Using Serviceguard Extension for RAC, 2nd Edition, February 2005 Update

Serviceguard Configuration for Oracle RAC
Creating a Storage Infrastructure with CVM
Chapter 2 55
Starting the Cluster and Identifying the Master Node
Run the cluster, which will 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.
Converting Disks from LVM to CVM
You can use the vxvmconvert utility to convert LVM volume groups into
CVM 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. The procedure is described in Appendix F.
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).
To initialize a disk for CVM, log on to the master node, then use the
vxdiskadm program to initialize multiple disks, or use the vxdisksetup
command to initialize one disk at a time, as in the following example:
# /usr/lib/vxvm/bin/vxdisksetup -i /dev/dsk/c0t3d2
Creating Disk Groups for RAC
Use the vxdg command to create disk groups. Use the -s option to specify
shared mode, as in the following example:
# vxdg -s init ops_dg c0t3d2
Verify the configuration with the following command: