HP Surestore Disk Array 12h - And FC60 Service Manual page 237

Hints for Troubleshooting Interface Problems
The first step in troubleshooting interface problems is determining whether the problem is
caused by hardware or software. The following information should aid in making this
determination:
•
If the problem occurred during or immediately following a software activity, try to undo
whatever the software did, then step through each software function (in smaller
increments) until the problem occurs again. This will identify the function that is
working incorrectly.
•
If the problem occurred without an apparent software-related activity, check the
operating system and storage management software for error messages and associated
procedures. This may help determine if it is a software or hardware problem.
•
Check the controller modules for faults.
•
Check all the interface cables, particularly the host Fibre Channel cables, to make sure
that they are securely connected and undamaged.
•
If you moved the controller enclosure to another host or attached new devices to it,
check the following:
– Loop ID settings for both controller modules. Make sure these settings are
unique and do not conflict with other devices. Change the settings if necessary.
– SCSI ID settings on all attached disk enclosure BCC modules. Change the
settings as necessary. Make sure all switch settings are set the same for both BCCs
in each disk enclosure.
– Interface cable connections. Make sure that all cables are routed correctly.
Change the cable connections as necessary. For cable connection information for
other devices, refer to applicable hardware manuals. Make sure that the Split/Full
bus switch is set on the disk enclosure for the desired configuration.
Problems resulting from a defective host adapter board, controller module, memory
module, or controller enclosure midplane may be difficult to detect. If checking all the
items listed above does not identify the problem, try:
•
Replacing the host adapter and appropriate interface cable to each host.
Controller Enclosure Troubleshooting
237