Owners Manual

Table 27. Event descriptions and recommended actions (continued)
Number Severity Description/Recommended actions
● No action is required.
493 Info. A volume group was modified.
Recommended actions:
● No action is required.
494 Info. Reinitialization of a snap pool completed.
Recommended actions:
● No action is required.
495 Warning The algorithm for best-path routing selected the alternate path to the indicated disk because
the I/O error count on the primary path reached its threshold.
The controller that logs this event indicates which channel (path) has the problem. For example,
if the B controller logs the problem, the problem is in the chain of cables and expansion modules
connected to the B controller module.
Recommended actions:
● If this event is consistently logged for only one disk in an enclosure, perform the following
actions:
○ Replace the disk.
○ If that does not resolve the problem, the fault is probably in the enclosure midplane.
Replace the chassis FRU for the indicated enclosure.
● If this event is logged for more than one disk in an enclosure or disks in multiple enclosures,
perform the following actions:
○ Check for disconnected SAS cables in the bad path. If no cables are disconnected,
replace the cable connecting to the ingress port in the most-upstream enclosure with
reported failures. If that does not resolve the problem, replace other cables in the bad
path, one at a time until the problem is resolved.
○ If that does not resolve the problem, replace the expansion modules that are in the
bad path. Begin with the most-upstream module that is in an enclosure with reported
failures. If that does not resolve the problem, replace other expansion modules (and the
controller module) upstream of the affected enclosure(s), one at a time until the problem
is resolved.
○ If that does not resolve the problem, the fault is probably in the enclosure midplane.
Replace the chassis FRU of the most-upstream enclosure with reported failures. If that
does not resolve the problem and there is more than one enclosure with reported failures,
replace the chassis FRU of the other enclosures with reported failures until the problem is
resolved.
496
Warning An unsupported disk type was found.
Recommended actions:
● Replace the disk with a supported type.
Warning An unsupported disk vendor was found.
Recommended actions:
● Replace the disk with a disk that is supported by your system vendor.
497 Info. A disk copyback operation started. The indicated disk is the source disk.
When a disk fails, reconstruction is performed using a spare disk. When the failed disk is
replaced, the data that was reconstructed in the spare disk (and any new data that was written
to it) is copied to the disk in the slot where the data was originally located. This is known as slot
affinity.
For the copyback operation, the reconstructed disk is called the source disk, and the newly
replaced disk is called the destination disk. All of the data is copied from the source disk to the
destination disk and the source disk then becomes a spare disk again.
Recommended actions:
120 Events and event messages