You can be stop Oracle ACFS file system resources with the following methods:
You can stop the entire Oracle Clusterware stack. When the Oracle Clusterware stack is stopped, all Oracle ACFS resources are automatically stopped.
To stop individual resources, you can use SRVCTL management commands with the filesystem or volume object. The command may require the -force option if there are other resources that are depending on the resource that you are attempting to stop.
You may engage a manual action, such as running unmount on a file system or by manually stopping a volume using ASMCMD or SQL*Plus commands. In this case, the Oracle ACFS resource transitions to the OFFLINE state automatically.