Oracle DBV usage instructions

DBV indicates that database verify can be used to verify whether a data file in the database is faulty. You can check whether a data file contains bad data blocks, for example:
DBV file = D:/oradata/demo. DBF blocksize = 8192

Enter BDV in command line mode and the following information is displayed:

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Keyword description (default)
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File the file to be verified (none)
Start start block (the first block of the file)
End end block (the last block of the file)
Blocksize logical block size (8192)
Logfile output log (none)
Display progress of feedback (0)
Parfile parameter file (none)
Userid username/password (none)
Segment_id segment ID (TSN. relfile. Block) (none)
Maximum chunks to be verified by high_scn (none)
(Scn_wrap.scn_base or SCN)