There are different configuration processes you must perform when installing and create an Oracle RAC database that uses Direct NFS (dNFS) for the database files.
Use ASMCA to Configure an ACFS Mount Point
Oracle Automatic Storage Management Configuration Assistant (ASMCA) enables you to create an Oracle Automatic Storage Management Cluster File System (Oracle ACFS) mount point which is used in the "common file location" step of Oracle Database Configuration Assistant (DBCA).
Enable and Configure Direct NFS
You must manually enable the Direct NFS option after installing the Oracle Database software.
Use ASMCA to Remove the ACFS Mount Point
Now you have configured the mount point using Direct NFS, you can remove the Oracle Automatic Storage Management Cluster File System (Oracle ACFS) mount point using Oracle Automatic Storage Management Configuration Assistant (ASMCA).