i'm going to be building a fileserver to run alongside my primary computer, connected by gigabit ethernet. and running hardware RAID5 from a 3ware pci 4x sata raid card. probably with 4x 200GB or 250GB sata hdd's. since the raid card is true hardware i won't need much processor power or ram...i'm thinking 2.4ghz celeron or maybe a pentium 3 pc if i can find a cheap used one that's compatable...and 256MB of ram. anyway...this will be used for streaming my multimedia files and storing back up files from my RAID-0 array on my pc. the question is, if i use linux...one of the free ones, will it be compatible with window's xp pro on my pc? i want to set the fileserver up through "map network drive" on my pc, so i can have drive-letter access, and since i'm going to be spending around $1,000 just on hard drives and the controller card...i would like to keep the rest of the expenses at a minimum....any ideas?