
W D   9 5 0 4 4   A    WESTERN DIGITAL
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/HH              Cylinders     782|  977|     |
Capacity form/unform    43/      MB        Heads           4|    5|     |
Seek time   / track  28.0/     ms          Sector/track   27|   17|     |
Controller           IDE / AT              Precompensation 65535
Cache/Buffer               KB              Landing Zone      862
Data transfer rate    0.938 MB/S int       Bytes/Sector      512
                      4.000 MB/S ext
Recording method     RLL 2/7                        operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C         5 50    |    -40 60
Power: sleep              W     Humidity     %         8 80    |      5 95
       standby            W     Altitude    km    -0.457  2.973| -0.457 12.200
       idle           7.4 W     Shock        g         5       |     40
       seek               W     Rotation   RPM      3600
       read/write     9.3 W     Acoustic   dBA        40
       spin-up            W     ECC        Bit
                                MTBF         h      40000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

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                        L   A   Y   O   U   T
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WESTERN  WD93024/93044/95024/95044-A  INSTALLATION GUIDE WD0052S 11/89

  +---------------------------------------------------------+
  |                                                         |XX I
  |                                                         |XX N
  |                                                         |XX T
  |                                                         |XX E
  |                                                         |XX R
  |                                                         |*X F  J2
  |                                                         |XX A
  |                                                         |XX C
  |                                                         |XX E
  |                                                         |XX
  |                                                         |XX1
  |                                                         |6-5 J8
  |                                                         || |
  ++LED                                                     |2-1
  ++                                                        |XX J1
  |                                                         |XX Power
  +---------------------------------------------------------+







                         J2                    J8     J1
    +39------------------------------------1++5-3-1++-------+
    |o o o o o o o o o o o o o o o o o o o o||o o o||O O O O|
    |o o o o o o o o o o   o o o o o o o o o||o o o||1 2 3 4|
  --+40------------------------------------2++6-4-2+++-+-+-++----
                                                     | | |  +5V
                   (Pin 20 keyed)                    | | +- GND
                                                     | +--- GND
                                                     +----- +12V



 Adapter Card
 ------------        WDAT-140
 +------------------------------------------------------------+
 |       XXXXXXXXXXXXXXXX J2 HARD                             |
 |      1                 (40 pin)                            |
 |        +-+W1                                               |
 |        1-3                                                 |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 ++                   +-+                          +----------+
  +++++++++----------++ +++++++++++-----+-++++++++++
          P2                      P1







 Adapter Card
 ------------        WDAT-240
 +------------------------------------------------------------+
 |       XXXXXXXXXXXXXXXX J5 HARD  XXXXXXXXXX J1 FLOPPY       |
 |       1                (40 pin) 1          (34 pin)        |
 |        +-+W1  +-+W2             ++W3                       |
 |        1-3    1-3              1++2                        |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                            |
 |                                                    ++W4    |
 |                                                   1++2     |
 ++                   +-+                          +----------+
  +++++++++----------++ +++++++++++-----+-++++++++++
          P2                      P1






 Adapter Card
 ------------        WDAT-440
 +----------------------------------------------------------------+
 |       XXXXXXXXXXXXXXXX J5 HARD  XXXXXXXXXX J1(34p) XXXXX J8(9p)|
 |LED   1                 (40 pin) 1   FLOPPY         1 SERIAL    |
 |XXJ6      +-+W3                            ++W5                 |XX
 |XX(4p)    1-3                             1++2           J7 (9p)|XX
 |1                                                        SERIAL |XX
 |                                                                |
 |                                                        J2 (25p)|XX
 |  +-+                                                   PARALLEL|XX
 |  | |W8       +-+W4                                             |XX
 |  | |         1-3                                               |XX
 |  | |              +-+W9       2+--------+W7                    |XX
 |  | |              1-3         1+--------+          ++W6        |XX
 |  2-1                                              1++2         |
 ++                   +-+                          +--------------+
  +++++++++----------++ +++++++++++-----+-++++++++++
          P2                      P1



**********************************************************************
                      J   U   M   P   E   R   S
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WESTERN  WD93024/93044/95024/95044-A  INSTALLATION GUIDE WD0052S 11/89

 Jumper Setting
 ==============

 Single and Dual (Master/Slave) Installations
 --------------------------------------------
 The installation procedures describe a single or dual installation.
 An intelligent drive is compatible with other intelligent drives that
 support a master/slave configuration. ST-506 hard drives using a
 standard AT controller are NOT compatible.

 If you are installing an intelligent drive and a WDAT adapter board
 in am IBM PC AT that currently has an original Conner CP342 or CP3022
 drive, you will discover that these drives are incompatible. Only one
 drive can be functional, depending upon the jumper configuration of
 the WDAT adapter board. This restriction does not apply to AT
 compatible systems.


 J8  Master/Slave Configuration
 ------------------------------
 Verify that the jumper shunts on the drive's J8 jumper block are
 properly installed to match your configuration choices.

 Single installation:

    Only
   +5-3-1+ If this is your first and ONLY intelligent drive in your
   |o o o| system their should NO JUMPERS installed on J8.
   |o o o|
   +6-4-2+


 Dual installation:

   Master      Slave
   +5-3-1+     +5-3-1+ if you are installing two intelligent drives
   |X o o|     |o X o| you must designate one of them as the
   |X o o|     |o X o| primary or "master" and the other as the
   +6-4-2+     +6-4-2+ secondary or "slave". Jumper your Western
                       Digital intelligent drive accordingly: A
                       jumper on pins 3-4 designates an intelligent
                       drive as a slave; a jumper on pins 5-6
                       designates an intelligent drive as a master.


 Installation with a pre-existing Conner CP342 or CP3022 drive:

   +5-3-1+ Configure the Western Digital drive as the slave. Install
   |o X X| jumpers on the drive's J8 jumper block as shown. The Conner
   |o X X| drive should be configured as the master. This configura-
   +6-4-2+ tion presumes that you will use the LED indicator on your
           WD93024-A or WD93044-A. However, if the host system
           requires a front panel LED, then configure the WD93024-A/
           44-A as the master and the Conner drive as the slave.

 --------------------------------------------------------------------

 WDAT-140 Adapter Board
 ======================
 Provided one hard drive interface

 The WDAT-140 board contains one jumper block, W1. When pins 3 and 4
 are connected, the DIRQ14 signal is passed directly to the host
 computer. Do not change thos setting. This is the correct setting for
 any intelligent drive except an original Conner CP342 or CP3022 in an
 IBM AT.

 You cannot use this adapter board with a pre-existing Conner drive
 and a Western Digital drive under certain special conditions. If you
 have an IBM AT and an original Conner CP342 or CP3022, your Conner
 drive will not function with another intelligent drive in the same AT
 system. Only one drive will be functional, depending on the W1 jumper
 configuration. This particular restriction DOES NOT APPLY to AT
 compatibles.

 If you have a pre-existing Conner CP342 or CP3022 in an AT compatible
 system, configure it as the master drive and leave the jumper shunt
 on pins 3-4 of W1. Configure the Western Digital drive as the slave.


 WDAT-240 Adapter Board
 ======================
 Provides one hard drive interface and one floppy drive controller

 x = Factory default jumper setting


 The WDAT-240 board has four jumper blocks, W1 to W4. Adding or re-
 moving a jumper shunt at any of these locations, defines a hardware
 configuration. The default jumper settings are illustrated below.
 These settings are suitable for most system configurations. Do not
 change any of these settings until you have read the jumper informa-
 tion which follows.

 +---+W1
 |o X|   DIRQ14 passed directly to host bus
 |o X|
 +1-3+

 +---+W2
 |X o|   Floppy controller enabled
 |X o|   Floppy primary address is 3F0-3F7
 +1-3+

 +---+W3
 |o o|   Single speed floppy drive. (Dual speed floppy drive is
 +1-2+   selected, if this jumper block is installed and jumpered.)

 +---+W4
 |o o|   Logic ground is not connected to chassis. (Logic ground is
 +1-2+   connected to chassis if this jumper block is installed and
         jumpered.)


 W1 Jumper
 ---------
 When pins 3 and 4 are connected, the DIRQ14 signal is passed directly
 to the host computer. DO NOT CHANGE THIS SETTING. This is the correct
 setting for any intelligent drive except an original Conner CP342 or
 CP3022 in an IBM AT.

 You cannot use this adapter card with a pre-existing Conner drive and
 a Western Digital drive under certain special conditions. If you have
 an IBM AT and an original Conner CP342 or CP3022, your Conner drive
 will not function with another intelligent drive in the same AT
 system. Only one drive will be functional, depending on the W1 jumper
 configuration. This particular restriction DOES NOT APPLY to AT
 compatibles.


 W2 Jumper
 ---------
 Pins     Status     Function
 1-2    x CLOSED     Floppy controller enabled
 3-4    x OPEN       Floppy primary address 3F0-3F7

 1-2      CLOSED     Floppy controller enabled
 3-4      CLOSED     Floppy secondary address 370-377

 1-2      OPEN       Floppy controller disabled at primary address
 3-4      CLOSED

 Note: Invalid condition = no jumper installed


 W3 Jumper
 ---------
 Pins     Status     Function
 1-2      CLOSED     2-speed drive (300 & 360 rpm)

 1-2    x OPEN       Single-speed drive*

 Note: Most floppy drives are single-speed


 W4 Jumper
 ---------
 Pins     Status     Function
 1-2      CLOSED     Logic ground connected to chassis

 1-2    x OPEN       Logic ground independent of chassis


 WDAT-440 Adapter Board
 ======================
 Provides one hard drive interface, one floppy controller, two serials
 ports, and one parallel port

 x = Factory default jumper setting


 The WDAT-440 board has seven jumper blocks, W3 to W9. Adding or re-
 moving a jumper shunt at any of these locations, defines a hardware
 configuration. The default jumper settings are illustrated below.
 These settings are suitable for most system configurations. Do not
 change any of these settings until you have read the jumper informa-
 tions as follows.


 +---+W3
 |o X|   DIRQ14 passed directly to host bus
 |o X|
 +1-3+

 +---+W4
 |X o|   Floppy controller enabled
 |X o|   Floppy primary address is 3F0-3F7
 +1-3+

 +---+W5
 |o o|   Single speed floppy drive.
 +1-2+

 +---+W6
 |o o|   Logic ground is not connected to chassis.
 +1-2+

 +-------+W7
 2o X X X|  COM1 Interrupt = IRQ4
 1o X X X|  COM2 Interrupt = IRQ3
 +-------+  Parallel printer interrupt = IRQ7


 +---+W8
 |o o|  Internal serial port = COM2 (2F8-2FF)
 |xxx|  External serial port = COM1 (3F8-3FF)
 |o o|  Printer address, LPT1 = 378-37F
 |xxx|  Printer enabled
 |o o|
 |xxx|
 +2-1+


 +---+W9
 |X X|  Hard disk drive enabled
 |X X|
 +---+

 W3 Jumper
 ---------
 When pins 3 and 4 are connected, the DIRQ14 signal is passed directly
 to the host computer. DO NOT CHANGE THIS SETTING. This is the correct
 setting for any intelligent drive except an original Conner CP342 or
 CP3022 in an IBM AT.

 You cannot use this adapter board with a pre-existing Conner drive
 and a Western Digital drive under certain special conditions. If you
 have an IBM AT and an original Conner CP342 or CP3022, your Conner
 drive will not function with another intelligent drive in the same AT
 system. Only one drive will be functional, depending on the W3 jumper
 configuration. This particular restriction does not apply to AT
 compatibles.

 If you have a pre-existing Conner CP342 or CP3022 in an AT compatible
 system, configure it as the master drive and leave the jumper shunt
 on pins 3-4 of W3. Configure the Western Digital drive as the slave.


 W4 Jumper
 ---------
 Pins     Status     Function
 1-2    x CLOSED     Floppy controller enabled
 3-4    x OPEN       Floppy primary address 3F0-3F7

 1-2      OPEN       Floppy controller enabled
 3-4      CLOSED     Floppy secondary address 370-377

 Note: Invalid condition = no jumper installed


 W5 Jumper
 ---------
 Pins     Status     Function
 1-2      CLOSED     2-speed drive

 1-2    x OPEN       Single speed drive*

 *Note: Most floppy drives are single speed.


 W6 Jumper
 ---------
 Pins     Status     Function
 1-2      CLOSED     Logic ground connected to chassis

 1-2    x OPEN       Logic ground independent of chassis


 W7 Jumper
 ---------
 Pins     Status     Function
 1-2      CLOSED     PRN INT  = IRQ5
 3-4    x CLOSED     PRN INT  = IRQ7
 5-6    x CLOSED     COM2 INT = IRQ3
 5-7      CLOSED     COM2 INT = IRQ4
 6-8      CLOSED     COM1 INT = IRQ3
 7-8    x CLOSED     COM1 INT = IRQ4


 W8 Jumper
 ---------
  Pins     Status     Function
  1-2    x CLOSED     PRN enable
  1-2      OPEN       PRN disable
  3-4    x OPEN       PRN address, LPT1 = 378-37F
  3-4      CLOSED     PRN address, LPT2 = 278-27F
  5-6    x CLOSED     Ext COM = COM1 (3F8-3FF)
  7-8      CLOSED     Ext COM = COM3 (3E8-3EF)
  9-10   x CLOSED     Int COM = COM2 (2F8-2FF)
 11-12     CLOSED     Int COM = COM4 (2E8-2EF)


 W9 Jumper
 ---------
 Pins        Status     Function
 1-2         OPEN       Disable intelligent drive interface
 1-2 & 3-4 x CLOSED     Enable intelligent drive interface



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                      I   N   S   T   A   L   L
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WESTERN  WD93024/93044/95024/95044-A  INSTALLATION GUIDE WD0052S 11/89

 Notes on Installation
 =====================

 Drive mounting
 --------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x

 Mounting
 --------
 Mount the drive to the chassis using four 6-32 (3/16 inch) screws,
 or attach slide rails and mount.

 If your drive installation requires the use of slide rails or other
 mounting device, your computer manufacturer or dealer will provide
 these. Typically, 5.25-inch drives use slide rails.

 After securely mounting the drive, verify that nothing interferes
 with the free movement of the shock mounts.

 WARNING: The only electrical ground contact should be from the mount-
 ing bracket to the frame on the host system. Do not ground to the
 casting of the intelligent drive. Screws which are too long will
 cause a ground loop to the drive and defeat the shock mounting or
 possibly damage board components. The screw should engage no more
 than six threads (3/16 inch).

 Bezel (face plate) and LED indicator options are available. Contact
 your Western Digital dealer for the part number required for your
 configuration.


 System Requirements
 -------------------
 You can use your intelligent drive in an IMB PC/AT or compatible
 system that has Disk Operating System (DOS) versions 3.0 or later.
 Contact your Western Digital dealer if you need information about
 other operating systems.

 If there is not a compatible 40-pin connector on the motherboard for
 interfacing with Western Digital's intelligent drive, you require
 an adapter card such as those available from Western Digital. The
 hard drive interface and the floppy controller on these boards each
 support two daisy chained peripherals. Other system considerations
 will influence your choice of adapter card. Determine whether you
 require a floppy controller or serial/parallel ports.

 Make certain your system provides an adequate method of supplying
 power to your drive. Dual installations may require a Y-adapter
 if your system only provides one power connector.

 Western Digital's intelligent drive is compatible with other
 intelligent drives that support a master/slave configuration.
 (Master/slave configurations require one drive to be configured as
 the primary drive and the other drive to be configured as the
 secondary drive.) ST-506 hard drives using a standard AT controller
 are not compatible.

 Screwdriver and four 6-32 screws (3/16 inch) for mounting to the
 chassis or slide rails, if required. Slide rails are provided by your
 computer manufacturer or dealer.


 40-pin interface cable
 ----------------------
 Pin 20 position should be keyed (small plug placed in female
 connector) at both ends of the cable to prevent accidental reversal
 of the cable and thus damage to the drive. The cable must be of the
 "untwisted" type and not more than 12 inches long. If your installa-
 tion requires a longer cable, you may use a maximum cable length of
 18 inches, provided that you split the cable at pins 31/32 along the
 entire length of the cable. This minimizes the introduction of noise
 from the host system into the I/O channel. Noise may cause erratic
 operation of the host system. A daisy-chain cable is required for
 dual installations.


 Cabling
 -------
 Connect the host interface cable to the drive's J2 connector and
 thread the cable through the front panel slot.

 Warning: Damage to the intelligent drive may occur if the interface
 cable is attached incorrectly. To prevent an incorrect connection,
 make certain you are using an interface cable which has been keyed at
 both the drive and the host ends.


 Park Utility
 ------------
 At the end of each computer session you should park the drive heads.
 Parking the heads moves the heads to safe, non-data landing zone.
 This helps protect the media and the heads from accidental damage due
 to vibration, moving or shipping. If your operating system does not
 provide a park routine, Western Digital offers a park utility called
 PARKIDE.



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                      F   E   A   T   U   R   E  S
**********************************************************************
WESTERN  WD93024/93044/95024/95044-A  INSTALLATION GUIDE WD0052S 11/89

 Product Description
 -------------------
 Western Digital's intelligent drives, WD93024-A and WD93044-A, have
 an average seek time of 28 milliseconds and operate in high speed,
 AT-compatible systems (80286, 80386SX, and 80386). They are fully
 compatible with the AT Task File and maintain a 1:1 interleave on
 large multi-block transfers. Your intelligent drive is preformatted
 (low-level) and defect free. A translation feature provides
 support for logical drive types in systems that do not recognize 27
 sectors per track. The WD93024-A and WD93044-A support dual (master/
 slave) configurations of intelligent drives.

 Models WD93024-A, and WD93044-A offer 20 and 40 megabytes of storage,
 respectively, in a 3.5-inch form factor. These intelligent drives are
 also available in 5.25-inch frames (WD95024-A and WD95044-A).



 Selecting Drive Tables
 ----------------------
 Your system's BIOS contains standard drive tables. While the first 15
 drive type tables are fairly standard for most computer brands, para-
 meter tables for other drive types vary from one computer
 manufacturer to another. To ensure the optimal performance of your
 intelligent drive, select a drive table whose parameters most closely
 match those of your Western Digital drive.


 Formatting
 ----------
 You do not need to perform a low-level format. Western Digital's
 intelligent drive has already been preformatted at the factory.
 However, if you ever find it necessary to perform the low-level
 format again, contact your Western Digital dealer. Western Digital
 offers a format utility, ISPFMT, which allows you to perform a low-
 level format on Western Digital's intelligent drive. Do not use any
 other low-level formatting utility.


