I have a weekly backup to tape schedule, since our Email need more then 1 (less than 2) tape space, I setup Email and Sharepoint Media co-location.

When backup to tape start, Email use one Media, Sharepoint use another one. When Email need the second tape, instead of mount the second tape still have plenty space, it keep waiting for tape.

If I resume the tape backup it will mount the tape already full (offsite ready) instead of the one still have plenty space, then start to wait for tape again.

But if I take the full tape(offsite ready) out from tape library, then it use the second tape which still have plenty space (co-located with sharepoint), and finish backup successfully.