Oh yes!...it will at least tell you when something is wrong.
Indeed. The Qotom boxes are very nice, and I have deployed them veryu successfully using *nix and OpenBSD.Actually the APU2 (at least in the 4G configuration) is supposed to support ECC. It was always advertised as doing so, but early BIOS versions disabled the support, if I understand correctly. I think it's enabled at least in the latest BIOS version (and mine displays 4080 MB ECC DRAM upon booting). Whether 4G of RAM would be enough to use ZFS is of course a different matter.
BTW, that Qotom box sure looks nice, too...