We really would also need this feature.
We have one VM (file server) with 2.7 TByte data, and not able to back it up with one tape on a single LTO-6 tape, even with compression/deduplication.
But the customer has (historically) two LTO-6 drives, worth around EUR 3.000,--
So dropping them away and buy a tape library cannot be the solutions for all Veeam customers haveing this circumstances.
By the way, there is in the moment even NO possibility to set up a time, how long the tape job waits for the next tape, before he cancel the job. In the moment in Veeam 8.0 it seems to be like 5-10 minutes....