问题：
SQL> startup; ORACLE instance started. Total System Global Area 4999610368 bytes Fixed Size 8803024 bytes Variable Size 1040190768 bytes Database Buffers 3942645760 bytes Redo Buffers 7970816 bytes Database mounted. ORA-01157: cannot identify/lock data file 1 - see DBWR trace file ORA-01110: data file 1: '/oracle/lu8db/oradata/lu8db/system01.dbf' SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down.
恢复：
RMAN> startup mount; Oracle instance started database mounted Total System Global Area 4999610368 bytes Fixed Size 8803024 bytes Variable Size 1040190768 bytes Database Buffers 3942645760 bytes Redo Buffers 7970816 bytes RMAN> restore tablespace system; Starting restore at 2020-06-19 16:07:41 using target database control file instead of recovery catalog allocated channel: ORA_DISK_1 channel ORA_DISK_1: SID=135 device type=DISK allocated channel: ORA_DISK_2 channel ORA_DISK_2: SID=262 device type=DISK allocated channel: ORA_DISK_3 channel ORA_DISK_3: SID=379 device type=DISK allocated channel: ORA_DISK_4 channel ORA_DISK_4: SID=2 device type=DISK channel ORA_DISK_1: starting datafile backup set restore channel ORA_DISK_1: specifying datafile(s) to restore from backup set channel ORA_DISK_1: restoring datafile 00001 to /oracle/lu8db/oradata/lu8db/system01.dbf channel ORA_DISK_1: reading from backup piece /oracle/lu8db/12c/dbs/0ov35bqb_1_1 channel ORA_DISK_1: piece handle=/oracle/lu8db/12c/dbs/0ov35bqb_1_1 tag=TAG20200619T153746 channel ORA_DISK_1: restored backup piece 1 channel ORA_DISK_1: restore complete, elapsed time: 00:00:35 Finished restore at 2020-06-19 16:08:17 RMAN> recover tablespace system; Starting recover at 2020-06-19 16:10:45 using channel ORA_DISK_1 using channel ORA_DISK_2 using channel ORA_DISK_3 using channel ORA_DISK_4 starting media recovery archived log for thread 1 with sequence 4 is already on disk as file /oracle/lu8db/12c/dbs/arch1_4_1043341011.dbf archived log file name=/oracle/lu8db/12c/dbs/arch1_4_1043341011.dbf thread=1 sequence=4 media recovery complete, elapsed time: 00:00:00 Finished recover at 2020-06-19 16:10:46 RMAN> alter database open; Statement processed RMAN> alter pluggable database all open; Statement processed