Managing Serviceguard Fifteenth Edition, reprinted May 2008

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5 251
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 the System Management Homepage (SMH), SAM, or 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.)
Creating a Storage Infrastructure with Veritas
Cluster File System (CFS)
NOTE Check the Serviceguard, SGeRAC, and SMS Compatibility and Feature
Matrix and the latest Release Notes for your version of Serviceguard for
up-to-date information about support for CFS (and CVM - Cluster
Volume Manager) at http://www.docs.hp.com -> High Availability
-> Serviceguard.
In addition to configuring the cluster, you create the appropriate logical
volume infrastructure to provide access to data from different nodes.
This is done with Logical Volume Manager (LVM), Veritas Volume
Manager (VxVM), or Veritas Cluster Volume Manager (CVM). You can
also use a mixture of volume types, depending on your needs. LVM and
VxVM configuration are done before cluster configuration, and CVM
configuration is done after cluster configuration.
This section has information about configuring a cluster that uses the
Veritas cluster file system (CFS) with Veritas cluster volume manager
(CVM) 4.1 and later. The next section (“Creating the Storage
Infrastructure with Veritas Cluster Volume Manager (CVM)” on
page 262) has information about configuring the Veritas Cluster Volume
Manager (CVM) with other filesystems, not CFS. Both solutions use