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How to Replace a Corrupt OCR Mirror File (Device/File Needs To Be Synchronized With The Other Device) (Doc ID 317628.1)

Last updated on NOVEMBER 06, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.


From Oracle Database 10g Release 2 (10.2) Oracle Clusterware provides the creation of a mirrored Oracle Cluster Registry (OCR) file, enhancing cluster reliability. From 11.2 onwards, upto 4 OCR mirror can be created.

The ocrconfig command, used to perform OCR configuration operations, has the new option to add, replace and remove the OCR file and its mirror copy:

ocrconfig -replace ocr|ocrmirror [<filename>]

In this article we will show how to use the good OCR copy to replace the corrupt mirror copy and how to workaround the potential PROT-22 error during that operation.


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