由于rman并不备份在线日志文件，刚才的rman只是做了个全库备份和控制文件的备份，可以看到redo01.log，redo02.log，redo03.log这3个文件并不存在
[oracle@ora10g ~]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Aug 26 14:52:35 2014
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> select open_mode from v$database;
OPEN_MODE
----------
MOUNTED
SQL> col member for a60
SQL> select group#,member from v$logfile;
GROUP# MEMBER
---------- ------------------------------------------------------------
3 /u01/app/oracle/oradata/ora10g/redo03.log
2 /u01/app/oracle/oradata/ora10g/redo02.log
1 /u01/app/oracle/oradata/ora10g/redo01.log
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '/u01/app/oracle/oradata/ora10g/system01.dbf'
由于只是restore了数据库，还未recover，数据库是无法打开的
SQL> recover database
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> recover database until cancel;
ORA-00283: recovery session canceled due to errors
ORA-01610: recovery using the BACKUP CONTROLFILE option must be done
SQL> recover database using backup controlfile;
ORA-00279: change 502729 generated at 08/26/2014 15:36:54 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_3_%u_.arc
ORA-00280: change 502729 for thread 1 is in sequence #3
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
auto
ORA-00308: cannot open archived log
'/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_3_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
ORA-00308: cannot open archived log
'/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_3_%u_.arc'
ORA-27037: unable to obtain file status
Linux Error: 2: No such file or directory
Additional information: 3
SQL> recover database using backup controlfile until cancel;
ORA-00279: change 502729 generated at 08/26/2014 15:36:54 needed for thread 1
ORA-00289: suggestion :
/u01/app/oracle/flash_recovery_area/ORA10G/archivelog/2014_08_26/o1_mf_1_3_%u_.arc
ORA-00280: change 502729 for thread 1 is in sequence #3
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
Media recovery cancelled.
SQL>
由于之前的归档没有用rman备份，而现在也不存在了，无法recover数据库，就算用resetlogs也无法open数据库。此时，只有通过隐含参数_allow_resetlogs_corruption来open数据库了
SQL> show parameter spfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
spfile string /u01/app/oracle/product/10.2.0
/db_1/dbs/spfileora10g.ora
--创建pfile
SQL> create pfile from spfile;
File created.
--编辑$ORACLE_HOME/dbs/initora10g.ora初始化参数文件，在文件末尾添加*._allow_resetlogs_corruption = true
[oracle@ora10g ora10g]$ vi $ORACLE_HOME/dbs/initora10g.ora
ora10g.__db_cache_size=180355072
ora10g.__java_pool_size=4194304
ora10g.__large_pool_size=4194304
ora10g.__shared_pool_size=92274688
ora10g.__streams_pool_size=0
*.audit_file_dest='/u01/app/oracle/admin/ora10g/adump'
*.background_dump_dest='/u01/app/oracle/admin/ora10g/bdump'
*.compatible='10.2.0.1.0'
*.control_files='/u01/app/oracle/oradata/ora10g/control01.ctl','/u01/app/oracle/oradata/ora10g/control02.ctl','/u01/app/oracle/oradata/ora10g/control03.ctl'#Restore Controlfile
*.core_dump_dest='/u01/app/oracle/admin/ora10g/cdump'
*.db_block_size=8192
*.db_domain=''
*.db_file_multiblock_read_count=16
*.db_name='ora10g'
*.db_recovery_file_dest='/u01/app/oracle/flash_recovery_area'
*.db_recovery_file_dest_size=2147483648
*.dispatchers='(PROTOCOL=TCP) (SERVICE=ora10gXDB)'
*.job_queue_processes=10
*.log_archive_format='%t_%s_%r.dbf'
*.nls_language='SIMPLIFIED CHINESE'
*.nls_territory='CHINA'
*.open_cursors=300
*.pga_aggregate_target=94371840
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sga_target=285212672
*.undo_management='AUTO'
*.undo_tablespace='UNDOTBS1'
*.user_dump_dest='/u01/app/oracle/admin/ora10g/udump'
*._allow_resetlogs_corruption=TRUE
--关闭数据库实例，用pfile启动
SQL> shutdown immediate
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> startup pfile=$ORACLE_HOME/dbs/initora10g.ora
ORACLE instance started.