Areca ARC-8050T3U 6-Bay Thunder3 Desktop RAID Storage Array - Manual (Page 150)

APPENDIX
150
cal drive that has been marked as a hot spare and therefore
is not a member of any RAID set. If a disk drive used in a
volume set fails, then the hot spare will automatically take
its place and he 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 SAS/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 occurred.