Owners Manual

Table 27. Event descriptions and recommended actions (continued)
Number Severity Description/Recommended actions
● Replace the failed disk.
548 Warning Disk group reconstruction failed.
When a disk fails, reconstruction is performed using a spare disk. In this case, the reconstruction
operation failed because unreadable data (uncorrectable media error) exists in at least one other
disk in the disk group. Because of this, a portion of the data cannot be reconstructed.
Recommended actions:
● If you do not have a backup copy of the data in the disk group, make a backup.
● Note the configuration of the disk group, such as its size and host mappings.
● Look for another event logged at approximately the same time that indicates a disk failure,
such as event 8, 55, 58, or 412. Follow the recommended actions for that event.
●
Remove the disk group.
● Re-add the disk group.
● Restore the data from the backup to a new disk group.
549 Critical The indicated controller module detected that it recovered from an internal processor fault.
Recommended actions:
● Replace the controller module.
550 Critical The read data path between the Storage Controller and the disk drives was detected to be
unreliable. The Storage Controller took action to correct this.
Recommended actions:
● Replace the controller.
551 Error An EMP reported one of the following for a power supply unit (PSU):
● The PSU is unable to communicate with the EMP.
● The PSU in an enclosure does not have power supplied to it or has a hardware failure.
● The PSU is running with corrupted firmware.
Recommended actions:
● If the EMP is unable to communicate with the indicated PSU:
○ Wait for at least 10 minutes and check if the error resolves.
○ If the error persists, check that all modules in the enclosure are fully seated in their slots
and that their latches, if any, are locked.
○ If this does not resolve the issue, note down the PSU. Ensure the partner PSU is not
degraded. If the partner PSU is degraded, contact technical support.
○ If the partner PSU is not degraded, remove and reinsert the indicated PSU..
○ If this does not resolve the issue, the indicated FRU has probably failed and should be
replaced.
● If one of the PSUs in an enclosure does not have power supplied to it or has a hardware
failure:
○ Check that the indicated PSU is fully seated in its slot and that the PSU's latches, if any,
are locked.
○ Check that each PSU has its switch turned on (if equipped with a switch).
○ Check that each power cable is firmly plugged into both the PSU and a functional
electrical outlet.
○ If none of these recommended actions resolve the issue, the indicated PSU has probably
failed and should be replaced.
● If a PSU is running with corrupted firmware:
○ The indicated PSU has failed and should be replaced.
When the problem is resolved, an event with the same code will be logged with Resolved
severity.
Warning
An EMP reported that a power supply unit (PSU) has been uninstalled.
Recommended actions:
● Check that the indicated PSU is in the indicated enclosure.
128 Events and event messages