DATOptic RM12-S6.TB - Rackmount - Manual (Page 78)

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APPENDIX
data previously located on the failed drive is reconstructed on
the hot spare.
Dedicated hot spare is assigned to serve one specified RAID
set. Global hot spare is assigned to serve all RAID set on the
RAID controller. Dedicated hot spare has higher priority than the
global hot spare. For this feature to work properly, the hot spare
must have at least the same capacity as the drive it replaces.
The host spare function only works with RAID level 1, 1E, 3, 5,
6, 10, 30, 50, or 60 volume set.
The “Create Hot Spare” option gives you the ability to define a
global/dedicated hot spare disk drive. To effectively use the hot
spare feature, you must always maintain at least one drive that
is marked as a global hot spare.
Important
:
The hot spare must have at least the same capacity as the
drive it replaces.
• Hot-Swap Disk Drive Support
The RAID controller chip includes a protection circuit that sup-
ports the replacement of SATA hard disk drives without having
to shut down or reboot the system. A removable hard drive tray
can deliver “hot swappable” fault-tolerant RAID solutions. This
feature provides advanced fault tolerant RAID protection and
“online” drive replacement.
• Auto Declare Hot-Spare
If a disk drive is brought online into a system operating in de-
graded mode, the RAID controllers will automatically declare the
new disk as a spare and begin rebuilding the degraded volume.
The Auto Declare Hot-Spare function requires that the smallest
drive contained within the volume set in which the failure oc-
curred.
In the normal status, the newly installed drive will be reconfig-
ured an online free disk. But, the newly-installed drive is au-