Notes
How to dd over telnet
Start server on the receiving machine
$ nc -l -p 12345 | bzip2 -d | dd bs=1M of=dd_dump.bin
then on the sending machine run
# dd bs=1M if=/dev/sda | bzip2 -c | nc 192.168.1.7 12345
Start server on the receiving machine
$ nc -l -p 12345 | bzip2 -d | dd bs=1M of=dd_dump.bin
then on the sending machine run
# dd bs=1M if=/dev/sda | bzip2 -c | nc 192.168.1.7 12345