AIX : How to setup LVM hot spare

AIX : How to setup LVM hot spare

Hot Spare only works if the volume group has mirrored logical volumes. There can be no logical partitions using the drive to be marked a hot spare. The following command marks hdisk1 as a hot spare disk:

# chpv -hy hdisk1

Now that the drive is marked as a hot spare, we need to determine the "hot spare policy" and the "sync policy". Here are our options:

hotsparepolicy:

y : This policy automatically migrates partitions from one failing disk to one
spare disk. From the pool of hot spare disks, the smallest one that is big
enough to substitute for the failing disk will be used.

Y : This policy automatically migrates partitions from a failing disk, but might
use the complete pool of hot spare disks.

n :No automatic migration will take place. This is the default value for a volume group.

r :This value removes all disks from the pool of hot spare disks for this volume group.

syncpolicy:

y: This will automatically try to synchronize stale partitions.

n: This will not automatically try to synchronize stale partitions. The latter argument is also the default for a volume group.

This is the syntax to set the policies:

# chvg -h hotsparepolicy -s syncpolicy VolumeGroup

for example:

# chvg -hy -sy vgname

Now the volume group will have a hot spare disk.