Last week I published a new video on OCR and OLR commands.
ocrcheck : Lists the locations of the OCR and checks for corruption (run as root to check for logical corruption as well)
ocrconfig -add DG Name (e.g. ocrconfig -add +DATA) : Adds a new copy of the OCR in the stated ASM DG
ocrconfig -delete DG Name : Deletes a copy of the OCR from the ASM DG
cat /etc/oracle/olr.loc : Shows the location of the OLR
ocrcheck -local : Checks the OLR
ocrconfig -showbackup : Shows the default location of OCR backups
ocrconfig -manualbackup : Create a manual backup of the OCR
(use asmcmd to copy the backup out from ASM to Filesystem)
ocrconfig -local -showbackuploc : Shows the location of OLR backups
ocrconfig -local -manualbackup : Create a manual backup of the OLR
ocrconfig -local -export : Create an Export backup of the OLR
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