Using Serviceguard Extension for RAC, 6th Edition, April 2008

CVM is now unconfigured
Creating a Storage Infrastructure with CVM
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). LVM and VxVM configuration are done before cluster configuration,
and CVM configuration is done after cluster configuration (on HP-UX releases that
support them; see “About Veritas CFS and CVM from Symantec” (page 25)).
This section shows how to configure storage using the Veritas Cluster Volume Manager
(CVM). The examples show how to configure RAC disk groups, but you can also create
CVM disk groups for non-RAC use. For more information, including details about
configuration of plexes (mirrors), multi-pathing, and RAID, refer to the HP-UX
documentation for the Veritas Volume Manager.
Initializing the Veritas Volume Manager
If you are about to create disk groups for the first time, you need to initialize the Volume
Manager. This is done by creating a disk group known as rootdg that contains at least
one disk. Use the following command after installing CVM on each node:
# vxinstall
This displays a menu-driven program that steps you through the CVM initialization
sequence. From the main menu, choose the “Custom” option, and specify the disk you
wish to include in rootdg.
IMPORTANT: Creating a rootdg disk group is only necessary the first time you use
the Volume Manager. CVM 4.1 or later does not require a rootdg.
Using CVM 4.x or later
This section has information on how to prepare the cluster and the system multi-node
package with CVM 4.x or later only (without the CFS filesystem); (on HP-UX releases
that support them; see “About Veritas CFS and CVM from Symantec” (page 25)).
For more detailed information on how to configure CVM 4.x or later, refer the Managing
Serviceguard Fifteenth Edition user’s guide.
Preparing the Cluster and the System Multi-node Package for use with CVM 4.x or later
1. Create the Cluster file:
# cd /etc/cmcluster
# cmquerycl -C clm.asc -n ever3a -n ever3b
Edit Cluster file
Creating a Storage Infrastructure with CVM 117