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1991-05-17
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Western Digital is a registered trademark of Western Digital
Corporation; IBM PC, AT and XT are registered trademarks of the
International Business Machines Corporation; MS DOS, OS2 and PC DOS
and Xenix are registered trademarks of Microsoft Corporation.
Speedstor is a registered trademark of Storage Dimensions; Disk
Manager is a registered trademark of Ontrack Computer Corporation.
SCO is a registered trademark of The Santa Crux Operation.
WD1006S-WAH
User Guide
The WD1006S-WAH controller is designed to interface with up to two
Winchester ST506/ST412 hard disk drives in an IBM PC AT or compatible
system and will support drives with up to 16 read/write heads and
2048 cylinders. Each drive may be a different configuration. The
advanced design of the WD1006S-WAH implements the controllers most
significant feature, 1:1 interleave.
The WD1006S-WAH has the same integrated circuit set and operates
identically as the WD1006-WAH. The primary difference between the
two controllers is size. The WD1006S-WAH occupies a half slot in the
host system because surface mount technology (SMT) reduced the
physical dimensions to 6.10 inches x 3.90 inches. The WD1006-WAH
occupies a full slot.
There is only one version of the WD1006S-WAH available. Feature 001
(F001) offers cacheing firmware, NO wait state generator.
Installation of the controller requires three steps: 1) verifying
jumper settings; 2) installing into the host computer; 3) formatting
the hard disk drives. To complete installation, you will need the
following:
Two hard disk cables (3 if using 2 hard disk drives); Winchester hard
disk drive; screwdriver; MSDOS Version 2.0 or later; IBM Advanced
Diagnostic diskette (or similar program for IBM compatibles); FDISK
and Format utility (normally included with MSDOS).
Preparation of Controller
WARNING
HANDLE THE CONTROLLER BY THE ENDS OF THE BOARD
SOME OF THE CHIPS ARE STATIC SENSITIVE AND DAMAGE
MAY OCCUR IF THE BOARD IS INCORRECTLY HANDLED
Before you can install your WD1006S-WAH, you will need to be certain
that the jumpers (small shorting plugs) are correctly set. Refer to
Table 1 for correct jumper settings. Modification of factory jumper
settings is rarely necessary. Modify jumpers only under the
direction of a qualified individual; i.e. your dealer.
┌─────────────Drive 2─Drive 1─Control────────┐
│ J1───┐ ┌───J2──┐ ┌─J3─┐ ┌───J4───┐ │
│ └───┘ └───────┘ └────┘ └────────┘ │
│ U3─┐ U4┐ │
│ └─┘ └─┘ │
│ ∙∙W1 │
│ │
│ U6─┐ │
│ └─┘ │
│ ∙∙∙W2 W5 W6 W4 │
│ ∙W3 ∙∙∙ ∙∙ ∙∙ │
└─┐ WD1006S-WAH ┌─┐ ∙ ┌───┘
└┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘ └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘
Table 1
Jumper Position Function
W1 1-2 Standard: Etch on the solder side
connects pins 1 and 2. Drive LED is not
latched; i.e. LED lights for drive selec-
tion. REMOVE W6 IF W1 IS INSTALLED.
No Jumper Drive LED is latched.
W2 1-2 Standard: Uses header connector. No etch
between pins 1 and 2. Supports 16 heads. No
REDUCED WRITE CURRENT (RWC).
2-3 Supports 8 heads and RWC.
W3 No Jumper Standard: Enables cacheing.
1-2 Disables cacheing. Must install jumper
to disable cacheing.
W4 No Jumper Isolates mounting bracket from board logic
ground.
1-2 Connects mounting bracket to board logic
ground.
W5 1-2 Standard: Selects primary ports. Etch on
solder side connects pins 1 and 2.
2-3 Selects secondary ports. Requires cutting
etch between pins 1 and 2 and installing
a jumper. NOTE: MOST HOST SYSTEM BIOS
DEVICE DRIVERS SUPPORT PRIMARY PORTS ONLY.
W6 No Jumper Standard: Non-latched mode.
1-2 Latched mode. Jumper must be installed to
change factory setting.
Hardware Installation
WARNING
MAKE SURE COMPUTER IS TURNED OFF
AND POWER IS DISCONNECTED
1. Verify that your host computer has a 135 watt power supply. If
the disk drive(s) is(are) being installed internally, it is best to
locate the controller in the nearest available expansion slot to the
drive.
2. Remove the blank expansion slot bracket. Put the bracket away
and save it for possible future use. The screw will be used to hold
the new controller in place.
3. The terminating resistor must be present only on the last hard
disk drive connected. If there are two drives, the terminating
resistor must be present on the second drive. Verify proper setting
of drive select switches for drive select 1 or 2. Refer to your
system owner's manual for information about proper drive termination
and select switches. DO NOT USE THE RADIAL SELECT OPTION.
4. Attach 34-pin control connector to J4 on the controller board.
Make sure that Pin 1 of the cable connector goes to Pin 1 on the
controller board. Pin 1 of the cable connector is typically located
on the color coded side of the cable.
5. Connect control cable to drive.
6. Attach 20-pin data connector to J3 (Drive C or 0).
7. Attach 20-pin data connector to J2 (Drive D or 1).
8. Connect data cables to drives.
9. Attach Winchester activity LED connector to J1. J1 is a
reversible connector.
10. Install controller board into the expansion slot. Make sure that
the board is seated properly by pressing down on both ends of the
board. Secure the board with the bracket screw.
CAUTION
WHEN ROUTING CABLES, BE CAREFUL NOT TO PINCH
THEM. CABLES MUST NOT GET CAUGHT BETWEEN THE
COVER AND THE BOARDS, NOR SHOULD THEY OBSTRUCT
ANY AIR FLOW PATH FROM FANS OR VENTS.