Looking in to the driver idea further... turned out that my drivers were the second latest ones out there.

Installing the latest StoreEver drivers made it all magically work.

Thanks Boris!

I have tried that, but still no luck. There are no unknown devices in device manager either.

Hi, I have created a target for the tape library, and attached both Tape drives to it on a Server2019 host that the tape library is directly connected to. The host can see the tape library and the two LTO-7 drives in device manager, and the drivers are all up to date. Over to the guest VM, run from ...