Managing Serviceguard Sixteenth Edition, March 2009

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/SMS/Serviceguard Manager Plug-in 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)” (page 241), has information about configuring the Veritas Cluster Volume
Manager (CVM) with other filesystems, not CFS. Both solutions use many of the same
commands, but the processes are in a slightly different order. Another difference is
that when you use CFS, Serviceguard creates packages to manage the disk groups and
mount points so you do not activate CFS disk groups or CFS mount points in your
application packages.
Refer to the Serviceguard man pages for more information about the commands
cfscluster, cfsdgadm, cfsmntadm, cfsmount and cfsumount, and cmgetpkgenv.
Information is also in the documentation for HP Serviceguard Storage Management
Suite posted at http:// docs.hp.com -> High Availability -> HP
Serviceguard Storage Management Suite.
Configuring the Cluster 233