User`s guide

StorageWorks RAID Array 200 Controller Installation and Standalone Configuration Utility
6–16 EK–SWRA2–IG. C01
Hot Spare
A hot spare drive is a drive in your storage enclosure that you do not bind into a
drive group, but designate as a hot spare. The drive remains unused and available
in your storage enclosure until a disk fails from a drive group on which you
configured a redundant logical RAID drive. Then, the RAID controller
automatically starts to rebuild the failed drive's data onto the hot spare disk.
You can define a hot spare drive when you configure your array for the first
time, or at another time. This drive must be of equal or greater capacity to the
drives in the drive groups on which you will configure redundant logical RAID
drives. Section 6.6.3 in this chapter describes defining a hot spare drive.
Hot Swap
Enable the StorageWorks Fault Management option, as described in Section
6.3.2, Setting Options, and you can perform a hot swap in the event of a failed
drive (if your storage enclosure supports hot swapping). You perform a hot swap
by removing the failed drive ( a drive for which the RAID controller assigned a
status of failed) from the storage enclosure. You then insert a working drive into
the same slot of the storage enclosure from which you removed the failed drive.
Shortly after you insert the replacement drive, the RAID controller automatically
starts to rebuild the failed drive's data onto the replacement drive.
NOTE
It may take minutes for a rebuild to begin on a hot
spare or after a hot swap, depending upon the
rebuild rate and activity of the subsystem.
Manually
If a drive fails, and you did not define a hot spare drive, or do not have hot swap
capability, you can manually issue a command to get the controller to rebuild the
data from a failed drive onto a replacement drive. See Chapter 7, Section 7.5.3,
for the complete procedure to rebuild a drive manually.
Now go on to Section 6.4.2 to begin configuring the array.