Can you share 2 or 3 'spare-disks' between multiple raid sets?
Eg. I have a 22 disk array chopped into multiple 4 disk raid-5 volumes, this
leaves me with 2 disks left over.. Can I assign these two drives as floating
spares incase of failure.. this will obviously be a 'first come first serve'
scenario for raid failure.. but its better then not using them.
## Vol 00 ##
raiddev /dev/md/0
raid-level 5
nr-raid-disks 3
nr-spare-disks 1
persistent-superblock 1
chunk-size 128
parity-algorithm left-symmetric
device /dev/scsi/host2/bus0/target0/lun0/part1
raid-disk 0
device /dev/scsi/host2/bus0/target1/lun0/part1
raid-disk 1
device /dev/scsi/host2/bus0/target2/lun0/part1
raid-disk 2
device /dev/scsi/host2/bus0/target3/lun0/part1
spare-disk 0
## Vol 01 ##
raiddev /dev/md/1
raid-level 5
nr-raid-disks 3
nr-spare-disks 1
persistent-superblock 1
chunk-size 128
parity-algorithm left-symmetric
device /dev/scsi/host2/bus0/target4/lun0/part1
raid-disk 0
device /dev/scsi/host2/bus0/target5/lun0/part1
raid-disk 1
device /dev/scsi/host2/bus0/target6/lun0/part1
raid-disk 2
device /dev/scsi/host2/bus0/target3/lun0/part1
spare-disk 0
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