27 DBV-00200 to DBV-00201
- DBV-00200: Block, DBA number, already marked corrupt
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                     Cause: The block was previously corrupted. It has been marked as corrupt by the Oracle database server. 
- DBV-00201: Block, DBA number, marked corrupt for invalid redo application
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                     Cause: The block was marked corrupt by the Oracle database server for invalid redo application, ex: media recovery of a NOLOGGING object or direct loaded data.