Managing Serviceguard 12th Edition, March 2006

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5 239
NOTE You must use the vgcfgbackup command to store a copy of the cluster
lock disk's configuration data whether you created the volume group
using SAM or using HP-UX commands.
If the cluster lock disk ever needs to be replaced while the cluster is
running, you
must use the vgcfgrestore command to restore lock
information to the replacement disk. Failure to do this might result in a
failure of the entire cluster if all redundant copies of the lock disk have
failed and if replacement mechanisms or LUNs have not had the lock
configuration restored. (If the cluster lock disk is configured in a disk
array, RAID protection provides a redundant copy of the cluster lock
data. Mirrordisk/UX does not mirror cluster lock information.)