SYNTAX FOR REMOVING INSTANCE --- srvctl remove instance -d DB_UNIQUE_NAME -i INSTANCE_NAME e.g srvctl remove instance -d PRODB - I PRODB1 SYNTAX FOR ADDING INSTANCE --- srvctl add instance –d db_unique_name –i inst_name -n node_name e.g srvctl add instance -d PRODB - i PRODB1 -n rachost1