Areca ARC-1130, ARC-1110, ARC-1120 manual Hot-Swap Disk Drive Support, Auto Declare Hot-Spare

INTRODUCTION

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 controller chip includes a protection circuit that supports the replacement of SATA hard disk drives without having to shut down or reboot the system. A removable hard drive tray can de- liver “hot swappable” fault-tolerant RAID solutions at prices much less than the cost of conventional SCSI hard disk RAID control- lers. 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, 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 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.

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