Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004

Building an HA Cluster Configuration
Creating a Storage Infrastructure with CVM
Chapter 5230
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). You
can also use a mixture of volume types, depending on your needs. LVM
and VxVM configuration are done before cluster configuration, and CVM
configuration is done after cluster configuration.
For a discussion of migration from LVM to VxVM or CVM storage, refer
to Appendix H.
This section shows how to configure storage using the command set of
the VERITAS Cluster Volume Manager (CVM). Before starting, make
sure the directory in which VxVM commands are stored
(/usr/lib/vxvm/bin) is in your path. Once you have created the root
disk group with vxinstall, you can use VxVM commands or the
VERITAS Storage Administrator GUI, vmsa, to carry out configuration
tasks. If you are using vmsa, be sure the storage administrator server is
running before you launch the GUI. Detailed instructions for running
vxinstall are given in the VERITAS Volume Manager 3.5 Release
Notes. For more information, refer to the VERITAS Volume Manager 3.5
Administrator’s Guide.
Separate procedures are given below for:
• Creating a Root Disk Group
• Preparing the Cluster for Use with CVM
• Creating Disk Groups for Shared Storage
For more information, including details about configuration of plexes
(mirrors), multipathing, 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 VxVM/CVM on each node: