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Corrupt block header, no backup, need media recovery [message #54841]

Mon, 09 December 2002 12:52

Garth Neumeyer
Messages: 2
Registered: December 2002

Junior Member

I've got an Oracle DB (8.05) on a RAID 5 disk which crashed.

Current state:
One data file requires media recovery
Archivelogmode = true
Entering "Recover datafile '<blah>'" generates
ORA-00353 & ORA-00354 errors (Corrupt redo log
block header)
No valid backup for this database

We don't particularly care about any data loss, we just want to get the database back up. Any suggestions?

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Re: Corrupt block header, no backup, need media recovery [message #54844 is a reply to message #54841]

Mon, 09 December 2002 13:26

Mahesh Rajendran
Messages: 10707
Registered: March 2002
Location: oracleDocoVille

Senior Member
Account Moderator

1. Bring the database to mount stage ( if possible, do a clean shutdown and issue startup mount).
2. issue the following
   ALTER DATABASE CLEAR UNARCHIVED LOGFILE ' < your_logfile_path_as_shown_in_error >'; 
3. If Everything is OK,
   open the database.
   and do a clean shutdown again.
   and startover.

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Re: Corrupt block header, no backup, need media recovery [message #54846 is a reply to message #54844]

Mon, 09 December 2002 14:19

Garth Neumeyer
Messages: 2
Registered: December 2002

Junior Member

Thank you. I'm now getting a checksum error on one of the archived logs. I try to do a recover until cancel, but am now getting ORA-1547 indicating that OPEN RESETLOGS will generate an error because the SYSTEM datafile requires further recovery to be consistent. Is there a way to bypass this error and/or recover the SYSTEM datafile?

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