drive system, place the jumper on pins 3-4.

 If installing your new Western Digital hard drive with a non-Western
 Digital hard drive, obtain jumper configuration information from
 the EZ-Drive software diskette, or your original drive manufacturer.


 Setting the Jumper
 ------------------
 Carefully place the jumper over the two pins. Push the jumper into
 place until it is firmly seated against the base of the jumper block.


 Step 2. Mounting Hardware
 -------------------------
 Inspect the bay to determine whether it is a 3.5-inch or 5.25-inch
 bay. The Western Digital hard drive fits into a 3.5-inch bay.

 If installing the Western Digital hard drive in a 5.25-inch bay, you
 must install the 5.25-inch mounting hardware that is provided. You
 might also need to install the system manufacturer's drive rails.

 Consult your system manual for instructions on how to install a
 3.5-inch bay.


 Installing the 5.25 Mounting Hardware
 -------------------------------------
 This step is not required for hard drive installations into a
 3.5-inch drive bay.

 1. Gently place the hard drive horizontally (circuit board side down)
    on top of the static shielding bag placed on a flat, padded
    surface.

 2. Attach the mounting brackets to the hard drive using the screws
    provided. For proper grounding, be sure to use ALL FOUR screws.

 IMPORTANT. Be sure to use the screws provided in your hard
            drive package. Screws that are too long damage circuit
            board components. Each screw must engage no more than six
            threads (3/16 inch).


 Step 3. Drive Rails (Optional)
 ------------------------------
 Some computer systems have 5.25-inch drive bays that require unique
 sliding drive rails to complete the hard drive installation.

 Because each system manufacturer has a different type of drive rail,
 rails are not included with Western Digital hard drives. If your
 system requires drive rails, contact the computer system
 manufacturer. The following list provides phone numbers for
 common system manufacturers.


 IMPORTANT. Your system must be turned off before connecting
            or disconnecting the power supply to the drive.

 1. Thread the cable through the empty drive bay and slide in the
    Western Digital hard drive.

 2. Attach the end of the 40-pin IDE interface cable to the 40-pin
    connector on the back of the Western Digital hard drive. Match
    pin socket 1 on the IDE cable (indicated by a color stripe on the
    cable) to pin 1 on the Western Digital hard drive.

 Note for Apple Users: Do not use the IDE interface cable supplied
 in this package in an Apple system; use an Apple-supplied interface
 cable only. Pin 40 on an Apple-supplied interface cable is indicated
 by a color stripe on the cable.

 3. Attach the computer system power supply cable to the 4-pin
    power connector on the back of the Western Digital hard drive.
    The 4-pin connector is keyed to ensure proper insertion.

 4. Single Installations: Attach the end of the 40-pin IDE interface
    cable from the Western Digital hard drive to the 40-pin
    connector on the motherboard or controller card. Match pin
    socket 1 (indicated by a color stripe on the cable) on the IDE
    interface cable (next to the drive power connector) to pin 1 on
    the motherboard or controller card.

 Dual Installations: Connect the two hard drives by using a 40-pin,
 three-connector IDE interface cable. A 40-pin, three-connector
 IDE interface cable is included in this hard drive package. Match
 pin socket 1 on the 40-pin, three-connector IDE cable to pin 1
 on the drive's connector.

 5. Mount the Western Digital hard drive in the drive bay using the
    four mounting screws provided. For proper grounding, be sure to
    use ALL FOUR screws.

   If your system does not have an extra power connector, purchase a
   Y-adapter from your computer dealer.

 6. Check all cable connections. Replace the system cover.

 7. Plug in your computer.

 8. See the EZ-Drive Software Installation section for hard drive
    setup instructions.



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                      G   E   N   E   R   A   L
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WESTERN   8.4GB BARRIER

 8.4 GB Capacity Barrier -  3.5-inch EIDE Hard Drives
 ----------------------------------------------------
 Some system BIOSs and operating systems have limitations associated
 with large capacity hard drives. There are several PC components that
 have an EIDE hard drive capacity limitation at approximately 8.4 GB.
 These limitations apply to any hard drive that reports an EIDE
 capacity of 16320 cylinders x 16 heads x 63 sectors per track or
 larger. The following is a discussion of how these limitations affect
 the system BIOS Interrupt 13 functions, the operation of EIDE hard
 drives, and operating systems.


 System BIOS Interrupt 13 Functions
 ----------------------------------
 Interrupt 13 (INT 13) Functions:
 INT 13 Function 8 is the traditional method used by the system BIOS
 to access hard drives using cylinders, heads, and sectors per track
 (CHS). Identify Drive words 1, 3, and 6 contain these values. The
 maximum values the BIOS can report (1024 cylinders 256 heads, and 63
 sectors) have been exceeded by the 8.4 GB and larger hard drive
 capacities.

 Because some operating systems do not function properly with 256
 heads, all system BIOSs report a maximum number of 255 heads. There
 are times when a hard drive is large enough that INT 13 Function 8
 could report 1024 cylinders. However, it is common for only 1023
 cylinders to be reported.

 The remaining diagnostic cylinder is not made accessible through INT
 13 function calls.

 Extended INT 13 Functions:
 To utilize the full capacity of hard drives larger than 8.4 GB, the
 system BIOS must use extended INT 13 functions. To recognize the full
 capacity of hard drives larger than 8.4 GB, extended INT 13 functions
 use Identify Drive words 60 and 61 rather than words 1, 3, and 6.

 Many system BIOSs do not support extended INT 13 functions. DOS 6.22
 and earlier versions do not recognize or utilize these extended
 functions even if they exist in the BIOS. Windows 95, Windows 98,
 and boot disks created with Windows 95, are capable of utilizing
 these functions and recognizing hard drives larger than 8.4 GB.

 WDTBLCHK Version 2.00 and later can be used to determine if these
 functions are present.

 EIDE Hard Drives System BIOSs and operating systems check the
 capacity of EIDE hard drives by issuing an Identify Drive command.
 The hard drive reports the capacity in two ways:

 1. The number of cylinders, heads, and sectors per track (in words 1,
    3, and 6).

 2. The total number of addressable sectors (in words 60 and 61).
    Most EIDE 8.4 GB hard drives report their capacity as 16383
    cylinders, 16 heads, and 63 sectors per track in Identify Drive
    words 1, 3, and 6. This results in a total number of addressable
    sectors of 16,514,064 (8455 MB). 8.4 GB is the largest capacity
    that can be reported with words 1, 3, and 6 because the maximum
    value these words can hold are 16383x16x63.

    To determine the true capacity of hard drives larger than 8.4
    GB, the system BIOS must access Identify Drive words 60 and 61 and
    use the total addressable sectors.


 System BIOS Limitations at 8.4 GB
 ---------------------------------
 Many BIOSs do not properly support 8.4 GB and larger hard drives. We
 recommend using EZ-Drive 9.06W or later. EZ-Drive 9.06W or later
 supports extended INT 13 functions which allows the BIOS to access
 the full capacity of 8.4 GB and larger hard drives. EZ-Drive 9.06W
 can be downloaded from Western Digital's web site at
 www.westerdigital.com

 Some of the BIOS issues that may be encountered with 8.4 GB or larger
 hard drives are: 1. Reporting 0 Heads in INT 13 Function 8.

 Some BIOSs attempt to use translated geometry but incorrectly report
 0 heads in INT 13 Function 8 instead of 255 heads. If Fdisk is run on
 these systems, it initially appears to function normally. However, a
 corrupted partition is created which incorrectly reports the drive
 has 0 heads. DOS hangs, even when booted from a floppy, as soon as it
 detects this partition.

 To correct this issue:
 - Boot to a bootable non-DOS based floppy. EZ-Drive can be used for
   this purpose.

 - Boot to the EZ-Drive diskette and set up the drive using EZ-Drive.
   This repartitions and formats the drive correctly so that the
   system can boot properly.


 Failure to Translate or Reporting Much
 --------------------------------------
 Lower Capacities. Some BIOSs will not translate an 8.4 GB hard drive,
 or will report a capacity significantly less than 8.4 GB. In some
 cases, an 8.4 GB or larger drive causes INT 13 Function 8 to revert
 back to what appears to be a 528 MB or less limitation. The solution
 is to either obtain a BIOS upgrade if possible, or use EZ-Drive
 9.06W.


 Hang During Boot
 ----------------
 Some systems hang after power on when auto-detecting an 8.4 GB hard
 drive. This hang does not disappear until a less than 8.4 GB drive
 type is selected in CMOS, making it impossible to utilize the full
 capacity of the hard drive. The solution is to select a User Defined
 type that is less than 8.4 GB, and use EZ-Drive 9.06W to set up the
 hard drive.


 POST Error During Boot
 ----------------------
 In some systems with proprietary BIOSs you may encounter errors
 during POST or a failure to boot properly. If this happens it may be
 necessary to use the Alternate Jumper Settings shown below and set
 up the hard drive using EZ-Drive. The Alternate Jumper Settings are
 used to force the drive to report 4092 cylinders in Identify Drive
 word 1, but still report the true capacity in words 60 and 61. This
 allows EZ-Drive and the extended INT 13 functions to recognize
 the true capacity of the hard drive.


 240 Head BIOS Translation
 -------------------------
 Many BIOSs report a maximum of 240 heads in INT 13 Function 8, giving
 a limitation of 7.9 GB (1024x240x63). Some of these BIOSs still
 support extended INT 13 functions. Windows 95 and Windows 98, which
 utilize the extended INT 13 functions, recognize the full 8.4 GB or
 larger capacity. DOS 6.x and Windows 3.x are limited to 7.9 GB
 because they do not utilize the extended INT 13 functions.


 Operating System Limitations at 8.4 GB
 --------------------------------------
 1. DOS 6.x and Windows 3.x. These operating systems do not support
 extended INT 13 functions so they are dependent on the INT 13
 Function 8 BIOS limitation of the system.

 DOS is limited to a maximum of 1024 cylinders, 255 heads, and 63
 sectors per track (16,450,560 addressable sectors or 8423 MB).

 Therefore, the maximum values DOS can recognize in Identify Drive
 words 1, 3, and 6 are 16320x16x63 (8423 MB). DOS cannot utilize the
 full capacity of hard drives larger than 8.4 GB.


 Single Drive Alternate Jumper Settings
 --------------------------------------
 Dual (Master) Drive Alternate Jumper Settings Dual (Slave) Drive
 Alternate Jumper Settings


 Windows 95 & Windows 98
 -----------------------
 Windows 95 and Windows 98 support extended INT 13 functions, and
 therefore support 8.4 GB and larger hard drives. However, if the
 system BIOS does not support extended INT 13 functions, then Windows
 95 and Windows 98 are limited by the system BIOS's barrier and
 cannot support the full capacity of 8.4 GB and larger hard drives.

 To ensure that Windows 95 and Windows 98 recognize the full capacity
 of 8.4 GB and larger hard drives, the system BIOS must support
 extended INT 13 functions.


 Windows NT 4.0
 --------------
 Windows NT 4.0 recognizes the full capacity of hard drives up to the
 8.4 GB limit in Identify Drive words 1, 3, and 6. Service Pack 3 is
 required to recognize hard drives larger than 8.4 GB. Without Service
 Pack 3, hard drives larger than 8.4 GB are treated as the capacity
 shown in Identify Drive words 1, 3, and 6 regardless of what is
 reported in words 60 and 61 (8.4 GB max.).

 The first partition in Windows NT 4.0 is limited to 4 GB. During the
 initial setup, it appears that the full capacity of the hard drive
 is not recognized. After installing Windows NT, use the Disk
 Administrator utility that comes with Windows NT to create additional
 partitions to utilize the full capacity of the 8.4 GB hard drive.

 Windows NT 4.0 does not require extended INT 13 functions to
 recognize the full capacity of the hard drive. Windows NT operates
 the same regardless of whether the extended INT 13 functions are
 present.


 OS/2 Warp 4.0
 -------------
 As of the date of this document, OS/2 Warp cannot be installed
 properly with 8.4 GB and larger hard drives. IBM is currently
 working on a patch to correct this.


 Novell Netware 4.11
 -------------------
 Novell Netware 4.11 recognizes the full capacity of hard drives up to
 the 8.4 GB limit in Identify Drive words 1, 3, and 6. Since Novell
 does not check Identify Drive words 60 and 61, hard drives larger
 than 8.4 GB are treated as the capacity reported in words 1, 3, and 6
 (8.4 GB maximum).

 Novell Netware does not use extended INT 13 functions, so it cannot
 support larger than 8.4 GB hard drives.


 Conclusion
 ----------
 The limitations of your system BIOS and your operating system
 combined determine your overall system limitation. For example, if
 your operating system recognizes extended BIOS functions, but
 your system BIOS has a 2.1 GB hard drive barrier, you are limited to
 your system BIOS's 2.1 GB hard drive barrier. Conversely, if your
 operating system does not recognize extended BIOS functions, but
 your system BIOS supports 8.4 GB hard drives, you are limited to your
 operating system's capability. Your system limitation is based on the
 lowest functioning barrier.

 To utilize the full capacity of 8.4 GB and larger hard drives, your
 system BIOS and operating system must support extended INT 13
 functions. Since it is difficult to determine if your system
 BIOS supports 8.4 GB or larger hard drives, we recommend using
 EZ-Drive 9.06W or later. EZ-Drive 9.06W or later can determine
 whether or not your system BIOS properly supports the full capacity
 of your hard drive. If it does not, EZ-Drive installs EZ-BIOS on the
 boot sector of the hard drive to support the full capacity of your
 8.4 GB or larger hard drive. If your system BIOS supports your hard
 drive, EZ-Drive does not install EZ-BIOS.


