I have been running OS/2, now eCS, for the last eight years. I keep none of my data or code on the boot drive. Usually when something crashes the worst that happens is a need to reboot to get rid of the hung app. Only once in those eight years did the OS get clobbered badly enough that a reboot wasn't good enough. I formatted the partition and un-ZIP'd my backup to it and was back up.
DFSee will do this as well as saving the partition tables. It is cross platform and, if you register, can create a bootable floppy and a bootable CD.
Ted