Owners Manual

Table 27. Event descriptions and recommended actions (continued)
Number Severity Description/Recommended actions
Recommended actions:
● Replace the controller module that logged this event.
Warning An uncorrectable ECC error occurred in cache memory.
This event is logged with Warning severity to provide information that may be useful to technical
support, but no action is required now. It will be logged with Error severity if it is necessary to
replace the controller module.
Recommended actions:
● No action is required.
52 Info. Disk group expansion has started.
This operation can take days, or weeks in some cases, to complete. Allow adequate time for the
expansion to complete.
When complete, event 53 is logged.
Recommended actions:
● No action is required.
53 Warning Too many errors occurred during disk group expansion to allow the expansion to continue.
Recommended actions:
● If the expansion failed because of a disk problem, replace the disk with one of the same
type (SSD, enterprise SAS, or midline SAS) and the same or greater capacity. For continued
optimum I/O performance, the replacement disk should have performance that is the same
as or better than the one it is replacing. If disk group reconstruction starts, wait for it to
complete and then retry the expansion.
Info. Disk group expansion either completed, failed immediately, or was aborted by a user.
Recommended actions:
● If the expansion failed because of a disk problem, replace the disk with one of the same
type (SSD, enterprise SAS, or midline SAS) and the same or greater capacity. For continued
optimum I/O performance, the replacement disk should have performance that is the same
as or better than the one it is replacing. If disk group reconstruction starts, wait for it to
complete and then retry the expansion.
54 Info. Battery needs replacing.
The battery provides backup power for the real-time (date/time) clock. In the event of a power
failure, the date and time will revert to 1980-01-01 00:00:00.
Recommended actions:
● Replace the controller module that logged this event.
55 Warning The indicated disk reported a SMART event.
A SMART event indicates impending disk failure.
Recommended actions:
● Resolve any non-disk hardware problems, especially a cooling problem or a faulty power
supply.
● If the disk is in a disk group that uses a non-fault-tolerant RAID level (RAID 0 or non-RAID),
copy the data to a different disk group and replace the faulty disk.
● If the disk is in a disk group that uses a fault-tolerant RAID level, check the current state of
the disk group. If it is not FTOL then back up the data as data may be at risk. If it is FTOL
then replace the indicated disk. If more than one disk in the same disk group has logged a
SMART event, back up the data and replace each disk one at a time. In virtual storage it may
be possible to remove the affected disk group, which will drain its data to another disk group,
and then re-add the disk group.
56 Info. A controller has powered up or restarted.
80 Events and event messages