Replacing an Oracle Cluster Registry Location

If you must change an existing OCR location, or change a failed OCR location to a working location, then you can use the following procedure, if all remaining OCR locations remain online. The ocrconfig -replace command requires that at least two OCR locations are configured.

To change an Oracle Cluster Registry location:

Complete the following procedure:

Use the OCRCHECK utility to verify that a copy of OCR other than the one you are going to replace is online, using the following command:
```
$ ocrcheck
```
OCRCHECK displays all OCR locations that are registered and whether they are available (online). If an OCR location suddenly becomes unavailable, then it might take a short period for Oracle Clusterware to show the change in status.

Note:

The OCR location that you are replacing can be either online or offline.
Use the following command to verify that Oracle Clusterware is running on the node on which you are going to perform the replace operation:
```
$ crsctl check crs
```
Run the following command as root to replace the current OCR location using either destination_file or +ASM_disk_group to indicate the current and target OCR locations:
```
# ocrconfig -replace current_OCR_location -replacement new_OCR_location
```
The preceding command fails if you have less than two configured OCR locations that are online.

If you have only one OCR location configured and online, then you must first add a new location and then delete the failed location, as follows:
```
# ocrconfig -add new_OCR_location
# ocrconfig -delete current_OCR_location
```
Note:

If your cluster configuration changes while the node on which OCR resides is stopped, and the Oracle Clusterware stack is running on the other nodes, then OCR detects configuration changes and self-corrects the configuration by changing the contents of the ocr.loc file.

See Also:

Oracle Automatic Storage Management Administrator's Guide for more information about migrating storage