Service Procedures
Digital PRIORIS ZX Server
64
MCS Logistics Engineering - Nijmegen
SCSI Drive IDs
SCSI bus device addresses are automatically assigned in the hot-swap drive bay depending on the slot
number in which they are installed. The address jumper on the storage backplane is used to override the
default addresses. The default settings are listed in the following table and can be set manually to different
addresses at your option. The storage backplane can be configured as two separate SCSI buses or as a
single SCSI bus using a jumper cable.
Note that:
♦
The SCSI ID addressing is independent of the single or dual SCSI bus arrangement. Make sure to
select unique SCSI IDs for all SCSI devices on the SCSI bus.
♦
You must use a wide SCSI host adapter to set SCSI IDs greater than seven.
♦
The CD-ROM drive and tape IDs must be set manually. Refer to the manufacturer’s documentation
for information on setting drive Ids.
NOTE
Narrow SCSI devices can be added to a wide SCSI bus, however, because of the ID
settings, narrow devices take up two IDs selections on a wide bus.
Single/Dual SCSI Bus Target ID Settings
SCSI Bus 1
Jumpers Set
None
W1
W2
W3
W1+W2
W1+W3 W2+W3
W1+W2+W3
SBB slot0 ID=
SBB slot1 ID=
SBB slot2 ID=
SBB slot3
ID=
0
1
2
3
0
1
2
3
8
9
10
11
0
1
2
3
8
9
10
11
0
1
2
3
8
9
10
11
8
9
10
11
SCSI Bus 2 or Jumper Cable
Jumpers Set
None
W1
W2
W3
W1+W2
W1+W3 W2+W3
W1+W2+W3
SBB slot4 ID=
SBB slot5 ID=
SBB slot6
ID=
0
1
2
4
5
6
0
1
2
8
9
10
4
5
6
12
13
14
8
9
10
12
13
14
