I've been trying to backup roughly 4TB of data (200,000 files) to LTO-6 tapes. Each time, the job takes 8-10 hours and spans two tapes. It appears files are transferred correctly, and the tapes are shown as having x amount out of 2.4TB used, but the job ends in an error: Failed to export tape: Cannot to detect I/E ports. Veeam ONE also triggers an alert (that is quickly cleared) saying the tape server is inaccessible.
Veeam fully updated and is running on a physical server running 2012, and the Quantum Superloader LTO-6 is directly attached to it. When I do a 20TB backup to tape job, it completes successfully and uses nine tapes. I can also do a smaller file to tape job (I tried 8,000 files and around 90GB) and it worked fine on a single tape. Has anyone run in to a similar issue? Support seems to be indicating it's related to the autochanger, but since the much larger backup jobs work I'm not sure what the difference is.
Case number is 01022029.