Perhaps try dd and netcat booting knoppix from the cd with noswap cheat on the master.

- Check the ip of the slave.
- Start netcat on the slave: nc -l -p 8000 | dd of=/dev/hda
- Then start pushing data from the master you wish to copy: dd if=/dev/hda | nc 192.168.x.yyy 8000
- Go get a laaaaarge cup of coffee.

I would set aside a router disconnected from internet for this just to make sure nothing gets in the middle.
You can choose the port, I chose 8000 just to put something there.

Here's a boot floppy (2) with dd and nc for the boxes that won't boot from cd http://omnibus.uni-freiburg.de/~gian...escue/current/

Disclaimer: haven't tried this

PS: Wouldn't it just be easier to pull the hd's and dd locally on one computer?