Black, red, and green from WD, other manufacturers have concoted other ways to differentiate different lines. I've always assumed there was nothing in it at all but doing some research last night I'm not so certain now. It seems WD's "Red" drives which are supposed to be best for your NAS are actually different, they don't park the heads at the first available opportunity. That sounds good for us editing people, maybe.

I have I read too much into this or is there actually some differences, ones that the manufacturers seem to be doing their best to hide?

Bob.