I have two 16 gb partitions on the same drive. One is my active knoppix system and the other is available for backup. I want to protect my ( at the moment !) working system from my LINUX stupidity by using dd to copy
hdb1 to hdb2. If I boot from a knoppix cd willl

dd if=/dev/hdb1 of=/dev/hdb2

do the job. After I break my working system I plan to boot the cd
and do the dd again

dd if=/dev/hdb2 of=/dev/hdb1

Corrections , suggestions and/or criticisms very welcome

Thanks