Fastest way to move Ubuntu from one (small) disk to a (bigger) disk?

[debian]

On Mon, 2008-08-04 at 12:41 +0200, Gilles Gravier wrote:
> Hi!
> 
> I need to move my Ubuntu system from one small disk to a bigger one. 
> What's the fastest way to do so? (If I can avoid a re-install, it's better).
> 
> Thanks in advance,
> Gilles.
> 
> 
i hear that you can use if=/dev/[small disk] of=/dev/[large disk] but
ive heard that its not recommended.