Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

Troubleshooting ODM
This section discusses troubleshooting ODM.
File System configured incorrectly for ODM shuts down Oracle
Linking Oracle RAC with the Veritas ODM libraries provides the best file system
performance.
Review the instructions on creating the link and confirming that Oracle uses the
libraries. Shared file systems in RAC clusters without ODM libraries linked to
Oracle RAC may exhibit slow performance and are not supported.
If ODM cannot find the resources it needs to provide support for cluster file
systems, it does not allow Oracle to identify cluster files and causes Oracle to fail
at startup.
To verify cluster status, run the following command and review the output:
# cat /dev/odm/cluster
cluster status: enabled
If the status is "enabled," ODM is supporting cluster files. Any other cluster status
indicates that ODM is not supporting cluster files. Other possible values include:
ODM cannot yet communicate with its peers, but
anticipates being able to eventually.
pending
ODM cluster support has failed to initialize properly. Check
console logs.
failed
ODM is not supporting cluster files. If you think ODM
should be supporting the cluster files:
■ Make sure that the VRTSgms (group messaging service)
depot is installed.
Run the following command:
# swlist VRTSgms
■ Verify that the gms module is loaded:
# kcmodule -v vxgms
■ Restart ODM:
# /sbin/init.d/odm stop
# /sbin/init.d/odm start
disabled
Troubleshooting SF Oracle RAC
Troubleshooting ODM
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