If anyone is thinking about setting up a fileserver using an oldish box then DO consider FreeNAS -
http://www.freenas.org/index.php?opt...page&Itemid=22
"FreeNAS is a free NAS (Network-Attached Storage) server, supporting: CIFS (samba), FTP, NFS, AFP, RSYNC, iSCSI protocols, S.M.A.R.T., local user authentication, Software RAID (0,1,5) with a Full WEB configuration interface. FreeNAS takes less than 32MB once installed on Compact Flash, hard drive or USB key.
The minimal FreeBSD distribution, Web interface, PHP scripts and documentation are based on M0n0wall."
I've got a modest Celeron running FreeNAS as a fileserver at home and its very quick, stable and extremely simple to set up.