I've messed around with RasPis a fair bit in the past, and right now I'm trying to work out the details of a NAS build. Essentially, an RPi NAS would be a stepping stone to when I can afford a proper 8x 4TB FreeNAS setup. The plan was to use a desktop case, and an ATX PSU with something like this to get started with a couple of 3.5" disks and an RPi server.
While I could use some more traditional SATA - USB hard drive docks, I'd quickly wind up needing to connect a bunch of different wall warts to separate outlets to keep everything running. This is super undesirable for many reasons, and my main goal is to keep everything nice and neat within a single case that has one power cable and one ethernet cable running from it. The issue is that I can only find products like this that would connect a hard drive to the Pi, which all seem to rely on mains or USB power when they support 3.5" drives. I'm looking for a way I could get SATA <> USB *only*, with power coming directly from an ATX PSU. Is there a way I could do this?