Hi,
We’ve encountered a lot of that where I work. We don’t use XSAN, but we work with a number of removable FireWire 800 drives and frequently use our network to access drives attached to other computers. Not sure why this problem happens, but we’ve come to the conclusion here that is has to do with changing the configuration of drives attached to your system. Frequently with us for example, if I’m on system A and someone uses system B to connect to A, shutting down system B without ejecting A’s drives from B first will cause this problem. We’ve also experienced problems while adding and removing FireWire drives with FCP open – drives that FCP is not referencing. If you save the file to the desktop and copy it to your desired location (like you’ve been doing), nothing appears to be lost. It’s just kind of a pain. Sounds like a bug to me – something with the way FCP updates its profile of your system as you’re working.
Anyway, no answers, but you’re not alone.
Best,
Ben