Managing Serviceguard Seventeenth Edition, First Reprint December 2009

F Migrating from LVM to VxVM Data Storage
This appendix describes how to migrate LVM volume groups to VxVM disk groups
for use with the Veritas Volume Manager (VxVM), or with the Cluster Volume Manager
(CVM) on systems that support it. Topics are as follows:
• Loading VxVM
• Migrating Volume Groups (page 437)
• Customizing Packages for VxVM (page 438)
• Customizing Packages for CVM (page 440)
• Removing LVM Volume Groups (page 440)
The emphasis is on the steps you must take to manage the cluster and packages during
migration; detailed instructions for configuring VxVM disk groups are at http://
docs.hp.com in the Veritas Volume Manager Administrator’s Guide and the Veritas
Volume Manager Migration Guide for your VxVM version. Refer to Chapter 5 of the
present manual for information on creating basic storage for a new system starting
with fresh disks.
The procedures described below can be carried out while the cluster is running, but
any package that uses a volume group that is being migrated must be halted.
Loading VxVM
Before you can begin migrating data, you must install the Veritas Volume Manager
software and all required VxVM licenses on all cluster nodes. This step requires each
system to be rebooted, so it requires you to remove the node from the cluster before
the installation, and restart the node after installation. This can be done as a part of a
rolling upgrade procedure, described in Appendix E.
Information about VxVM installation are in the Veritas Installation Guide for your
version of VxVM, available fromhttp://www.docs.hp.com.
Migrating Volume Groups
The following procedure shows how to do the migration of individual volume groups
for packages that are configured to run on a given node. You should convert all the
volume groups for a package at the same time.
It is assumed that VxVM software and an appropriate version of HP-UX and
Serviceguard have been installed on the node, and that the node has rebooted and
rejoined the cluster.
1. Halt the package that activates the volume group you wish to convert to VxVM:
cmhaltpkg PackageName
2. Activate the LVM volume group in read-only mode:
vgchange -a r VolumeGroupName
Loading VxVM 437