问题描述：
CRS启动失败，并且RAC进程全部退出。
查看messages日志：… …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.7264.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 noneApr 10 15:59:31 node74 su: (to oracle) root on noneApr 10 15:59:31 node74 su: (to oracle) root on noneApr 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.7264.Apr 10 16:00:26 node74 su: (to oracle) root on /dev/pts/0Apr 10 16:00:31 node74 su: (to oracle) root on noneApr 10 16:00:31 node74 su: (to oracle) root on noneApr 10 16:00:31 node74 su: (to oracle) root on noneApr 10 16:00:31 node74 logger: Cluster Ready Services waiting on dependencies. Diagnostics in /tmp/crsctl.7264.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…. …
取其中一个文件下来，/tmp/crsctl.7174：
Oracle Cluster Registry initialization failed with invalid format: PROC-22: The OCR backend has an invalid format怀疑是OCR损坏。运行crsctl check boot命令，与上面的日志报错是一致的：oracle@node74:~> crsctl check bootOracle Cluster Registry initialization failed with invalid format: PROC-22: The OCR backend has an invalid format
问题处理：
查看是否有OCR自动备份，很不幸，，没有结果输出：
oracle@node74:~> ocrconfig -showbackup—空
幸好之前做OCR迁移实验时，有做过OCR的手动备份。
node74:/home/database/oracle/oracrs/bin # ll /home/oracle/ocr.exp-rw-r–r– 1 root root 87246 Dec 29 16:45 /home/oracle/ocr.exp
导入之前备份的OCR：
node74:/home/database/oracle/oracrs/bin # ./ocrconfig -import /home/oracle/ocr.exp
检查OCR：
node74:/home/database/oracle/oracrs/bin # ./ocrcheckStatus 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 corruption check succeeded
—修复成功
启动CRS：
node74:/home/database/oracle/oracrs/bin # /etc/init.d/init.crs start
所有RAC进程启动成功：
node74:~ # su – oracleoracle@node74:~> crs_stat -tName Type Target State Host ————————————————————ora….SM1.asm application ONLINE ONLINE node74 ora….74.lsnr application ONLINE ONLINE node74 ora.node74.gsd application ONLINE ONLINE node74 ora.node74.ons application ONLINE ONLINE node74 ora.node74.vip application ONLINE ONLINE node74 ora….SM2.asm application ONLINE ONLINE node76 ora….76.lsnr application ONLINE ONLINE node76 ora.node76.gsd application ONLINE ONLINE node76 ora.node76.ons application ONLINE ONLINE node76 ora.node76.vip application ONLINE ONLINE node76 ora.orcl.db application ONLINE ONLINE node74 ora….l1.inst application ONLINE ONLINE node74
ora….l2.inst application ONLINE ONLINE node76
–问题解决
人生的小河，总要流过森林，荒漠，
