Troubleshooting RAID operation errors
RAID restore
The CELVIN NAS supports exclusive RAID restore technology to restore a RAID drive
damaged due to accidental separation or removal of hard disks from the system. Via
RAID restore, you can restore an inactive RAID 1, RAID 5 or RAID 6 drive to
degraded
mode
or an inactive RAID 0 and JBOD con
fi
guration to normal mode.
Drive
RAID restore support
Maximum number of hard
disks that can be removed
Individual
No
-
JBOD
Yes
One or more
RAID 0
Yes
One or more
RAID 1
Yes
One or two
RAID 5
Yes
Two or more
RAID 6
Yes
Three or more
RAID 10
No
-
If the drive status is not active, you can install the same hard disks in the same slots of the NAS again.
►
Choose
Storage Manager
-
RAID Administration
-
Restore
.
►
Wait about 60 seconds until the process is completed.
After the restore is completed, you can access your data again.
After the RAID 1, RAID 5 or RAID 6 drive has been restored from
inactive
to
degraded
mode
(via RAID restore) you can read and write data on the drive as normal.
The drive status is restored to normal state after the synchronisation.
If the disconnected hard disk is damaged, RAID restore will not work.
CELVIN RAID 5
CELVIN RAID 6
Degenerated mode
N-1
N-1 & N-2
Write-protected (for immediate
data backup and & HDD
replacement)
N-1, bad blocks in the existing
hard disks of the network.
N-2, bad blocks in the existing
hard disks of the network.
RAID restore
(RAID Status: Not active)
If all original hard disks have
been installed on the NAS
again and started up, identi
fi
ed
and accessible, and if the HDD
super block is not damaged.
If all original hard disks have
been installed on the NAS
again and started up, identi
fi
ed
and accessible, and if the HDD
super block is not damaged.
RAID crash
N-2 failed HDD and all
remaining HDDs cannot be
started up and identi
fi
ed and
are not accessible.
N-3 and all remaining
HDDs cannot be started
up and identi
fi
ed and are not
accessible.
N = number of hard disks in the network
Fujitsu
81