User`s manual

2.4 RAID VOLUME STATUS
A RAID volume can be in any one of the following statuses.
STATUS MEANING
Good All disks are currently functioning as normal.
Reduced
For RAID levels that provide data protection, one or more disks have failed but the data is
still available via the RAID algorithms. The failed disk should be replaced as soon as
possible to avoid loss of data.
Rebuilding
A failed disk drive has been replaced and the data is being regenerated on the replacement
disk. When complete, the RAID Group will return to Good status.
Resynchronizing
An error has occurred and RAID algorithms be regenerated on this RAID Group. When
complete, the RAID Group will return to Good status.
Failed
One or more disks have failed and RAID algorithms can no longer regenerate the data. The
minimum number of failures required to reach this state depends on the RAID level:
a RAID 0, Concatenated, Contiguous: Single disk failure.
a RAID 1, 10, and 5: Two disk failure.
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