After building a very very fast staging disk system to feed it. That's one of many reasons I went with LTO-4 and a slower HP tape drive, I can feed it without shoe-shining from one 15K SAS disk that I have Bacula staging to ... and I don't care about how long it takes to do my backups or restores, which is generally not the case for businesses. Back when I made that choice, it was said no single magnetic disk could keep up with an LTO-5 tape drive.