Wikipedia
SystemRescueCD
SystemRescueCd is an operating system for the x86 computer platform, though the primary purpose of SystemRescueCD is to repair unbootable or otherwise damaged computer systems after a system crash. SystemRescueCd is not intended to be used as a permanent operating system. It runs from a Live CD, a USB flash drive or any type of hard drive. It was designed by a team led by François Dupoux, and is based on the Gentoo Linux distribution.