While it's very cool looking, I don't believe the quoted output of those submarine engines.
I worked at Nationwide Companies' (Insurance) data center for over a year and they had six bigger submarine engines. That was for 38,000 windows servers, four massive IBM mainframes and three tape "pods" (those 12' diameter robotic tape changers).
The power from the grid goes into more lead acid batteries than I could count or even guess, but I think I remember hearing there was more than 48,000 of them. If power gets cut, the data center runs off the batteries and within 60 seconds the submarine engines automatically cut on. Only four are really needed, so the other two are running as a failsafe.
That facility has five foot thick reinforced concrete and steel plate walls. It's rated as a level 10 data center and even though it's a building in the open can handle a F5 tornado sitting right on top for more than 60 minutes. How they figured that out, I'll always wonder.
I couldn't get pictures cause cell phones and cameras weren't allowed, but it looks like every other normal data center.
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