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Re: Oracle DB cannot restart due to missing REDO-file

From: T. Lehrmann <>
Date: Mon, 17 Jan 2005 01:59:12 +0100
Message-ID: <>

Thanks also for your advice, Antoine,

I already tried out the _allow_resetlogs_corruption -flag in the init.ora file but it didn't help....

I wasn't very familiar with Oracle, all I knew till now was that log-files aren't vital for programs to continue to operate.. now I know, there are some exceptions.. at least concerning Oracle and its way of naming files (i.e. file extensions). Nevertheless it was clearly my fault, and the DB seems lost, so I paid my dues...

"Antoine BRUNEL" <> schrieb im Newsbeitrag news:41eb0901$0$17653$
> Hi from Paris
> if you losed online redo logs, you have two options:
> - do a full database restore, and apply archived up to when you dropped
> redo logs... this is an incomplete recovery (recover... until cancel)
> - open the database without doing the crash recover, which will introduce
> corruption (as commited transactions may have not been fully applyed to
> dbfiles)... this is an unsupported way, you have to open an iTar at Oracle
> Support, and ask them for _allow_resetlogs_corruption. Anyway after that,
> the current DB will be considered as unsupported, and you will have to
> export full the DB, and create a new to one to import data.
> whatever option you take, take a whole backup before doing anything...
> But: NEVER, NEVER, NEVER modify Oracle files with an hex editor... this
> would the perfect way to totally broke down you db....
> "T. Lehrmann" <> a écrit dans le message de news:
>> Hello,
>> I have a big problem with my Oracle DB (V 9.1): the service cannot start
>> and when trying to connect Oracle error message "ORA-01033" pops up,
>> saying "ORACLE initialization or shutdown in progress". In the log file
>> is written:
>> "Errors in file c:\oracle\admin\DBNAME\bdump\DBNAME_lgwr_480.trc:
>> ORA-00313: open failed for members of log group 2 of thread 1
>> ORA-00312: online log 2 thread 1: 'C:\ORACLE\ORADATA\DBNAME\REDO02.LOG'
>> ORA-27041: unable to open file
>> OSD-04002: File cannot be opened
>> O/S-Error: (OS 2) System cannot find the specified file"
>> This was casued because I deleted the 3 REDO-logfiles REDO01.log,
>> REDO02.log and REDO03.log of my database (I am no real DBA, I thought
>> Oracle only needs this files if one wants to recover a DB!).
>> Apparently, Oracle recreated REDO01.LOG, but not the other two files and
>> now has problems to even start the DB.
>> Is there any way (e.g. nologging adjustments in init.ora) to get my DB
>> started again?
>> Any help will be appreciated! Thanks in advance,
>> Thomas
Received on Sun Jan 16 2005 - 18:59:12 CST

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