Identifying Interface Problems - HP Surestore Disk Array 12h - And FC60 Service Manual

Identifying Interface Problems

Types of Interface Problems
Interface problems include any malfunctions that delay, interrupt, or prevent successful
input/output (I/O) activity between the hosts and other devices. This includes
transmissions between the controller enclosure and disk enclosures attached to it. For the
purpose of this discussion, the controller enclosure's interface components include the
following:
•
Internal components
– Two Fibre Channel controller modules
– Controller enclosure card cage (includes midplane w/SCSI connectors)
•
External components:
– Fibre Channel host adapters, cables, and hub or switching devices
– SCSI cables, terminators, BCC modules in the disk enclosure
Interface problems can be caused by either software or hardware.
•
Software problems, which indicate operating system or disk array application errors,
typically involve one or more of the following:
– Host operating system software error
– Disk array or other application error
– Incorrect configuration settings
•
Hardware problems, which indicate defective equipment, include the following:
– Loose, disconnected, or damaged interface cables or connectors
– Improper SCSI termination on disk enclosure bus or defective terminators
– Improper interface ID settings (hardware switches)
– Failed controller modules, memory modules, or controller enclosure midplane
– Failed disk modules, host adapter boards, or other devices on the Fibre Channel
network
– Failed disk modules
Controller Enclosure Troubleshooting
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