RE: Missing datafiles

From: Elliott, Patrick <patrick.elliott_at_medtronic.com>
Date: Thu, 28 Jun 2007 17:11:41 -0500
Message-ID: <302F06193D7F4D48ABC997408E786BD002322CAF@MSPM1BMSGM09.ent.core.medtronic.com>

I am skeptical if you will be able to apply any redo log information after the resetlogs command that you had to issue to get the database up. The SCN numbers on the online data files will be higher than the SCN's in the old ones, also.

You might be able to get it to work by recreating the controlfile and then issuing the "recover database until cancel using backup controlfile" command.
When it prompts for log files, go ahead and give it a full path name to the current online redo logs one at a time. Be sure to put the missing data files in the exact same positions that they were before in the create controlfile statement. Don't just add them to the end.

Be sure and save the current controlfiles just to be safe in case it doesn't work.

Pat

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Kanwar Plaha Sent: Thursday, June 28, 2007 4:36 PM
To: oracle-l_at_freelists.org
Subject: Missing datafiles

Hi,
A database was copied from another one and the controlfile to create it missed out couple of datafiles.
The database now has missing datafiles listed in it. Also, the fact that some datafiles are missing was not known until a few days when some changes to the database have taken place. My question is if its possible to 'restore' the database now? I can see the missing datafiles on disk although with an older timestamp than the ones that are online.
The database is in NOARCHIVELOG mode. However I checked v$log and found that since database build, no log switch has happened yet. Does this means shutting the database down and recreating the controlfile with the missing datafiles can bring the database to a consistent state? Can it use the current redo log for recovery, if required?

This is rather urgent, although not critical since its not a production environment.

Thank you,
Kanwar
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http://www.freelists.org/webpage/oracle-l Received on Thu Jun 28 2007 - 17:11:41 CDT