User manual

54
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Protection (for
immediate
data backup &
hard drive
replacement)
N/A
N-1, bad blocks
found in the
surviving hard
drives of the
array.
N/A
N-2, bad blocks
found in the
surviving hard
drives of the
array.
RAID Recovery
(RAID Status:
Not Active)
N/A
If re-plugging in
all original hard
drive to the NAS
and they can be
spun up,
identified,
accessed, and the
hard drive
superblock is not
damaged.
N/A
If re- plugging in
all original hard
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
drives and any of
the remaining hard
drives cannot be
spun up/
identified/
accessed.
N-3
N-3 and any of
the remaining hard
drives cannot be
spun up/identified/
accessed.
N = Number of hard disk drives in the array
Set/Cancel Global Spare
A global spare drive replaces a failed hard drive in any RAID 1, 5, 6, 10 disk volumes on
the NAS automatically. When the same global spare drive is shared by multiple RAID
volumes on the NAS, the spare drive will replace the first failed drive in a RAID volume.
To set a disk drive as a global spare drive, select the single disk volume and click
"Action" > "Set Global Spare". All the disk data will be cleared on the hard drive.
Note: The capacity of the global spare drive must be equal to or larger than that of a
member drive of a RAID disk volume.