61
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
Se tting/C a nc e ling Globa l Spa re
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 dis k da ta will be c le a re d on the ha rd driv e .
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.
To cancel a global spare drive, select the drive and click "Action" > "Cancel Spare Drive".
F urthe r Inform a tion a bout RAID M a na ge m e nt of the NAS
The NAS supports the following actions according to the number of hard disk drives and
disk configurations supported. Refer to the following table for details.
O rigina l Dis k
C onfigura tion *
No. of H a rd Dis k
Driv e s
No. of Ne w
H a rd Dis k
Driv e s
Ac tion
Ne w Dis k
C onfigura tion * No. of
H a rd Dis k Driv e s
RAID 5 * 3
1
Add hard drive
member
RAID 5 * 4
RAID 5 * 3
2
Add hard drive
member
RAID 5 * 5
