Datafiles and control file corrupted

I have oracle 9i installed on windows 2003 server. A couple of days before our windows crashed and the system administrator took the backup of all files and reinstalled windows. After reinstallation of windows I restored the files backed up by system administrator and tried to start the database. I got the following error:
ORA-00227: corrupt block detected in controlfile: (block 1, # blocks 1)
ORA-00202: controlfile: 'D:\ORACLE\ORADATA\ORCL\CONTROL03.CTL'
All the multiplexed copies of control files are also corrupted. We do not have the backup since last few days and the database is in noarchivelog mode. Simple restoration to the old backup would be a great loss. Kindly help me to recover the control file and datafiles.

All the multiplexed copies of control files are also corrupted. We do not have the backup since last few days and the database is in noarchivelog mode. Simple restoration to the old backup would be a great loss. Kindly help me to recover the control file and datafiles.You could try to re-create the control files assuming the database itself was closed properly.
However you should only do this if you know what you are doing.
In any case you should backup the database in its current state in case things getting worse by trying to recover. CHECK this backup twice!
In any case: Open a support ticket at Oracle. You will most probably need their help.
In addition to that - it look quite bad for your data. You should prepare for data loss (just to be sure; i dont want to scare you)....
Ronny Egner
My Blog: http://blog.ronnyegner-consulting.de

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Nitin Joshi wrote:
f the COLD Backup does not include the Online Redo Logs, an ALTER DATABASE OPEN RESETLOGS is requireed >>to create these Online Redo Logs. Unfortunately, an OPEN RESETLOGS can only be done after an Incomplete >>Recovery or when using a Backup Control file.
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I just wanted to know in above(OP's) scenario if he has complete cold backup(includes online redo logs), does he really need open reset logs or any recovery?
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For TempFiles, query DBA_TEMP_FILES or V$TEMPFILE
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http://hemantoracledba.blogspot.com

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Hi,
Set oracle_sid="your sid name"
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MAXLOGMEMBERS 3 --optional
MAXDATAFILES 14 --optional
MAXINSTANCES 1 --optional
MAXLOGHISTORY 226 --optional
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MAXDATAFILES 14
MAXINSTANCES 1
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know i am able to mount database using following command
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2 union
3 select member from v$logfile
4 union
5 select file_name from dba_temp_files
6 union
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E:\ORACLE\ORADATA\DEMO102C\CONTROL01.CTL
E:\ORACLE\ORADATA\DEMO102C\CONTROL02.CTL
E:\ORACLE\ORADATA\DEMO102C\CONTROL03.CTL
E:\ORACLE\ORADATA\DEMO102C\EXAMPLE01.DBF
E:\ORACLE\ORADATA\DEMO102C\REDO01.LOG
E:\ORACLE\ORADATA\DEMO102C\REDO02.LOG
E:\ORACLE\ORADATA\DEMO102C\REDO03.LOG
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E:\ORACLE\ORADATA\DEMO102C\TBS102_2.DBF
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E:\ORACLE\ORADATA\DEMO102C\UNDOTBS01.DBF
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Total System Global Area 272629760 bytes
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Variable Size             163579156 bytes
Database Buffers          100663296 bytes
Redo Buffers                7098368 bytes
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Database altered.
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Database altered.
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Database altered.
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File created.
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ORACLE instance started.
Total System Global Area 272629760 bytes
Fixed Size                  1288940 bytes
Variable Size             163579156 bytes
Database Buffers          100663296 bytes
Redo Buffers                7098368 bytes
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2 union
3 select member from v$logfile
4 union
5 select file_name from dba_temp_files
6 union
7 select name from v$controlfile;
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E:\ORACLE\ORADATA\DEMO102\CONTROL01.CTL
E:\ORACLE\ORADATA\DEMO102\CONTROL02.CTL
E:\ORACLE\ORADATA\DEMO102\CONTROL03.CTL
E:\ORACLE\ORADATA\DEMO102\EXAMPLE01.DBF
E:\ORACLE\ORADATA\DEMO102\REDO01.LOG
E:\ORACLE\ORADATA\DEMO102\REDO02.LOG
E:\ORACLE\ORADATA\DEMO102\REDO03.LOG
E:\ORACLE\ORADATA\DEMO102\SYSAUX01.DBF
E:\ORACLE\ORADATA\DEMO102\SYSTEM\SYSTEM01.DBF
E:\ORACLE\ORADATA\DEMO102\TBS102_1.DBF
E:\ORACLE\ORADATA\DEMO102\TBS102_2.DBF
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E:\ORACLE\ORADATA\DEMO102\UNDOTBS01.DBF
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Datafiles and control file corrupted

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