Shortly after setting-up single-node Kubernetes cluster, single-node Ceph cluster I wanted an actual cluster. I've also noticed that Ceph doesn't actually work all that well: Besides obvious lack of failure tolerance, it didn't seemed to like working on top of just two storage devices of a very different sizes (internal ~300G HDD and 1T USB-HDD). So I've decided to get some more hardware.
I live in a small apartment and I don't really have a lot of space. All I have is a small shelf in storage area. Normal desktops and especially rack servers won't fit. They are also noisy, eat a lot of power and produce a lot of heat. Another thing is that I already had two old SATA HDDs lying idle, which I wanted to use, so the new hardware needed SATA support.
I found the solution in Odyssey X86 board.