IEI Technology IS-453S-8G, User Manual

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IS-453S-8G Industrial NAS
Page 24
NOTE:
After recovering a RAID 1, RAID 5, or RAID 6 disk volume from not active to
degraded mode by the RAID recovery, users can read or write the volume
normally. The volume status will be recovered to normal after synchronization.
If the disconnected drive member is damaged, the RAID recovery function will
not work.
Standard
RAID 5
QNAP RAID 5 Standard
RAID 6
QNAP RAID 6
Degraded mode N-1 N-1 N-1 & N-2 N-1 & N-2
Read only protection
(for immediate data
backup & hard drive
replacement)
N/A N-1, bad blocks found
in the surviving drives
of the array.
N/A N-2, bad blocks found
in the surviving drives
of the array.
RAID recovery
(RAID status: Not
active)
N/A 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.
N/A 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 N-2 failed hard drive
and any of the
remaining hard drives
cannot be spun up or
identified or
accessed.
N-3 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