Prior to the experiments to back up the database
RMAN>backup database;
5 delete data files in the operating system
SQL > the Startup ORACLE instance started. Area System, Ltd. Free Join Total 5060792320 bytes Fixed Size 2.28996 million bytes Variable Size 3.355447 billion bytes Database Buffers 1694498816 bytes Redo Buffers 8556544 bytes database loading is completed. ORA - 01157 : can not identify / lock data file 5 - See DBWR trace file ORA - 01110 : data file 5 : ' D: \ ORADATA \ USER_DATAFILES \ TS_CG01.DBF ' SQL> select status from v$instance; STATUS ------------ MOUNTED
Start a database error when using rman recovery tool:
The RMAN > List failure; using alternate target database control file recovery catalog database defect list ========================= failure detection time priority status summary ID - - ----- -------- ------- --------- ---------- 2242 HIGH the OPEN 17 - September - 19 missing one or more non-system data files the RMAN > SQL ' ALTER Database datafile. 5 Offline ' ; the RMAN > Restore datafile . 5 ; the RMAN > Recover datafile . 5 ; the RMAN > SQL ' ALTER Database Online datafile. 5';
Data file recovery is complete, restart the database without exception.