How to Restore ASM Based OCR After Complete Loss of the CRS Diskgroup on Linux/Unix Systems
Last updated on JULY 20, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168.0 and later
Information in this document applies to any platform.
It is not possible to directly restore a manual or automatic OCR backup if the OCR is located in an ASM disk group. This is caused by the fact that the command 'ocrconfig -restore' requires ASM to be up & running in order to restore an OCR backup to an ASM disk group. However, for ASM to be available, the CRS stack must have been successfully started. For the restore to succeed, the OCR also must not be in use (r/w), i.e. no CRS daemon must be running while the OCR is being restored.
A description of the general procedure to restore the OCR can be found in the documentation, this document explains how to recover from a complete loss of the ASM disk group that held the OCR and Voting files in a 11gR2 Grid environment.
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