Enabling the clustering daemon for ASM-managed database
If your database is ASM-managed, then you must make sure that the Oracle clustering daemon is enabled in each node of the cluster. If the CSSD is not enabled, perform the following procedure.
To enable the clustering daemon for ASM-managed database
Log in as superuser.
Run the following command to configure and start the clustering daemon.
# $ORACLE_HOME/bin/localconfig add
Make sure the node has only one Oracle CSSD process running.