Managing Serviceguard Eighteenth Edition, September 2010

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 www.hp.com/go/hpux-serviceguard-docs.
This section provides information about configuring a cluster that uses the Veritas
cluster file system (CFS) with Veritas cluster volume manager (CVM) 4.1 and later.
When you use CFS, Serviceguard creates packages to manage the disk groups and
mount points; you do not activate CFS disk groups or CFS mount points in your
application packages. Configure CVM/CFS after you configure the cluster.
NOTE: The next section, “Creating the Storage Infrastructure with Veritas Cluster
Volume Manager (CVM)” (page 268), explains how to configure Veritas Cluster Volume
Manager (CVM) disk groups without CFS; that is, for raw access only. Both solutions
use many of the same commands, but in a slightly different order.
Refer to the Serviceguard man pages for more information about the commands
cfscluster, cfsdgadm, cfsmntadm, cfsmount, cfsumount, and cmgetpkgenv.
Information is also in the documentation for HP Serviceguard Storage Management
Suite posted at www.hp.com/go/hpux-serviceguard-docs.
IMPORTANT: Before you proceed, make sure you have read “Planning Veritas Cluster
Volume Manager (CVM) and Cluster File System (CFS)” (page 170), which contains
important information and cautions.
Preparing the Cluster and the System Multi-node Package
The Veritas cluster volumes are managed by a Serviceguard-supplied system multi-node
package, SG-CFS-pkg, which runs on all nodes at once, and cannot fail over.
Configuring the Cluster 261