Wrong
Mis-:file #483 added to control file as ' UNNAMED00483 ' becausethe Parameter standby_file_management is set to manualthe file should be manually created to continue. errors with log +fra/cweolb/archivelog/2015_08_02/thread_1_seq_225515.7695.886664431mrp0: Background media recovery terminated with error 1274errors in file /oracle/orabase/admin/CWEOLB/diag/rdbms/cweolb/CWEOLB/trace/CWEOLB_pr00_19398846.trc:ORA-01274: cannot add datafile ' +data/cweol/datafile/tstlog.2015080201 ' - file could not be createdmanaged standby recovery not using real time applyrecovery interrupted! Sun aug 02 21:55:44 2015recovered data files to a consistent state at change 61278149367sun aug 02 21:55:44 2015mrp0: background media recovery process shutdown ( Cweolb) mon aug 03 10:57:23 2015alter system set standby_file_management= ' AUTO ' SCOPE=BOTH; Mon aug 03 10:58:29 2015 alter database recover managed standby database using current logfile disconnect from sessionattempt to start background Managed Standby Recovery process (Cweolb) Sun aug  02 21:58:29 2015MRP0 STARTED WITH PID=38, OS ID=7733714 MRP0: Background Managed Standby Recovery process started (Cweolb) started logmerger processsun aug 02 21:58:34 2015managed standby recovery starting Real Time ApplySun Aug 02 21:58:34 2015Errors in file /oracle/orabase/admin/cweolb/diag/rdbms/cweolb/cweolb/trace/cweolb_dbw0_9896432.trc:ora-01186: file 483 failed verification testsora-01157: cannot identify/lock data file 483 - see dbwr trace fileora-01111: name for data file 483 is unknown - rename to correct fileora-01110: data file 483: '/oracle/orabase/ora11gr2/dbs/unnamed00483 ' file 483 not verified due to error ora-01157mrp0: background media recovery terminated with error 1111errors in file /oracle/orabase/admin/cweolb/diag/rdbms/cweolb/cweolb/trace/ cweolb_pr00_20250790.trc:ora-01111: name for data file 483 is unknown - rename to correct fileora-01110: data file 483: '/oracle/orabase/ ora11gr2/dbs/unnamed00483 ' ORA-01157: cannot identify/lock data file 483 - see dbwr trace Fileora-01111: name for data file 483 is unknown - rename to correct fileORA-01110: data file 483: '/oracle/orabase/ora11gr2/dbs/ UNNAMED00483 ' managed standby recovery not using real time applyslave exiting with ora-1111 exceptionerrors in file /oracle/orabase/admin/cweolb/diag/ rdbms/cweolb/cweolb/trace/cweolb_pr00_20250790.trc:ora-01111: name for data file 483 is unknown - rename to correct fileora-01110: data file 483 : '/oracle/orabase/ora11gr2/dbs/unnamed00483 ' ora-01157: cannot identify/lock data File 483 - see dbwr trace fileora-01111: name for data file 483 is unknown - rename to correct fileORA-01110: data file 483: '/oracle/ orabase/ora11gr2/dbs/unnamed00483 ' recovery slave pr00 previously exited with exception 1111mrp0: background media recovery process shutdown (CWEOLB) Completed: alter database recover managed standby database using current logfile disconnect from sessionMon Aug 03 11:03:03 2015alter database recover managed standby database using current logfile disconnect from sessionattempt to start background managed standby recovery process (Cweolb) sun aug 02 22:03:03 2015mrp0 started with pid=38, OS id=16253320 MRP0: Background Managed Standby recovery process started (CWEOLB) started logmerger processsun aug 02 22:03:08 2015managed standby recovery starting real time applysun aug 02 22:03:08 2015errors in file /oracle/orabase/admin/cweolb/diag/rdbms/cweolb/cweolb/trace/cweolb_dbw0_9896432.trc:o Ra-01186: file 483 failed verification testsora-01157: cannot identify/lock data file 483 - see dbwr trace fileora-01111: name for  DATA FILE 483 IS UNKNOWN - RENAME TO CORRECT FILEORA-01110: data file 483: '/oracle/orabase/ora11gr2/dbs/unnamed00483 ' file 483 not verified due to error ora-01157mrp0: background media recovery Terminated with error 1111errors in file /oracle/orabase/admin/cweolb/diag/rdbms /cweolb/cweolb/trace/cweolb_pr00_19661014.trc:ora-01111: name for data file 483 is unknown - rename to correct fileORA-01110: data file 483: '/oracle/orabase/ ora11gr2/dbs/unnamed00483 ' ora-01157: cannot identify/lock data file 483 - see dbwr trace fileora-01111: name for data file 483 is unknown - rename to correct fileora-01110: data file 483: '/ oracle/orabase/ora11gr2/dbs/unnamed00483 ' Managed standby recovery not using real time applyslave exiting with ora-1111 exceptionerrors in file / oracle/orabase/admin/cweolb/diag/rdbms/cweolb/cweolb/trace/cweolb_pr00_19661014.trc:ora-01111: name for data file 483 is unknown - rename to correct Fileora-01110: data file 483:&nBSP; ' /oracle/orabase/ora11gr2/dbs/unnamed00483 ' ora-01157: cannot identify/lock data file 483 - see dbwr trace fileora-01111: name for data file 483 is unknown - rename to correct fileora-01110: data file 483 : '/oracle/orabase/ora11gr2/dbs/unnamed00483 ' recovery slave pr00 previously exited with exception 1111mrp0: background media recovery process shutdown (CWEOLB) completed: alter database recover managed standby database Using current logfile disconnect from session
Workaround:
ALTER SYSTEM SET standby_file_management= ' MANUAL ' Scope=both; sql> ALTER DATABASE Create DataFile '/oracle/orabase/ora11gr2/dbs/unnamed00483 ' as ' +data/cweolb/datafile/ tstlog.2015080201 ';D atabase altered.alter database recover managed standby database using current logfile disconnect from Session
DATAGUARD ORA-01274 ORA-01111 Treatment