> What do you want to do with this filesystem? 

Aways a good question. I have a bunch of nonidentical  PCs running SL4.x
connected by gigabit. People can log into any of them and see their home
space. Currently I do this by having two of them as file servers, each
with a mirrored disk pair. Ideally I would like to have a single virtual
"/home" filesystem which I could add physical disks to and which is
resilient to any one node being down.

Needless to say, there's no budget for any fancy hardware.

John