I had the same problems a few people above mentioned. But since memory requirements are rising and rising I now bought a ATX casing, added 5 hard discs to a Raid 5 (approx. 2.5TB).
Surely, not the cheapest approach, but I think something like this will last longer (more space, does not "die" when the original machine becomes obsolete) than a normal shared disk and I can also use it as a print server, bittorrent client and so on.Cheers!
There is no royal road to geometry. -- Euclid