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Operation when failed Physical Device is replaced to recover RAID System
Using the RAID System continuously with the redundancy of a Logical Drive remaining degraded may cause the data in the Logical Drive to be lost when another Physical Device is
failed further. Recover a Logical Drive of degraded redundancy by Hot Spare or replacement of the failed Physical Device.
If Hot Spare or replacement of a failed Physical Device operates Rebuild, the status of the Physical Device changes during the rebuilding (with its [Status] changed to [Rebuilding]).
Figure 24 Display of RAID Viewer /raidcmd (Rebuilding of Physical Device)
existence of
[Degraded] node.
> raidcmd property -tg=ld -c=1 -l=1
RAID Controller #1 Logical Drive #1
ID : 0
Physical Device Number : 1, 2, 3
Disk Array Number : 1
RAID Level : 5
Stripe Size : 64KB
Capacity : 146GB
Cache Mode (Current) : Write Back
Cache Mode (Setting) : Auto Switch
Status : Degraded
>
Structure and Status of RAID System
[Rebuilding]
[Ready]
(Failed)
RAID Level: 5
[Online]
[Online]
[Rebuilding]
[Degraded]
Device
[Ready]
> raidcmd property -tg=pd -c=1 -p=3
RAID Controller #1 Physical Device #3
ID : 0
Enclosure : 1
Slot : 3
Device Type : HDD
Interface : SAS
Vendor/Model : Seagate ST12345678
Firmware Version : BK09
Serial Number : 1111
Capacity : 146GB
Status : Ready
S.M.A.R.T. : Normal
>
> raidcmd property -tg=pd -c=1 -p=4
RAID Controller #1 Physical Device #4
ID : 0
Enclosure : 1
Slot : 4
Device Type : HDD
Interface : SAS
Vendor/Model : Seagate ST12345678
Firmware Version : BK09
Serial Number : 1111
Capacity : 146GB
Status : Rebuilding
S.M.A.R.T. : Normal
>
After Rebuild starts, various results such as [Status]
changes [Ready] cannot recognize existence, and
[Status] keep [Failed] are thought by RAID
Controller's kind and the kind of the occurring issue
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