It's mounted to /srv which is not empty, and I can also still browse some of the folders on the removed drive, which is also confusing :) I don't understand how that's even possible.
Edit: It does not show up as a drive, but the mount directory is still there with a folder structure and a single file.
Edit2: I deleted the folder which seems to have done the trick. Still confused about how and why it was still accessible......
Sure, I mean I am used to reading (and writing) manuals and documentation, so I usually go that route first when I know where to look. And your answer was helpful. Anyway, what are some authoritative ressources I should consult concerning these fundamental concepts?