Solution when a RAID group is abnormal

Check the event information on ISM and determine the reason why the RAID group is degraded due to disk failures.
Bit error isolation
Note: Check whether there are events indicating excessive bit errors related to the disk. If yes, the disk may be isolated due to excessive bit errors.

Troubleshooting: Analyze the SES log and determine why there are excessive bit errors.
Disk fault
Note: The disk fault cannot be rectified. As a result, accessing the disk fails and disk rejection occurs.

Troubleshooting: Replace the faulty disk.
Disk enclosures are offline.
Note: If a RAID group consists of disks from different enclosures and disk enclosures are offline, the RAID group will be degraded or fail.

Recommended action: Check whether the disk enclosures are offline.

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