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Adaptec SCSI RAID 2120S/2200S Software User’s Guide
Enabling Spares
A spare disk (also called a “hot spare”) is a disk that you configure
to recover data from a failed segment/disk in a redundant array.
To assign one or more spare disks for a single array, use the
container set failover command. To assign one or more
spare disks for all arrays, use the container set
global_failover command. The main characteristic of these
commands is that you must “manually” assign the spare disk to
one or more arrays. In fact, you might consider the previously
described spare mechanism as “manually set spare.”
Note: RAID 1, 5 10 and 50 use the spare assignment if a disk
fails. (RAID 1, 5, 10 and 50 are often referred to as redundant
arrays).
Automatic rebuild on replacement allows you to replace a failed
disk with a replacement disk. The controller automatically assigns
the disk you insert as a hotspare without your having to first assign
it manually using the container set failover or
container set global_failover command.
See the Adaptec SCSI RAID Software Reference Guide for more
information on the container set failover and container
set global_failover commands.
Caution: The controller deletes any data on the replacement
disk when automatic rebuild on replacement is enabled and
you remove the failed disk and insert the replacement disk in
the failed disk’s slot.
Note: The automatic spare feature works only with disks that
reside in an SAF-TE or SES enabled enclosure.
Through the CLI, you can:
■ Display a controller’s automatic rebuild on replacement status
■ Enable automatic rebuild on replacement
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UG.book Page 8 Saturday, October 26, 2002 12:08 PM