Oracle 11gR2 rac dbca cannot recognize ASM disk groups

Original environment: AIX6.1 and Oracle CRS 11g R2 without DB soft.

You need to install a new database and INSTANCE, and prepare to test, upgrade, and install PSU 11.2.0.3.2. During the DBCA process, the ASM disk cannot be identified. The solution is as follows:

Two nodes are analyzed and executed:

Su-grid

Cd $ GRID_HOME/bin

Chmod + s oracle

Chmod + s meaning:

To facilitate normal users to execute some privileged commands, the SUID/SGID program allows normal users to temporarily execute the program as root and resume their identities after the execution is complete. Chmod + s gives suid permission to a program or script.

The cause of this situation is generally:

After Grid Infrastructure and Database are installed, the owner of the installation directory may change to root. do not modify the owner of the installation directory or modify the permissions of the Directory and its files when you reinstall or upgrade it. If the owner is modified, for example, after the directory owner is changed from root: oinstall to grid: oinstall, or the read and write permissions of the Directory and its files are changed to 777, this may cause dbca to fail to find the previously created ASM disk when creating a database.

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