Oracle : Ошибка ORA-19511

"Error received from media manager layer, error text:\n %s"
*Cause: An error occurred in the media management software which
is linked with the Oracle server to perform backup and restore
in cooperation with Recovery Manager.
*Action: If the text of message 19511 does not provide enough
information to resolve the problem, then you should contact the
vendor of the media management software.

Попробовать перевести

Поискать эту ошибку на форуме