Managing Serviceguard Fifteenth Edition, reprinted May 2008

Building an HA Cluster Configuration
Configuring the Cluster
Chapter 5 263
For more information, including details about configuration of plexes
(mirrors), multipathing, and RAID, refer to the HP-UX documentation
for the Veritas Volume Manager. See the documents for HP Serviceguard
Storage Management Suite posted at http://docs.hp.com.
Initializing the Veritas Volume Manager
If you are about to create disk groups for the first time, you need to
initialize the Volume Manager.
Use the following command after installing VxVM/CVM on each node:
vxinstall
This displays a menu-driven program that steps you through the
VxVM/CVM initialization sequence.
• If you are using CVM 3.5, you must create a disk group known as
rootdg that contains at least one disk. From the main menu, choose
the “Custom” option, and specify the disk you wish to include in
rootdg.
IMPORTANT The rootdg in version 3.5 of Veritas Volume Manager is not the same
as the HP-UX root disk if an LVM volume group is used for the
HP-UX root filesystem (/). Note also that rootdg cannot be used for
shared storage. However, rootdg can be used for other local
filesystems (e.g., /export/home), so it need not be wasted.
Note that you should create a root disk group only once on each node.
• CVM 4.1 and later do not require that you create the special Veritas
rootdg disk.
Preparing the Cluster for Use with CVM
In order to use the Veritas Cluster Volume Manager (CVM), you need a
cluster that is running with a Serviceguard-supplied CVM system
multi-node package. This means that the cluster must already be
configured and running before you create disk groups.
Configure system multi-node and multi-node packages using the
command line, not Serviceguard Manager. Once configured, these
cluster-wide packages’ properties have a special tab under Cluster
Properties.