CONTROL FILE

ALTER DATABASE BACKUP CONTROL FILE TO TRACE

BACKUP CURRENT CONTROLFILE FOR STANDBY FORMAT '/flashback/drlag/ForStandby_controlfile_%U';

RESTORE STANDBY CONTROLFILE from '/flashback/drlag/ForStandby_controlfile_k9nd7g8o_1_1';

ALTER DATABASE CREATE STANDBY CONTROLFILE AS '/tmp/boston.ctl';