EPO Button. What if every data center had a big, red, tempting button that immediately shut off all power (including UPS and generator power) for the facility? Hahaha, yeah right, that’d be like a self-destruct button, right? No, that would be the Emergency Power-Off Button, which every data center is mandated by law to have. The intention is good - to protect firefighters from electrical shock, but they are often not sufficiently safeguarded and end up causing more damage than they prevent.