Sam writes – “I recently built a Linux-based backup server and I documented the process. We built a full-fledged server, installed Fedora Core 4 (not 5! waaaay to bleeding-edge), setup the server to serve the 4 backup hard drives (broken-up into 2 RAIDO arrays) through FTP (the protocol our software uses), and as a bonus we setup a 5th drive (smaller) to hold the OS, software programs, and a shared folder for generic files. The fifth drive was shared through SAMBA (so it could be accessed from Mac/Windows/Linux). Because we had a fairly fast CPU and we were (believe it or not!) tight on cash, we used software RAID0.” – Link.
HOW TO – Design, build, and configure a (low-cost!) backup/server monster