Copy on Write, see https://en.wikipedia.org/wiki/Copy-on-write https://en.wikipedia.org/wiki/Copy-on-write and http://arstechnica.com/information-technology/201

Copy on Write, see https://en.wikipedia.org/wiki/Copy-on-write https://en.wikipedia.org/wiki/Copy-on-write and http://arstechnica.com/information-technology/2014/01/bitrot-and-atomic-cows-inside-next-gen-filesystems/ http://arstechnica.com/information-technology/2014/01/bitrot...