Hi Pavel and thank you for your reply,
Today we protect data on tape during 41 days and media set is setting everyday at 7:00pm. Actually and to be more precise, last night, the first backup tape job have run succesfully, the second one have begun and have frozen at 98% and demand to " insert tape to continue" . Consequence : the two next jobs have not run because of this freeze. I don't understand because i am seeing that 2.2TB are available on this tape.