10 year old pentium II based pc
+ FreeNAS
+
+ Hitachi HD 1TB....x2
I'll be assembling a NAS device for my parents office in a few days. I'll probably drop the 1tb Hitachi in favor of a 750gb Seagate due to the price difference. I may even wind up buying a slightly faster, off-lease computer to ensure better performance under load from the 3 graphics workstations + the office computers which will be accessing it regularly.
The real challenge in all this is to figure out how I want this to run - weekly backup or full on network drive... which would need backing up somehow.... I guess there's a reason small businesses generally don't run enterprise grade technologies...