Oracle Control File Corruption recovery

1. Use the trace file to restore

SQL> alter database backup controlfile to trace; -- back up the control file to the trace file

Database altered.
 
SQL> @ gettrace -- get the path of the trace file
 
TRACE_FILE_NAME
--------------------------------------------------------------------------------
/Oracle/app/admin/ora10g/udump/ora10g_ora_300000.trc
 
SQL>!
Oracle@www.bkjia.com ~ $ More/oracle/app/admin/ora10g/udump/ora10g_ora_300000.trc
 
/Oracle/app/admin/ora10g/udump/ora10g_ora_300000.trc
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Production
With the Partitioning, OLAP and Data Mining options
ORACLE_HOME =/oracle/app/oracle/product/10.2.0/db_1
System name: Linux
Node name: www.bkjia.com
Release: 2.6.18-164. el5
.
.
.
 
-- ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE
STARTUP NOMOUNT
Create controlfile reuse database "ORA10G" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/oradata/ora10g/redo01.log' SIZE 50 M,
GROUP 2'/oradata/ora10g/redo02.log 'SIZE 50 M,
GROUP 3 '/oradata/ora10g/redo03.log' SIZE 50 M
-- STANDBY LOGFILE
DATAFILE
'/Oradata/ora10g/system01.dbf ',
'/Oradata/ora10g/undotbs01.dbf ',
.
.
.
 
Alter tablespace temp add tempfile '/oradata/ora10g/temp01.dbf'
SIZE 20971520 reuse autoextend on next 655360 MAXSIZE 32767 M;
-- End of tempfile additions.
--
 
[Oracle@www.bkjia.com udump] $ cd
Oracle@www.bkjia.com ~ $ Vim recontro. SQL -- copy the useful statements in the trace file to recreate the control file. If no trace file has been backed up before, we can start from init {SID }. obtain the data file, log file, database tablespace, and other information in the ora file, and put init {SID }. the contents of the ora file are created in the following format:
 
STARTUP NOMOUNT
Create controlfile reuse database "ORA10G" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/oradata/ora10g/redo01.log' SIZE 50 M,
GROUP 2'/oradata/ora10g/redo02.log 'SIZE 50 M,
GROUP 3 '/oradata/ora10g/redo03.log' SIZE 50 M
DATAFILE
'/Oradata/ora10g/system01.dbf ',
'/Oradata/ora10g/undotbs01.dbf ',
'/Oradata/ora10g/sysaux01.dbf ',
'/Oradata/ora10g/users01.dbf'
Character set ZHS16GBK
;
Variable recno number;
EXECUTE: RECNO: = SYS. DBMS_BACKUP_RESTORE.SETCONFIG ('controlfile AUTOBACKUP ', 'off ');
RECOVER DATABASE
Alter system archive log all;
Alter database open;
SIZE 20971520 reuse autoextend on next 655360 MAXSIZE 32767 M;
STARTUP NOMOUNT
Create controlfile reuse database "ORA10G" RESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
# MAXLOGHISTORY 292
LOGFILE
GROUP 1'/oradata/ora10g/redo01.log' SIZE 50 M,
GROUP 2'/oradata/ora10g/redo02.log 'SIZE 50 M,
GROUP 3 '/oradata/ora10g/redo03.log' SIZE 50 M
DATAFILE
'/Oradata/ora10g/system01.dbf ',
'/Oradata/ora10g/undotbs01.dbf ',
'/Oradata/ora10g/sysaux01.dbf ',
'/Oradata/ora10g/users01.dbf'
Character set ZHS16GBK
;
Variable recno number;
EXECUTE: RECNO: = SYS. DBMS_BACKUP_RESTORE.SETCONFIG ('controlfile AUTOBACKUP ', 'off ');
RECOVER DATABASE USING BACKUP CONTROLFILE
Alter database open resetlogs;
SIZE 20971520 reuse autoextend on next 655360 MAXSIZE 32767 M;
"Recontro. SQL" 49L, 1641C written
Oracle@www.bkjia.com ~ $ Sqlplus/as sysdba
 
SQL * Plus: Release 10.2.0.1.0-Production on Tue Jul 19 03:30:34 2011
 
Copyright (c) 1982,200 5, Oracle. All rights reserved.
 
 
Connected:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-Production
With the Partitioning, OLAP and Data Mining options
 
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> set echo on -- enable display output
SQL> @ recontro -- use the script of the newly created refactoring control file to recreate the control file
SQL> STARTUP NOMOUNT
ORACLE instance started.
 
Total System Global Area 209715200 bytes
Fixed Size 1218556 bytes
Variable Size 75499524 bytes
Database Buffers 130023424 bytes
Redo Buffers 2973696 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "ORA10G" NORESETLOGS ARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7. LOGFILE
8 GROUP 1'/oradata/ora10g/redo01.log' SIZE 50 M,
9 GROUP 2'/oradata/ora10g/redo02.log 'SIZE 50 M,
10 GROUP 3'/oradata/ora10g/redo03.log' SIZE 50 M
11 DATAFILE
12'/oradata/ora10g/system01.dbf ',
13 '/oradata/ora10g/undotbs01.dbf ',
14'/oradata/ora10g/sysaux01.dbf ',
15'/oradata/ora10g/users01.dbf'
16 character set ZHS16GBK
17;
 
Control file created.
 
SQL> VARIABLE RECNO NUMBER;
SQL> EXECUTE: RECNO: = SYS. DBMS_BACKUP_RESTORE.SETCONFIG ('controlfile AUTOBACKUP ', 'off ');
 
PL/SQL procedure successfully completed.
 
SQL> RECOVER DATABASE
 
SQL> ALTER SYSTEM ARCHIVE LOG ALL;
 
System altered.
 
SQL> ALTER DATABASE OPEN;
 
Database altered.
 
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '/oradata/ora10g/temp01.dbf'
2 SIZE 20971520 reuse autoextend on next 655360 MAXSIZE 32767 M;
 
Tablespace altered.
 
SQL> STARTUP NOMOUNT
ORA-01081: cannot start already-running ORACLE-shut it down first
SQL> CREATE CONTROLFILE REUSE DATABASE "ORA10G" RESETLOGS ARCHIVELOG
2 MAXLOGFILES 16
3 MAXLOGMEMBERS 3
4 MAXDATAFILES 100
5 MAXINSTANCES 8
6 MAXLOGHISTORY 292
7. LOGFILE
8 GROUP 1'/oradata/ora10g/redo01.log' SIZE 50 M,
9 GROUP 2'/oradata/ora10g/redo02.log 'SIZE 50 M,
10 GROUP 3'/oradata/ora10g/redo03.log' SIZE 50 M
11 DATAFILE
12'/oradata/ora10g/system01.dbf ',
13 '/oradata/ora10g/undotbs01.dbf ',
14'/oradata/ora10g/sysaux01.dbf ',
15'/oradata/ora10g/users01.dbf'
16 character set ZHS16GBK
17;
Create controlfile reuse database "ORA10G" RESETLOGS ARCHIVELOG
 
SQL> VARIABLE RECNO NUMBER;
SQL> EXECUTE: RECNO: = SYS. DBMS_BACKUP_RESTORE.SETCONFIG ('controlfile AUTOBACKUP ', 'off ');
 
PL/SQL procedure successfully completed.
 
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE
 
SQL> ALTER DATABASE OPEN RESETLOGS;
 
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '/oradata/ora10g/temp01.dbf'
2 SIZE 20971520 reuse autoextend on next 655360 MAXSIZE 32767 M;
Alter tablespace temp add tempfile '/oradata/ora10g/temp01.dbf'
 
Tablespace altered.
SQL> select open_mode from v $ database;
 
OPEN_MODE
----------
READ WRITE