IBM PS/2 90 XP 486 Hardware Maintenance Reference page 40

3.3.3 Setting the SCSI ID
SCSI devices have either switches or jumpers to set the SCSI ID.
hard disk drives are shipped preset to SCSI ID 6.
used and the location of the jumpers or switches varies from device to
device.
To set the SCSI ID on a device that has switches, do the following:
Refer to the switches in the figure below.
Refer to the table to determine how the switches should be set for the
SCSI ID you selected.
Using a ballpoint pen, set switches 1, 2, and 3 to correspond to the
SCSI ID you selected.
Switch 4 is always set to "on."
The table below shows how switches 1, 2, and 3 are set for IDs 6 through
0.
Notes:
1. If present, switch five is always on, and switch six is always off.
2. On external SCSI devices that have a rotary switch to set the SCSI ID,
set the switches or jumpers on the FRU device inside the external
cover to zero (off) to enable the rotary switch.
To set the SCSI ID on a device that has jumpers, do the following:
Refer to the pins In the figure below.
Refer to the table to determine where the jumpers should be plugged to
set the SCSI ID you chose.
Move the jumpers to correspond to the SCSI ID you selected.
The table below shows how the jumpers are positioned for IDs 6 through 0.
+------------------------------------------------------------------------+
¦ SCSI ¦ Jumpers
¦ ID ¦ 1 2
+-------------+--------------+--------------+--------------+-------------¦
¦ 6 ¦ : ¦
+-------------+--------------+--------------+--------------+-------------¦
¦ 5 ¦ ¦ :
+-------------+--------------+--------------+--------------+-------------¦
¦ 4 ¦ : :
+-------------+--------------+--------------+--------------+-------------¦
¦ 3 ¦ ¦ ¦
+-------------+--------------+--------------+--------------+-------------¦
¦ Value ¦ 1 2
+------------------------------------------------------------------------+
IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR
Setting the SCSI ID
PICTURE 5
PICTURE 6
PICTURE 7
¦ ¦ SCSI
3 ¦ ¦
¦ ¦ ¦
¦ ¦ ¦
¦ ¦ ¦
: ¦ ¦
4 ¦ ¦
¦ Copyright IBM Corp. 1990, 1992
3.3.3 - 1
All FRU
The type of hardware
¦ Jumpers
ID ¦ 1 2 3 ¦
2 ¦ : ¦ :
1 ¦ ¦ : :
0 ¦ : : :
¦
¦ 1 2 4
¦
¦
¦
¦
¦
¦