Installation guide

Diagnostics and Utilities 9-15
Check the output from the show device command against the physical
SBBs in the SCSI PIU. There should be a one-to-one correspondence be-
tween SBBs reporting to the console and physical devices mounted in the
PIU. Note that the node number reported by the console corresponds to
the physical position of an SBB within a shelf; the slots and nodes are
numbered 0 to 6, from top to bottom (see Figure 9-4).
Each SBB has two LEDs. The green LED on the left lights when the SBB
is mounted and being accessed.
Table 9-2 SCSI SBB LED Functions
If you encounter any problems, reseat the SBBs and reissue show device.
If you need further testing, use the test command. Refer to BA350 docu-
mentation if you need to reconfigure the buses.
SBB LED Condition Green LED Yellow LED
Disk or tape
Off No activity Normal
Flashing Activity Spinning up or down
On Activity Not used
Power supply
Off Shelf fault Power fault
On Shelf okay Power okay
For more information:
Console Reference Manual
Advanced Troubleshooting
BA350 DECstor/me Modular Storage Shelf Subsys-
tem Configuration Guide or User’s Guide