State Transition Of The Raid; Figure 2-3 Raid Status Transitions; Table 2-6 Raid Statuses And Their Descriptions - Hitachi HF-W6500 60 Manual

2. ITEMS MONITORED BY THE RAS FEATURE

2.8.1 State transition of the RAID

Table 2-6 lists RAID statuses and their respective descriptions. Figure 2-3 shows the state
transitions.
RAID status
Detailed
information
Normal -
-
Degraded
Rebuild
Fail -
Unknown -
RAID rebuild
process is complete.

Table 2-6 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.
Getting the RAID status failed.
Normal
One drive fails.
One drive is disconnected
manually.
Degraded
Drive
replacement
Degraded
(Rebuild)
Two drives fail.
Fail

Figure 2-3 RAID Status Transitions

Description
Media error occurs.
Degraded
RAID rebuild process is
complete.
(Read error occurs in
Error occurs
the copy source drive.)
in the new drive.
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