The restoration of RAC when the OCR disk is faulty and there is a backup, racocr
Problem description:
CRS startup failed, and all RAC processes quit.
View the messages log:
......
Apr 10 15:58:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7510.
Apr 10 15:58:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.4244.
Apr 10 15:58:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7174.
Apr 10 15:59:31 node74 su: (to oracle) root on none
Apr 10 15:59:31 node74 su: (to oracle) root on none
Apr 10 15:59:31 node74 su: (to oracle) root on none
Apr 10 15:59:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7510.
Apr 10 15:59:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7174.
Apr 10 15:59:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.4244.
Apr 10 16:00:26 node74su: (to oracle) root on/dev/pts/0
Apr 10 16:00:31 node74 su: (to oracle) root on none
Apr 10 16:00:31 node74 su: (to oracle) root on none
Apr 10 16:00:31 node74 su: (to oracle) root on none
Apr 10 16:00:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.4244.
Apr 10 16:00:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7510.
Apr 10 16:00:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in/tmp/crsctl.7174.
......
Take one of the files,/tmp/crsctl.7174:
Oracle Cluster Registry initialization failed with invalid format: The OCR backend has an invalid format
It is suspected that OCR is damaged. Run the crsctl check boot command, which is consistent with the preceding log error:
Oracle @ node74: ~> Crsctl check boot
Oracle Cluster Registry initialization failed with invalid format: The OCR backend has an invalid format
Troubleshooting:
Check whether there is an OCR automatic backup. Unfortunately, there is no result output:
Oracle @ node74: ~> Ocrconfig-showbackup
--- Null
Fortunately, there was a manual backup for OCR during the OCR migration experiment.
Node74:/home/database/oracle/Hangzhou RS/bin # ll/home/oracle/ocr. exp
-Rw-r -- 1 root 87246 Dec 29 16:45/home/oracle/ocr. exp
Import the pre-Backup OCR:
Node74:/home/database/oracle/Hangzhou RS/bin #./ocrconfig-import/home/oracle/ocr. exp
Check OCR:
Node74:/home/database/oracle/javasrs/bin #./ocrcheck
Status of Oracle Cluster Registry is as follows:
Version: 2
Total space (kbytes): 975584
Used space (kbytes): 3844
Available space (kbytes): 971740
ID: 811637621
Device/File Name:/dev/raw/raw1
Device/File integrity check succeeded
Device/File not configured
Cluster registry integrity check succeeded
Logical upload uption check succeeded
--- Repair successful
Start CRS:
Node74:/home/database/oracle/clustered RS/bin #/etc/init. d/init. crs start
All RAC processes started successfully:
Node74 :~ # Su-oracle
Oracle @ node74: ~> Crs_stat-t
Name Type Target State Host
------------------------------------------------------------
Ora... SM1.asm application ONLINE node74
Ora... 74. lsnr application ONLINE node74
Ora. node74.gsd application ONLINE node74
Ora. node74.ons application ONLINE node74
Ora. node74.vip application ONLINE node74
Ora... SM2.asm application ONLINE node76
Ora... 76. lsnr application ONLINE node76
Ora. node76.gsd application ONLINE node76
Ora. node76.ons application ONLINE node76
Ora. node76.vip application ONLINE node76
Ora. orcl. db application ONLINE node74
Ora... l1.inst application ONLINE node74
Ora... l2.inst application ONLINE node76
-- Problem Solving
