----- Original Message -----
From: "Barry Jones" <BEJones@semprautilities.com>
I can't tell you the kind of servers, but I can say that I was recently in Prineville, OR, where FB is building a data center (and a second data center). I was used to the ol data centers - you know, where there's raised floors, cabinets, cool air, a guard and a few guys around with some screens?
Data Center Knowledge posted about 20 minutes of very poorly shot video of Prineville. They're Open Compute servers in 'triplet' racks.
But this was massive. I was amazed at the size - a few city blocks long and a city block wide, with a transformer and power line the size of a small city. I wonder if the Feds were involved.
Their power supply (also open) runs across 2 legs of a 277/480 3-phase feed, which is usually what the substation supplies to your PDUs, which step it down further to 120/208. It also takes -48, and each pair of triplets has a 48V float string that will run the 180 servers for about 45 seconds. It's a nice setup. I plan to steal it. :-) (The substation input voltage is very often 13k2 to 13k8, though it can be even higher.) Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274