Managing Serviceguard 13th Edition, February 2007

Building an HA Cluster Configuration
Creating the Storage Infrastructure and Filesystems with LVM and VxVM
Chapter 5216
Initializing the Veritas Cluster Volume Manager 3.5
NOTE CVM (and CFS - Cluster File System) are supported on some, but not all
current releases of HP-UX. Check the latest Release Notes for your
version of Serviceguard for up-to-date information
(http://www.docs.hp.com -> High Availability ->
Serviceguard).
With CVM 3.5, 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 once only, immediately after installing VxVM on
each node:
# vxinstall
This displays a menu-driven program that steps you through the VxVM
initialization sequence. From the main menu, choose the “Custom”
option, and specify the disk you wish to include in rootdg.
IMPORTANT The rootdg for the VERITAS Cluster Volume Manager 3.5 is not the
same as the HP-UX root disk if an LVM volume group is used for the
HP-UX root disk 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. (CVM 4.1 does not have
this restriction.)
Note that you should create a rootdg disk group only once on each node.
Converting Disks from LVM to VxVM
You can use the vxvmconvert(1m) utility to convert LVM volume groups
into VxVM disk groups. Before you can do this, the volume group must be
deactivated, which means that any package that uses the volume group
must be halted. Follow the conversion procedures outlined in the
VERITAS Volume Manager Migration Guide for your version of VxVM.
Before you start, be sure to create a backup of each volume group’s
configuration with the vgcfgbackup command, and make a backup of
the data in the volume group. See “Migrating from LVM to VxVM Data
Storage” on page 449 for more information about conversion.