How do I save a disk image of my laptop hard drive?

[Mark Phillips]

On Thursday 05 April 2007 15:51, George Toft wrote:
> Method 1:
> 1.  Boot a knoppix cd
> 2.  Open a root terminal window and issue this command:
> dd if=/dev/hda | ssh user at someremotehost "> /path/to/file/backup.img"

When I tried this, I was prompted for my password for user at someremotehost, 
which I entered, and then just fell back to the root knoppix prompt.

Do I have to mount /dev/hda first? How do I do that?

Mark