Before we shut down ASM instance it is important to dismount acfs file system , Once it is dismounted all open references to Oracle ASM files are removed .

If ACFS file system is active and ASM instance is forcibly shut down , acfs file system will be placed in offline error state.If any file systems are currently mounted on Oracle ADVM volume files, the SHUTDOWN ABORT command should not be used to terminate the Oracle ASM instance without first dismounting those file systems.

Steps to mount acfs file system :

Step 1 : Enable volume from asmcmd :

We can see here it is in disabled state

Step 2 : Mount it using /bin/mount :

To unmount acfs file system :

Stay tuned for More articles on Oracle RAC

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