I have an HP DAT-72 tape drive (HP-Storageworks - USB) and it has an annoying bug.
When I am doing an operation, and I put in a cleaning tape, the script "hangs" for several minutes.
In "Storage Devices", the drive shows up "Empty", and the script is "waiting for media". It seems nothing I do will free it, except to wait about 2-3 minutes. It then resumes operation.
Annoying.