73
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