I use Atom d525 on a headless Debian server with software raid 4 (4X2TB) and I share the consensus view that Atom is more than adequate in this specific role. Start by identifying what operating system and software you want to run then ask folks who run that software what works for them.
Do you know if any of the low end solutions available in market (either atom or zacate) have motherboards with hardware raid available?
