Waaay back in my mainframe days, waaay back (early 80's) when I was a lowly computer operator for a small insurance company, I was the first to enter our air conditioned mainframe computer room (normally kept very cold) in the morning only to discover that the large air conditioner (located in the computer room, where it should not have been) we depended on for cooling had failed. Not only had it failed, but the high temp cutoff that should have tripped a breaker had not tripped. I had not experienced such heat since my first summer job working in a kiln at a local sewer pipe factory - I was in an instant sweat. All computers were still running! I instantly brought down all programs and the mainframe in an orderly fashion. Later, I pulled one of the floor squares covering our elevated floor to find all our heavy duty cabling, including power cables and junction boxes, immersed in several inches of water! Yikes! After the air conditioner was repaired and after pumping the water out as best we could, and cooling and drying the room and floor with all the industrial fans we could find, we started up our mainframe, fully expecting everything to go up in smoke. But we came up and were running just like nothing happened. Nothing was lost but time and nothing was harmed. No hard drives were affected. And kept on using the same air conditioner until we switched to pcs and servers.
