Datafile header surgery

  • From: "Donahue, Adam" <Adam.Donahue@xxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 10 Jan 2007 13:07:48 -0500

Has Oracle (or anyone else) published the header format for database
datafiles?

I ask because one of our datafiles was corrupted due to an nStor outage
yesterday, and thus is triggered an ORA-01251 when one attempts to
recover it:

01251, 00000, "Unknown File Header Version read for file number %s"
// *Cause:  Read of the file header returned a record but its version
cannot
//         be identified.  Either the header has been corrupted, or the
file
//         is not a valid database file.
// *Action: Have the operating system make the correct file available to
//         the database, or recover the file.

The database is in development and therefore isn't backed up, but before
rebuilding I thought it might be interesting to attempt a manual hack to
the header to get the database to load so that data could be extracted.
Any other potential workarounds here?

Adam

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