Checking RAID Devices
If a RAID array that belongs to an Xsan volume becomes damaged and unrecoverable
due to a failed disk drive or other hardware failure, the data on the volume can be lost.
To avoid this possibility:
Regularly check the state of your RAID hardware, either by using the management
application that came with the RAID system or by visiting the hardware to check
the state of the status lights. You might be able to set up your RAID system
management application to notify you when an array is degraded.
If an array becomes degraded, replace the failed drive immediately to avoid the
possibility of an additional drive failure causing the loss of the entire array. To have
this happen automatically, set up your arrays with hot spare drives.