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.

• Performing a Software-Only Installation of Oracle Database
  In a software-only installation you install the Oracle Database software but do not create a database as part of the installation process.
• Using Oracle ASMCA to Configure an ACFS Mount Point
  Oracle Automatic Storage Management Configuration Assistant (Oracle 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).
• Using Oracle DBCA to Create and Configure the Oracle RAC Database
  Use Oracle Database Configuration Assistant (DBCA) to create an Oracle Real Application Clusters (Oracle RAC) database that uses Direct NFS for datafile storage.
• Enabling and Configuring Direct NFS
  You must manually enable the Direct NFS option after installing the Oracle Database software.
• Using Oracle 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).