QNAP TS-231 Manuel D’Utilisation
61
Standard
RAID 5
RAID 5
QNAP RAID 5
Standard
RAID 6
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)
(for immediate data
backup & hard drive
replacement)
N/A
N-1, bad blocks
found in the
surviving drives of
the array.
found in the
surviving drives of
the array.
N/A
N-2, bad blocks
found in the
surviving drives of
the array.
found in the
surviving drives of
the array.
RAID recovery
(RAID status: Not
active)
(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.
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).
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.
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.
remaining hard
drives cannot be
spun up or
identified or
accessed.
N = Number of hard disk drives in the array