Restore OCR from Backup
Connect as root and from the OCR backup directory choose the last backup before the problem started
[root@vmractest1]# cd /vmasmtest/BACKUP/OCR/
[root@vmractest1]# ls -ltr
total 458328
-rw-r--r-- 1 oracle dba 156279808 Nov 21 16:48 OCR_21_nov_06_backup1
-rw-r--r-- 1 oracle dba 156279808 May 3 16:39 OCR_03_may_07
-rw-r--r-- 1 oracle dba 156279808 May 16 16:06 OCR_16_may_07_small
Restore the last backup using the dd command
[root@vmractest1]# dd if=/vmasmtest/BACKUP/OCR/OCR_03_may_07 of=/dev/raw/ocr.dbf
305234+0 records in
305234+0 records out
OCR.LOC
used by ASM to start CSS daemon
/var/opt/oracle on Sun Solaris
/etc/oracle on RHEL
$ cat ocr.loc
ocrconfig_loc=/dev/asmdisk/ocr1 <-specifies the location of the Oracle Cluster Registry (OCR) used by the CSS daemon
ocrmirrorconfig_loc=/dev/asmdisk/ocr2
local_only=FALSE
OCR
$ ocrconfig –option
$ ocrcheck
$ ocrconfig -showbackup
$ ocrconfig –export myfile
$ ocrdump -backupfile my-file
$ ocrconfig –restore my_file
$ cluvfy comp ocr –n all -verbose #check OCR integrity
$ ocrconfig -replace ocr destination_file or disk
$ ocrconfig -replace ocrmirror destination_file or disk
# ../bin/crs stop
