Digital Equipment EK-SFXXS-SG-003, Service Manual

Page: 50 / 224

3–6 Troubleshooting
3.2.2 Troubleshooting the Storage Enclosure
Use this section only after you have determined that the problem or fault
is not in the adapter modules or tape magazine tapes, or the DECarray
(power controller and configuration).
3.2.2.1 Introduction
The storage enclosure consists of several major components:
• Disk ISEs
• Power supply
• Operator control panel (OCP)
• Cooling fan
• Transition-termination module (TTM) for SF7x series
• Transition module (TM) for SF3x series
• Interconnect cables for power, control signals, and DSSI bus signals
The troubleshooting procedure for the storage enclosure follows the above
order as the FRUs go from the easiest to repair and replace (the disk ISE)
to the more difficult (internal interconnecting cables).
3.2.2.2 Configuration Verification
Use the following steps to verify that the storage enclosure has been
configured according to the DECarray Installation Guide .
1. Are the storage enclosures in the correct bus mode for single-system,
stripe set or DSSI VAXcluster configurations?
2. Are the DSSI ID numbers set correctly?
3. Are there any Fault LEDs lit?
If the above steps reveal that the DECarray, magazine tape ISEs, and
storage enclosures were not configured correctly, then reconfigure the
DECarray. (Refer to the DECarray Installation Guide ). Reboot the
system or systems, and run the EVCXF configuration program (Refer to
the
KFMSA Module Installation and Owner’s Manual
).
Check for symptoms that indicate a problem.
If the problems persist, consult Table 3–3. Isolate the symptom, find the
probable cause, and follow the corrective action and reference called for in
Table 3–3.