Digital Equipment VAXstation 3100 Maintenance Manual page 63

42 Troubleshooting
Table 2-13 Model 40 SCSI Bus Addre99 ID Assignments
SCSI-A Bus
RZ23 disk drive (system disk)
TZ30 tape drive
SCSI bus controller
Reserved for expansion
SCSI-B Bus
RRD40 compact disc drive (internal or external)
RZ23 disk drive
RZ23
disk drive (additional drive on SCSI-B bus)
~5 disk drive expansion box
RZ55 disk drive
~P!W~O_!!
box Jsecond box)
SCSI bus controller
TK.50Z expansion box
Reser;ed
for
expa.-ision
Address ID
3
5
6
7
4
3
2
l
0
6
5
7
If
you do not know which device is installed at what
SCSI
address
ID
or
whether the device is on the
SCSI-A
or
SCSI-B
bus, enter
SHOW DEVICE
at the console prompt >>>. The SHOW DEVICE command displays aU
devices connected to the
MSC module's
bus controllers. This display lists the
SCSI
address
ID
of all devices on
SCSI
buses. Figure
2-9
shows
an
example
of this command.