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Hard Drive: WESTERN DIGITAL: WD 93044 A 43MB 3.5"/HH IDE / AT




W D   9 3 0 4 4   A    WESTERN DIGITAL
NO MORE PRODUCED                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 3.5"/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             8 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                                  

Layout

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

Jumpers

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

Install

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.

Features

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.















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