Managing Serviceguard Nineteenth Edition, Reprinted June 2011

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.
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, SG-CFS-pkg. This means that the
cluster must already be configured and running before you create disk groups.
NOTE: Cluster configuration is described under “Configuring the Cluster ” (page 177).
Check the heartbeat configuration. CVM 4.1 and later versions require that the cluster have either
multiple heartbeats or a single heartbeat with a standby, and do not allow the use of Auto Port
Aggregation, Infiniband, or VLAN interfaces as a heartbeat subnet.
The CVM cluster volumes are managed by a Serviceguard-supplied system multi-node package
which runs on all nodes at once, and cannot fail over. For CVM 4.1 and later, Serviceguard creates
the SG-CFS-pkg.
The SG-CFS-pkg package has the following responsibilities:
• Maintain Veritas configuration files /etc/llttab, /etc/llthosts, /etc/gabtab
• Launch required services: cmvxd, cmvxpingd, vxfsckd
• Start/halt Veritas process in the proper order: llt, gab, vxfen, odm, cvm, cfs
Use the cmapplyconf command to create the system multi-node package that communicates
cluster information to CVM:
cmapplyconf -P /etc/cmcluster/cfs/SG-CFS-pkg.conf
Begin package verification ...
Modify the package configuration ([y]/n)? Y
Completed the cluster update
IMPORTANT: Do this only if you are using CVM without CFS. If you are using CFS, you set up
CVM as part of CFS; see “Creating a Storage Infrastructure with Veritas Cluster File System (CFS)”
(page 190).
Identifying the Master Node
If it is not already running, start the cluster. This will automatically activate the special CVM package:
cmruncl
When CVM starts up, it selects a master node, and this is the node from which you must issue the
disk group configuration commands. To determine the master node, issue the following command
from each node in the cluster:
vxdctl -c mode
One node will identify itself as the master. Create disk groups from this node.
Initializing Disks for CVM
You need to initialize the physical disks that will be employed in CVM disk groups. If a physical
disk has been previously used with LVM, you should use the pvremove command to delete the
LVM header data from all the disks in the volume group (this is not necessary if you have not
previously used the disk with LVM).
Configuring the Cluster 209