Almost foremost
foremost, rsnapshot, losetup, dd,
gzip, dd if=/dev/sda of=sda.mbr bs=512 count=1, /proc/cpuinfo,
/proc/meminfo, /proc/interrupts, ... and now we have a look at
grub; booting just the kernel and the ramdisk. pffff.....
Btw.: Booting from USB-stick, when the Computer cannot is nice.
Booting from a Digicam or the mobile is freaky!