HSD10 Operation
4-8 VAX 4000 Model 108 User Information
1. At the system console prompt, enter the console command SHOW DEVICE to
determine the DSSI ID numbers currently active on the DSSI bus.
2. Select an unused DSSI ID number for the HSD10 DSSI-to-SCSI bus adapter.
3. Refer to Figure 4-1 and Table 4-3 to locate the DSSI ID switches on the device
configuration switchpack and determine how they are to be set.
4. Using a small blade screwdriver or similar tool, set the switches to the DSSI ID
number selected in Step 2. Note that the "Open" position is marked on the switch
body.
Selecting and Setting the SCSI ID
The SCSI port is connected by cable to the internal SCSI devices, and must have a unique
SCSI ID.
The HSD10 DSSI-to-SCSI bus adapter is factory set to SCSI ID = 7 to give the adapter the
highest priority on the SCSI bus. The other devices in the configuration must have SCSI
ID numbers between 0 and 6. For normal operation, you do not need to reset the SCSI ID.
Table 4-4 lists the sections of SW2 used for setting the SCSI ID and the corresponding
settings for each SCSI ID. On the switchpack, the closed position is with the switch in the
down position, and the open position is with the switch in the up position (toward the
"Open" marked on the switchpack).
Table 4-4 HSD10 SCSI ID Settings
SCSI ID
SW2-1
SW2-2
SW2-3
0
Open
Open
Open
1
Open
Closed
Closed
2
Open
Closed
Open
3
Open
Open
Closed
4
Closed
Open
Open
5
Closed
Open
Closed
6
Closed
Closed
Open
7 (Default)
Closed
Closed
Closed
Use the following procedure to set the SCSI ID, if required: