The Yahoo! Sunnyvale campus lost power today at 12:22 for a bit less than a minute. Apparently PG&E reported an “event” in South San Jose and our power was affected.
So, in any case, the generator works, and all of our desktops have been reboot-tested. :) The generator is really loud.
Jeremy Cole 
you can get a cheap small ups on ebay for 20-50$. very worth the expense… only hold for some minutes, but at least until the generator kicks in.