kactusotp writes "I run a small indie game company and since source code is kind of our life blood, I'm pretty paranoid about backups. Every system has a local copy, servers run from a raid 5 nas, we have complete offsite backups, backup to keyrings/mobile phones, and cloud backups in other countries as well. With all the talk about solar flares and other such near extinction events lately, I've been wondering though, is it actually possible to store or protect data in such a way, that if such an event occurred, data survives and is recoverable in a useful form? Optical and magnetic media would probably be rendered useless by a large enough solar flare and storing source code/graphics in paper format would be impractical to recover, so Slashdot, short of building a Faraday cage 100 km below the surface of the moon, how could you protect data to survive a modern day Carrington event? http://www.abc.net.au/science/articles/2012/03/06/3446150.htm"