User manual

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Recover (RAID Recov ery )
RAID Recovery: When the NAS is configured as RAID 5 (or RAID 6) and 2 (or 3) HDD are uplugged
from the server accidentally, you can plug in the same HDD into the same drive slots and click
‘Recover’ to recover the volume status from ‘Not active’ to ‘Degraded mode’.
If the disk volume is configured as RAID 0 or JBOD and one or more of the HDD members are
disconnected, you can use this function to recover the volume status from ‘Not active’ to ‘Normal’.
The disk volume can be used normally after successful recovery.
No te : If the disconnected drive member is damaged, the RAID recovery function will not work.
Sta ndard RA ID 5
QNA P RA ID 5
Sta ndard RA ID 6
QNA P RA ID 6
Degraded mode
N-1
N-1
N-1 & N-2
N-1 & N-2
Read Only
Protection (for
immediate data
backup & HDD
replacement)
N/A
N-1, bad blocks
found in the
surviving HDD of
the array.
N/A
N-2, bad blocks
found in the
surviving HDD of
the array.
RAID Recovery
(RAID Status: Not
Active)
N/A
If re-plugging in
all original HDD to
the NAS and they
can be spun up,
identified,
accessed, and the
HDD superblock is
not damaged.
N/A
If re- plugging in
all original HDD to
the NAS and they
can be spun up,
identified,
accessed, and the
HDD superblock is
not damaged).
RAID Crash
N-2
N-2 failed HDD
and any of the
remaining HDD
cannot be spun
up/ identified/
accessed.
N-3
N-3 and any of
the remaining
HDD cannot be
spun up/
identified/
accessed.
N = Number of hard disk drives (HDD) in the array