User manual
INTRODUCTION
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ically take its place and the data previously located on the failed
drive is reconstructed on the global hot spare.
For this feature to work properly, the global hot spare must have
at least the same capacity as the drive it replaces. Global hot
spares only work with RAID level 1, 10, 3, 5, or 6 volume set. You
can congure up to three global hot spares with ARC-11xx/12xx.
The “Create Hot Spare” option gives you the ability to dene
a global hot spare disk drive. To effectively use the global hot
spare feature, you must always maintain at least one drive that is
marked as a global spare.
Important:
The hot spare must have at least the same capacity as the
drive it replaces.
• Hot-Swap Disk Drive Support
The SATA 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 at prices
much less than the cost of conventional SCSI hard disk RAID
controllers. 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 SATA RAID controllers will automatically de-
clare 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.
In the normal status, the newly installed drive will be recong-
ured an online free disk. But, the newly-installed drive is auto-
matically assigned as a hot spare if any hot spare disk was used
to rebuild and without new installed drive replaced it. In this
condition, the auto declare hot-spare status will be disappeared if
the RAID subsystem has since powered off/on.