Technical data

60 RZ56 Storage Expansion Box
14. If a problem still exists, then check the internal SCSI cable’s connector
for damaged pins or cut wires. Check the external SCSI cable for
damaged connector pins or cut wires. If the cables appear normal,
then replace the MSC module in the system box.
6.4 BA42 Enclosure FRU Removal and
Replacement
To use this section, find the name of the FRU that needs replacing in
Table 6–1; then go to the section listed beside the FRU. Follow the steps
in the section to remove the FRU, and reverse the procedures to replace
the FRU.
CAUTION
Wear a static wrist strap and use a static mat when you replace a
FRU.
Table 6–1 BA42 Enclosure FRU Section Listings
FRU Section
Power supply 6.4.5
RZ56 disk drive and electronics module 6.4.1
SCSI ID switch module 6.4.4
BA42 Enclosure FRU Locations
The BA42 enclosure storage expansion box contains one or two RZ56
drives. Each drive consists of an RZ56 electronics module and an HDA
assembly. The expansion box also contains an SCSI ID switch module and
a power supply.