Explanation/Reference:
See step 2) below.
Restoring the Oracle Cluster Registry on Windows-Based Systems
Use the following procedure to restore the OCR on Windows-based systems:
1. Identify the OCR backups using the ocrconfig -showbackupcommand. Review the contents of the backup using ocrdump -backupfilefile_name where file_name is the name of the backup file.
2. On all of the remaining nodes, disable the following OCR clients and stop them using the Service Control Panel: OracleClusterVolumeService,OracleCSService, OracleCRService, and the OracleEVMService.
3. Execute the restore by applying an OCR backup file that you identified in Step 1 with the ocrconfig- restorefile name command. Make sure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid.
4. Start all of the services that were stopped in step 2. Restart all of the nodes and resume operations in cluster mode.
5. Run the following command to verify the OCR integrity where the -n allargument retrieves a listing of all of the cluster nodes that are configured as part of your cluster:
cluvfy comp ocr -n all [-verbose]
Note:
Restoring the Oracle Cluster Registry on UNIX-Based Systems
Use the following procedure to restore the OCR on UNIX-based systems:
1. Identify the OCR backups using the ocrconfig -showbackupcommand. Review the contents of the backup using ocrdump -backupfilefile_name where file_name is the name of the backup file.
2. Stop Oracle Clusterware on all the nodes in your Oracle RAC cluster by running the following command as root:
3. # crsctl stop crs
Repeat this command on each node in your Oracle RAC cluster.
Note:
Prior to running the crsctl start crscommand in step 4, run the following command to verify that all processes except init.cssd fatalare inactive:
ps -ef|grep cssd
4. Perform the restore by applying an OCR backup file that you identified in Step 1 using the following command where file_name is the name of the OCR that you want to restore. Make sure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid before running this command.
5. ocrconfig -restore file_name
6. Start Oracle Clusterware on all the nodes in your Oracle RAC cluster by running the following command as root:
7. # crsctl start crs
Repeat this command on each node in your Oracle RAC cluster.
8. Run the following command to verify the OCR integrity where the -n allargument retrieves a listing of all of the cluster nodes that are configured as part of your cluster:
9 . cluvfy comp ocr -n all [-verbose]
Reference: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide