DEC MicroVAX 3100 Owner's Manual page 123

Each device has a set of switches or jumpers that can be set for a specific ID.
The TK50Z tape drive, the RZ55 hard disk drive, and the RRD40 compact
disc drive are mounted in expansion boxes. Each of these devices have
external switches which you can set.
The integral RZ23 hard disk, the TZ30 tape drive and the RX23 diskette
drive have internal switches or jumpers. These must be reset by your
DIGITAL service representative if you need to change their default settings.
B.2 Setting the SCSI 10
Enter the TEST 50 command at the console prompt
(»»,
then press
RETURN. Your system configuration is displayed on the screen.
Note that FFFFFF05 identifies an open ID. See Table 4-2 for a complete
list of the device status codes and their meaning. The system given in the
example contains a controller, two RZ23 hard disks, one RRD40 compact
disc drive expansion box and one TK50Z tape drive expansion box on the
external SCSI-B bus. This leaves three open IDs. Of these, ID 7 is reserved
for a device requiring the highest priority on the SCSI bus.
SCSI-B lClC.OOOl Vl.3
00000001 FFFFFF05 00000001 00000001 05000001 01000000 FFFFFF03 FFFFFF05
• • • • " • • 6)
•
SCSI ID 0 - RX23
•
SCSI ID 1
~
open
•
SCSI ID 2 - RZ23
•
SCSI ID 3 - RZ23
" SCSI ID 4 - RRD40
•
SCSI ID 5 - TK50Z tape drive
•
SCSI ID 6 - SCSI-B controller
6)
SCSI ID 7 - Reserved
Follow these rules when you set SCSI IDs:
• You can have up to seven devices on one bus.
• Each device must have its own unique identifier.
8-2
MicroVAX 3100 and VAXserver 3100 Owner's Manual