Hot-Swap Disk Drive Support; Auto Declare Hot-Spare - Areca ARC-1110 User Manual

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.

1.4.2 Hot-Swap Disk Drive Support

The SATA RAID controller 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 SATA
RAID controllers. This feature provides advanced fault tolerant
RAID protection and "online" drive replacement.

1.4.3 Auto Declare Hot-Spare

If a disk drive is brought online into a system operating in de-
graded mode, ARC-11xx/12xx RAID adapters will automatically
declare the new disk as a spare and begin rebuilding the degrad-
ed 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 reconfigured
an online free disk. But, the newly-installed drive is automatically
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 disappeared if the RAID sub-
system has since powered off/on.
The Hot-Swap function can be used to rebuild disk drives in arrays
with data redundancy such as RAID level 1, 1E, 3, 5, and 6.
:
INTRODUCTION
21