當前控制文件損壞_不完全恢復_用控制文件二進制備份_數據不丟_不需備份

當前控制文件損壞_不完全恢復_用控制文件二進制備份_數據不丟_不需備份

---------------當前控制文件損壞_不完全恢復_用控制文件二進制備份_數據不丟_不需備份----------------

[oracle@station ~]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 8 12:33:28 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected.
SQL> create table hr.strom (a number) tablespace users;

Table created.

SQL> alter system switch logfile;

System altered.

SQL> insert into hr.strom values(1);

1 row created.

SQL> alter system switch logfile;

System altered.

SQL> commit;

Commit complete.

SQL> insert into hr.strom values(2);

1 row created.

SQL> alter system switch logfile;

System altered.

SQL> commit;

Commit complete.

SQL> insert into hr.strom values(3);

1 row created.

SQL> commit;

Commit complete.

RMAN> backup current controlfile;                                        -----備份控制文件

Starting backup at 08-JUN-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=158 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
channel ORA_DISK_1: starting piece 1 at 08-JUN-12
channel ORA_DISK_1: finished piece 1 at 08-JUN-12
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2012_06_08/o1_mf_ncnnf_TAG20120608T123941_7x4bpgks_.bkp tag=TAG20120608T123941 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
Finished backup at 08-JUN-12

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 8 12:44:36 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.

Total System Global Area  281018368 bytes
Fixed Size                  2020192 bytes
Variable Size             130026656 bytes
Database Buffers          146800640 bytes
Redo Buffers                2170880 bytes
ORA-00205: error in identifying control file, check alert log for more info                          -----表示控制文件丟失

通過RMAN備份的控制文件進行恢復，但是rman要進入mount的狀態下才能進行恢復，我們可以在backupset文件下找到控制文件的備份片進行恢復，
我這裏只有一個文件在生產環境中有很多備份片，可以看它的大小一般控制文件都是6-7MB以內。

[oracle@station 2012_06_08]$ cd /u01/app/oracle/flash_recovery_area/ORCL/backupset/2012_06_08/
[oracle@station 2012_06_08]$ ls -l
total 6956
-rw-r----- 1 oracle oinstall 7110656 Jun  8 12:39 o1_mf_ncnnf_TAG20120608T123941_7x4bpgks_.bkp
[oracle@station 2012_06_08]$ du -h *
6.8M    o1_mf_ncnnf_TAG20120608T123941_7x4bpgks_.bkp

[oracle@station ~]$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Fri Jun 8 12:57:22 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database: orcl (not mounted)

RMAN> list backup of controlfile;                                          在nomount查看不到備份的內容

using target database control file instead of recovery catalog
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of list command at 06/08/2012 12:58:41
ORA-01507: database not mounted                                           

RMAN> quit

找到備份片現在通過RMAN進行恢復控制文件。

Recovery Manager: Release 10.2.0.1.0 - Production on Fri Jun 8 13:00:55 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database: orcl (not mounted)

RMAN> restore controlfile from '/u01/app/oracle/flash_recovery_area/ORCL/backupset/2012_06_08/o1_mf_ncnnf_TAG20120608T123941_7x4bpgks_.bkp';

Starting restore at 08-JUN-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=155 devtype=DISK

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:05
output filename=/u01/app/oracle/oradata/ORCL/controlfile/o1_mf_7x4d0ssc_.ctl
output filename=/u01/app/oracle/flash_recovery_area/ORCL/controlfile/o1_mf_7x4d0t9h_.ctl
Finished restore at 08-JUN-12

RMAN> run { alter database mount;                            ----這裏用run語法進行恢復
2> recover database;
3> }

database mounted
released channel: ORA_DISK_1

Starting recover at 08-JUN-12
Starting implicit crosscheck backup at 08-JUN-12
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=155 devtype=DISK
Finished implicit crosscheck backup at 08-JUN-12

Starting implicit crosscheck copy at 08-JUN-12
using channel ORA_DISK_1
Finished implicit crosscheck copy at 08-JUN-12

searching for all files in the recovery area
cataloging files...
cataloging done

List of Cataloged Files
=======================
File Name: /u01/app/oracle/flash_recovery_area/ORCL/backupset/2012_06_08/o1_mf_ncnnf_TAG20120608T123941_7x4bpgks_.bkp

using channel ORA_DISK_1

starting media recovery

archive log thread 1 sequence 22 is already on disk as file /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_3_7wntksjg_.log
archive log filename=/u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_3_7wntksjg_.log thread=1 sequence=22
media recovery complete, elapsed time: 00:00:00
Finished recover at 08-JUN-12

RMAN> quit

Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
[oracle@station 2012_06_08]$ conn /as sysdba
bash: conn: command not found
[oracle@station 2012_06_08]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jun 8 13:08:35 2012

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

SQL> conn /as sysdba
Connected.
SQL> alter database open;                                                                  ---注意：在上面只啓動到mount的狀態。
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open

SQL> alter database open resetlogs;

Database altered.

SQL> select * from hr.strom;

         A
----------
         1
         2
         3

---------------當前控制文件損壞_不完全恢復_用控制文件二進制備份_數據不丟_不需備份----------------