ORA-38740: Usable blocks value string is not valid.



ORA-38740: Usable blocks value string is not valid...

Answer / guest

Cause: A flashback database log file header contained a
usable blocks value greater than the file size. The
flashback database log file file is corrupt.

Action: If you are doing a FLASHBACK DATABASE, then the
flashback cannot be performed because of the corrupted log.
A restore and an incomplete recovery must be performed instead.

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