dd syntax

[Andy Farkas]

On Thu, 24 Jul 2003 mbaki at whywire.net wrote:

> I have a freebsd 5.1 machine with 2 harddrives ad0 and ad2. I need to duplicate ad2 to a 3rd
> hardrive so what I did is the following:
>
> dd if=/dev/ad2 of=freebsd5.1.bin
>
> Now when I'm done dd'ing, I can replace ad2 with the harddrive and issue the command
> dd if=freebsd5.1.bin of=/dev/ad2
>
> Both harddrives are exactly the same, so hopefully the following steps should work, correct?

Yep, thats exactly what you do.

Add a 'bs=64k' to the dd command line for better copying efficiency.

--

 :{ andyf at speednet.com.au

        Andy Farkas
    System Administrator
   Speednet Communications
 http://www.speednet.com.au/