15
Setting Up a Spare RAID Disk
You can designate a hard drive to be used as a spare drive for a RAID 1 or RAID
0+1 array2. The spare drive can take over for a failed disk. NVIDIA RAID supports
two types of spare drives:
•
Free Disk
A free disk is a disk that is not part of any RAID array, but can be used by any
available RAID 1 or RAID 0+1 array that requires a particular disk when one of its
disks crashes or becomes unusable. The process is automatic and doesn
’
t
require any user interaction.
For example, if you have a system with four hard disks where one disk is used
to boot the OS, two hard drives are set up in a mirrored array, and a fourth hard
disk is set up as a free disk, then if one of the mirrored array drives fails, the free
disk will be automatically assigned to the mirrored array to be used instead of
the failed disk.
•
Dedicated Disk
A dedicated free disk is a disk that is assigned to a RAID 1 or RAID 0+1 array and
that disk is used by that array only when needed, for example during a system
crash where a RAID mirrored drive is broken. The dedicated disk can be used
only by the array that it is assigned to and not by any other array, unlike a free
disk which can be used by any available RAID 1 or RAID 0+1 array.
Note:
You must have at least two RAID arrays to use this feature.
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