I build a home nas last year in an InWin IW-RF100S: 2x3.5", 2x2.5", mini-itx, 1U height, FlexATX power supply. It's a bit noisy, but it is the near perfect for

I build a home nas last year in an InWin IW-RF100S: 2x3.5", 2x2.5", mini-itx, 1U height, FlexATX power supply. It's a bit noisy, but it is the near perfect form factor that just slides under a bookshelf.