Terrain
they are okay but poor value for storage. As ORAC and others have said, it's a toy, and there are disparate solutions, which, for more money, might save you time and tears. For me, the fun is trying to hack this beggar into doing something different. Its preconfigured software blows goat.
Proliant fans
Well spotted, but you weren't looking at a Proliant, only the cage (it parted company with the server about six years ago). It is connected to an Adaptec card in my main machine. Makes a lovely noise as it spools up. Whirr!
It comes with its own wee PSU drawing 50W and only runs for a hour a day if it is being used. As my only child died and we haven't needed to own a car for the last eight years, my conscience is relatively clear when it comes to its carbon footprint.
BOFH