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11g r2 模拟OCR和voting disk不可用，完整恢复过程，以及一些注意事项
1：查看ORC和voting disk信息：In 11g Release 2 your voting disk data is automatically backed up in the OCR whenever there is a configuration change.所以恢复时恢复备份OCR即可，这里和10g是不同的，不需要备份voting disk，备份OCR即可2：使用cluvfy 工具检查OCR完整性[grid@rac1 ~]$ cluvfy comp oc...
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Oracle RAC执行root.sh报错：Failed to create keys in the OLR, rc = 127, Message:
[root@rac2 rpm]# /u01/app/oraInventory/orainstRoot.shChanging permissions of /u01/app/oraInventory.Adding read,write permissions for group.Removing read,write,execute permissions for world.Changing groupname of /u01/app/oraInventory to oinstall.The execution of the script is complete.[root@r...
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11g RAC使用UDEV挂载磁盘（metalink截取部分）
Real Application Clusters (RAC) requires special ownership (owner, group and permissions) for the OCR (Oracle Cluster Registry) and Voting devices on Linux.In the 2.6 kernel, the UDEV system is the default method through which the kernel controls the creation of the special files that represent ...
