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2.6.1 State transition of the RAID
Table 2-1 lists RAID statuses and their respective descriptions. Figure 2-2 shows the state
transitions.
RAID status
Detailed
information
Normal
–
–
Degraded
Rebuild
Fail
–
Unknown –
RAID rebuild
process is complete.
Table 2-1 RAID Statuses and their Descriptions
Redundant data is intact, and the RAID is operating normally.
One drive failed, and a part of redundant data is corrupted.
The RAID is being rebuilt due to drive replacement or other reason.
Both drives failed, or drives are not connected.
Getting the RAID status failed, or the array configuration is not normal.
Normal
One drive fails.
Degraded
Drive
replacement
Degraded
(Rebuild)
Two drives fail.
Fail
Figure 2-2 RAID Status Transitions
2. ITEMS MONITORED BY THE RAS FEATURE
Description
Media error occurs.
Degraded
RAID rebuild process is
complete.
(Read error occurs in
Error occurs
the copy source drive.)
in the new drive.
2-7
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