If you disable a service, then Oracle Clusterware does not consider the service for automatic startup, failover, or restart. You might disable a service when performing application maintenance, to ensure the service is not accidentally restarted by Oracle Clusterware until your maintenance operations are complete. To make the service available for normal operation again, you enable the service.
Use the following SRVCTL syntax from the command line to enable and disable services:
$ srvctl enable service -db db_unique_name -service service_name_list [-instance inst_name]
$ srvctl disable service -db db_unique_name -service service_name_list [-instance inst_name]