The following are the actions of the High Availability resources:
Oracle ACFS resource
This resource attempts to unmount the file system. After the unmount has succeeded, the resource remounts the file system, making the file system available again. If processes are active on the file system during unmount, the resource identifies and terminates those processes.
Oracle ADVM resource
This resource attempts to disable any volume device, and then reenable the volume device. At that point, any configured Oracle ACFS resource can remount the file system. If processes are active on the volume during this period, the resource identifies and terminates the processes.