Technical data

RZ56 Storage Expansion Box 57
(Figure 6-3) shows how the BA42 storage expansion box connects to the
system box.
TO
SYSTEM
BOX
MA-X0960-89
SCSI
TERMINATOR
Figure 6–3 BA42 Enclosure Daisy-Chained
6.3 Troubleshooting the BA42 Enclosure
To troubleshoot the RZ56 disk in the BA42 storage expansion box, use the
self-test and system exerciser diagnostics in the system box.
Self-Test Results
The following table lists the normal self-test results for the RZ56 disk
drive. Any code other than those listed indicates either an error with
the drive, a cabling problem, or an error with the SCSI bus controller on
the MSC module. An additional RZ56 drive storage expansion box can
be installed at address ID 1, 2, or 3 if no internal drives connect to these
SCSI address IDs on the external SCSI bus.