Hi anyone give us some idea....how to go about it...
Database version 7.3.4.5.. Os..SunOs Version 5.7..We checked by restoring even two months old datafiles from backup all reports corrupt...it is a production db.

SUMMARY:
========
-corruption was found during migration to 8.1.7
-Restore/recovery was performed and corruption still exists.
-Dbverify ran for all datafiles and 2 system and one temp datafile are corrupted.
-used veritas netbackup to do backups.
-restored to another machine.The database starts fine but dbverify reports and Export also gives errors
-There is no backup that does not have these errors - we have restored several.
-resized the system datafile and made it bigger. But when restored the backup, it is not using the resize database, we are using the database from the restore, therefore the resized system datafile do not come into play here.
-corruption was on a index system datafile (I_CCOL1), which cannot be dropped and rebuilt because in version 7.3.4. this is part of the bootstrap.

Plesae help.
Thanks.
Thanigaivasan.