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How to efficiently recover from a loss of an Oracle ASM disk group containing the Oracle Clusterware files?

April 26, 2017asm clusterware containing disk efficiently files group loss Oracle recover

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How to efficiently recover from a loss of an Oracle ASM disk group containing the Oracle Clusterware files?

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If an Oracle ASM disk group containing Oracle database data and the Oracle Clusterware files is lost completely, the system needs to be restored starting with the restore of the Oracle Clusterware files affected. Note: Oracle recommends to have two disk groups as a standard deployment scenario: the database data containing disk group (commonly referred to as the DATA disk group) and the backup data containing disk group (commonly referred to as the FRA disk group).In this configuration, the Oracle Voting Files(s) and the first Oracle Cluster Registry (OCR) location should share the same disk group as the Oracle Database data, here the DATA disk group. A second OCR location should be placed into the second disk group, here FRA, using “ocrconfig -add +FRA” as root, while the cluster is running. A complete failure of the FRA disk group would be without effect for the overall cluster operation in this case. A complete failure of the DATA disk group instead will require a restore of the Ora