BASH:dd

How many blocks to ignore:
skip=1   for if
seek=1 for of

backup mbr:
dd if=/dev/sda of=mbr bs=512 count=1

get partition table in mbr:
dd if=mbr of=dpt bs=1 skip=446 count=64

write image to floppy:
dd bs=512 if=Image of=/dev/fd0