Steve
FWIW, even ancient 486 machines can deliver excellent file-server performance. Before you do anything, try dumping the old memory and replacing with (say) 512mb. This may have an almost miraculous effect on disk thrashing and cpu loading, especially if you limit the virtual memory size at the same time.
Feel free to send me a cheque for half the savings if it works ;-)
Regards
JR
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1