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| Marking a disk as a hot-relocation spare | ||
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| Prev | Administering hot-relocation | Next |
Hot-relocation allows the system to react automatically to I/O failure by relocating redundant subdisks to other disks. Hot-relocation then restores the affected VxVM objects and data. If a disk has already been designated as a spare in the disk group, the subdisks from the failed disk are relocated to the spare disk. Otherwise, any suitable free space in the disk group is used except for the free space on the disks that were previously excluded from hot-relocation use.
To designate a disk as a hot-relocation spare, enter the following command:
# vxedit [-g diskgroup] set spare=on diskname
where diskname is the disk media name.
For example, to designate mydg01 as a spare in the disk group, mydg, enter the following command:
# vxedit -g mydg set spare=on mydg01
You can use the vxdisk list command to confirm that this disk is now a spare; mydg01 should be listed with a spare flag.
Any VM disk in this disk group can now use this disk as a spare in the event of a failure. If a disk fails, hot-relocation automatically occurs (if possible). You are notified of the failure and relocation through electronic mail. After successful relocation, you may want to replace the failed disk.
To use vxdiskadm to designate a disk as a hot-relocation spare
Enter disk name [<disk>,list,q,?] mydg01
The following notice is displayed when the disk has been marked as spare:
VxVM NOTICE V-5-2-219 Marking of mydg01 in mydg as a spare disk is complete.
Mark another disk as a spare? [y,n,q,?] (default: n)
Any VM disk in this disk group can now use this disk as a spare in the event of a failure. If a disk fails, hot-relocation should automatically occur (if possible). You should be notified of the failure and relocation through electronic mail. After successful relocation, you may want to replace the failed disk.