Using Serviceguard Extension for RAC, 9th Edition, September 2010

IMPORTANT: After creating these files, use the vxedit command to change the ownership of
the raw volume files to oracle and the group membership to dba, and to change the permissions
to 660. Example:
# cd /dev/vx/rdsk/ops_dg
# vxedit -g ops_dg set user=oracle *
# vxedit -g ops_dg set group=dba *
# vxedit -g ops_dg set mode=660 *
The logical volumes are now available on the primary node, and the raw logical volume names
can now be used by the Oracle DBA.
Mirror Detachment Policies with CVM
The required CVM disk mirror detachment policy is "global", which means that as soon as one
node cannot see a specific mirror copy (plex), all nodes cannot see it as well. The alternate policy
is "local", which means that if one node cannot see a specific mirror copy, then CVM will deactivate
access to the volume for that node only.
This policy can be re-set on a disk group basis by using the vxedit command, as follows:
# vxedit set diskdetpolicy=global <DiskGroupName>
NOTE: The specific commands for creating mirrored and multipath storage using CVM are
described in the HP-UX documentation for the Veritas Volume Manager.
Using CVM 5.x
This section has information on how to prepare the cluster with CVM 5.x (on HP-UX releases
that support Veritas CFS and CVM). See “About Veritas CFS and CVM from Symantec” (page 18).
Preparing the Cluster for Use with CVM 5.x
To use the Veritas Cluster Volume Manager (CVM) version 5.x, the cluster must be running with
a special CVM package. This means that the cluster must already be configured and running
before you create disk groups.
NOTE: Cluster configuration is described in the previous section.
To prepare the cluster for CVM disk group configuration, you need to ensure that only one
heartbeat subnet is configured. Then use the following command, which creates the special
package that communicates cluster information to CVM:
# cmapplyconf -P /etc/cmcluster/cvm/VxVM-CVM-pkg.conf
WARNING! The above file should never be edited.
After the above command completes, start the cluster and create disk groups for shared use as
described in the following sections.
Starting the Cluster and Identifying the Master Node
Run the cluster, which will activate the special CVM package:
# cmruncl
After the cluster is started, it will now run with a special system multi-node package named
VxVM-CVM-pkg that is on all nodes. This package is shown in the following output of the
cmviewcl -v command:
96 Serviceguard Configuration for Oracle 9i RAC