@pony Right, and especially looking at its BIOS power setting and disk usage is useful.
I know this is nit-picky, but myself I get always mightily annoyed when every now and then a firmware/app update on my NAS causes it spinning disks without a reason - just because some silly app dev somewhere on the other side of the world thought that polling I/O is a smart move or something. Apart from the sound being annoying (I have it in the living room), it annoys me that some stupid software is playing disco with my disks without any good reason.
@pony I guess that for 10k CZK you'd get a nice passively cooled NAS for your disks. My RAM upgraded QNAP with x64 Intel Celeron happily runs the disks together with all the `lxc`/`docker` containers I need (and Kodi, Plex, et al.) and occasionally a Windows VM just for fun. I did not measure how much it really draws, but QNAP's spec says 10W at disk idle and 18W operational. That's a magnitude less than the PC we spoke about above.
let's be real, it's probably the computers