Netcat is also a really handy utility for cloning drives as it allows you to do the transfer over the network (make sure you have a fast connection) without putting copy-from and copy-to drives in the same machine.
Basically, you do do this...
On the machine you are copying from:
dd if=/dev/sda | nc 10.1.1.2 9000
On the machine you are copying to (assume ip is 10.1.1.2):
nc -l -p 9000 | dd of=/dev/sda
Atlanta Georgia Search Engine Optimization
| Atlanta Website Design