I just noticed this today on my new Pi2, never seen that error on the B+ either. Guessing something in the kernel needs tweaking maybe, be interesting to know what it is.

Yeah I'm just not good with working out electrical stuff Software is far easier to fix and work out, for me anyway.

At most, each device might have 3 (or 4) 2GB NAND MLC's stuck in. But no other expansions or full HDD's at all. So any idea what the power drain would be on that?

I'm currently running a single older B+ model from a spare iPhone charger. Hasn't been an issue yet at all. But I'm just about to order up 4 Pi 2's, and I'm just wondering if this USB Hub charger is sufficient to provide enough juice for each one. http://www.amazon.com/SuperSpeed-Charger-Transfer-In...