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Cloning hard disks over the network:

Terminal - Cloning hard disks over the network:
Boot up destination machine with Knoppix live CD and run nc -l -p 9000 | dd of=/dev/sda Then on the master dd if=/dev/sda | nc <dest-ip> 9000 You can monitor bandwidth usage to see progress: nload eth0 -u M
2009-05-07 05:26:58
User: lv4tech
Functions: dd
-1
Cloning hard disks over the network:

This is a bit to bit copy so if you have a 500GB hard disk it will take a long time even if have Gigabit Ethernet

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Besides the fact this is bad formatted, you forgot to advise if the hard disk contains an OS, both computers must have the same hardware configuration. Also, you need to Ctrl-C to ends nc (just for the master machine because the destination one finishes by itself after that). Although I think "why do you need a dd copy of an entire hard disk drive just for your regular files?" An scp would be better.

You might suggest a use, like some corporation which has a lot of the same manufactered computers

and need to them running the same OS configuration. However, better cloning just the interest

partitions (and restoring the MBR with GRUB, for example).

That's more useful if you run a NIS service on your server and the clients share accounts with it.

One more comment. You can use the -vv (verbose) flag for nc and track when the copy ends.

P.S.: I don't know Knoppix, but with the Ubuntu LiveCD you must need to be root (sudo doesn't work).

Comment by cammarin 381 weeks and 5 days ago

Having 2 identical machines and wanting to have a hot spare in case something goes wrong with the primary, just switch an internal ip and you are back up and running in a matter of minutes. I think of it like windows system restore, this is done weekly with no downtime for the live machine. If you know a better way of achiving this please do let me know

Comment by lv4tech 381 weeks and 4 days ago

Or you could use the network block driver maybe....

Comment by DaveQB 381 weeks and 4 days ago

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Comment by chanyuan 7 weeks ago

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