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

Adding Additional Shared LVM Volume Groups
To add capacity or to organize your disk resources for ease of management, you may
wish to create additional shared volume groups for your Oracle RAC databases. If you
decide to use additional shared volume groups, they must conform to the following
rules:
• Volume groups should include different PV links to each logical unit on the disk
array.
• Volume group names must be the same on all nodes in the cluster.
• Logical volume names must be the same on all nodes in the cluster.
If you are adding or removing shared LVM volume groups, make sure that you modify
the cluster configuration file and any package control script that activates and
deactiveates the shared LVM volume groups.
Changing the VxVM or CVM Storage Configuration
You can add VxVM disk groups to the cluster configuration while the cluster is running.
To add new CVM disk groups, the cluster must be running.
If you are creating new CVM disk groups, be sure to determine the master node on
which to do the creation by using the following command:
# vxdctl -c mode
One node will identify itself as the master. Create disk groups from this node.
Similarly, you can delete VxVM or CVM disk groups provided they are not being used
by a cluster node at the time.
Managing the Shared Storage 155