I'm sorry if I didn't make myself clear; I've been running a media server properly for quite a while now. I run the server from PC1 (even though the files "reside" to PC2, the client), because that's where I do all my work, editing etc. I restored a fully working library that never had a similar problem with "missing drives". When the drives are on, MC sees the files, builds thumbnails etc, but wheen they're off, it just deletes the entries - which never happened before.