Troubleshooting RAID operation errors
58
Fujitsu
CELVIN RAID 5
CELVIN RAID 6
Degraded mode
N-1
N-1 & N-2
Read only protection (for
immediate data backup & hard
drive replacement)
N-1, bad blocks found in the
surviving drives of the array.
N-2, bad blocks found in the
surviving drives of the array.
RAID recovery
(RAID status: Not active)
If re-inserting all the original
hard disk drives to the NAS and
they can be spun up, identified,
accessed, and the hard drive
superblock is not damaged.
If re-inserting all the original
hard disk drives to the NAS and
they can be spun up, identified,
accessed, and the hard drive
superblock is not damaged).
RAID crash
N-2 failed hard drive and any of
the remaining hard drives
cannot be spun up or identified
or accessed.
N-3 and any of the remaining
hard drives cannot be spun up
or identified or accessed.
N = Number of hard disk drives in the array
