Does Veeam have the ability to segment/split/chunk files after they're larger than "x" size? If not, there really needs to be, because multi-TB files just aren't meant to be copied to tape as a single file. We have a few VM's with single VMDK's that are 4TB in size (used), and it take a really long time to copy the vbk to tape. The copy time isn't as much of an issue, but when we have a hiccup or some other issue during a backup, we need to copy the entire 4TB vbk file again. I'll place part of the blame on our backup software for not properly creating check points, but at the same time, I honestly think you guys should have this as a feature (if you don't already). Ghost has this and its a 10+ year old product. Tape isn't going anywhere any time soon, so even if tape isn't your primary backup solution, the system still needs to be designed in a way that makes it tape friendly.
Further more, if we need to restore from tape, (lets say single file restore) it would be really useful if we only needed chunk 1 / 75 to restore a single file instead of needing all 75 chunks (as an example).