How do I use DBV utility for User Managed Backup?

Dear all! I am a student, studying RMAN and User Managed Backup. But I did not understand how to use the DBVerify utility to check a block or a backup of control file.What's command can I do?
Thanks for your reply!

DBV is a utility which workd with Oracle Datafiles not with controlfiles.
controlfile can be always recreated by you, just issue in a time of backup:
alter dabase backup controlfile to trace; in case you will have corrupted binary copy of controlfile you will have an option to use this trace to recrete it.
Best Regards
Krystian Zieja / mob

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