How to recover the data file in Oralcle 10 g...? No backups and no newspaper archiving

All,

I need to recover the data file 2, which is for the undo tablespace and it is in the State to recover and I need to recover the data files now.

But the bad news is we have no backup at all and we have no archive logs (log archiving is disabled in the database)...

In this case how can I recover the data file...?


SQL > select a.file #, b.SID, a.status from v$ datafile a, v$ tablespace b where a.ts #= b.ts #;

FILE NAME STATUS NO.
---------- ------------------------------------------------------------------------------------------ -------
1 /export/home/oracle/flexcube/product/10.2.0/db_1/oradata/bwfcc73/system01.dbf SYSTEM
* RETRIEVE /export/home/oracle/logs/bw/undotbs01.dbf 2 *.
3 /export/home/oracle/flexcube/product/10.2.0/db_1/oradata/bwfcc73/sysaux01.dbf online
4 /export/home/oracle/datafiles/bw/bwfcc73.dbf online
5 /export/home/oracle/datafiles/bw/bwfcc73_01.dbf online

SQL > archive logs list;
Database log mode no Archive Mode
Automatic archival disabled
Destination of archive USE_DB_RECOVERY_FILE_DEST
Sequence of journal online oldest 4940
Current log sequence 4942

Hello

First, you must open a ticket with oracle Support and explore the options

You can use this note to fix:
RECOVERY OF A LOST IN A [ID 1013221.6] UNDO TABLESPACE DATA FILE

If you are unable to drop Undo tablespace as Undo Segment recovery must

You can download the trace file following the opening of the ticket

SQL>Alter session set tracefile_identifier='corrupt';

SQL>Alter system dump undo header "";

Go to udump

ls -lrt *corrupt*

Upload this trace file

Also upload the alert log file

Kind regards
Levi Pereira

Published by: Levi Pereira on November 29, 2011 13:58

Tags: Database

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