Finding Total Number Of Corrupted Blocks

Hello,
I just browsed several websites including RMAN documentation and information on how to identifiy corrupted blocks.
I´m in the middle of reorganizing production backups and their restore tests by duplication, which should (in my opinion) be followed by an analysis for corrupted blocks.
I found RMAN command BACKUP VALIDATE CHECK LOGICAL DATABASE ARCHIVELOG ALL; to fit my needs. Recently I read the validate command only writes NEWLY found corrupted blocks to View V$DATABASE_BLOCK_CORRUPTION.
1. How do I check the WHOLE database for its TOTAL physical and logical corrupted blocks?
2.Under which circumstances is it NOT necesssary to check the database after the restore? In other words is there a way to ensure the backup cancels immediately when finding a corrupted block?
3. Is it necessary to set maxcorrupt to "0" during the Backup to get it cancelled for every corrupted block found?
4. What does dbv in contrast to backup validation?
Please be so kind to post me some short hints.
Regards
Dominik

Hi,
thanks for your feedback again.
Yesterday I "accidently" faced the situation to work with a block corrupted database during a restore test.
So I had the chance to run both backup validate and dbv against its corrupted files.
dbv worked fine, recognized all corrupted blocks and reported them in its output.
Disappointingly backup validate neither reportted any corrupt withtin the whole database (there are several datafiles with corrupted blocks), nor posted them to V$DATABASE_BLOCK_CORRUPTION. There I could only find a hand full, but not all of them.
I´m very consufed now, what would I need backup validate for anymore??? :-/
I built myself a script to check the whole database with dbverify. Regarding production databases we cannot live with uncertainties like that
Regards
Dominik

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