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File system configured incorrectly for ODM shuts down Oracle

Linking Oracle9i 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 Oracle9i may exhibit slow performance and are not supported.

See Relinking the SF Oracle RAC libraries to Oracle9i

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. Run the following command:

# 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:

 

pending 

ODM cannot yet communicate with its peers, but anticipates being able to eventually. 

failed 

ODM cluster support has failed to initialize properly. Check console logs. 

disabled 

ODM is not supporting cluster files. If you think it should, check: 

  • /dev/odm mount options in /etc/vfstab. If the "nocluster" option is being used, it can force the "disabled" cluster support state.
  • Make sure the VRTSgms (group messaging service) package is installed. Run the following command:

    # /opt/VRTSvcs/bin/chk_dback_pkgs

    The utility reports any missing required packages.

If /dev/odm is not mounted, no status can be reported.


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