Configuring Automatic Storage Management Using DBCA

You can also use DBCA to configure Automatic Storage Management (ASM) as a separate operation from creating a database. In this case, DBCA creates the ASM instance in its own Oracle home instead of using the Oracle home of a database. After you create the ASM instance and define disk groups, you can then perform a separate DBCA operation to create a database that uses those disk groups for storing database files. Creating an ASM instance in its own Oracle home is recommended, and has the advantage of enabling more than one Oracle database to use the ASM disk groups. This configuration differs from the configuration that you can choose with advanced installation as described in "Advanced Installation", in which you create a database, and as part of the database creation process, you create an ASM instance that uses the same Oracle home as the database. See the installation and platform guides for your environment for more information. For an overview of ASM, see Appendix A, "Administering Automatic Storage Management". For more detailed information, see Oracle Database Storage Administrator's Guide

To configure Automatic Storage Management using DBCA:

1. Configure Cluster Synchronization Services (CSS) by running the following command as the root user (UNIX and Linux) or as an administrative user (Windows):

   Oracle_home/bin/localconfig add
   

2. Start DBCA as described in "Starting DBCA".

3. In the Operations window, select Configure Automatic Storage Management, and then follow the guided workflow to create and start the ASM instance and create disk groups.