On 1/13/07, Reinhard Gimbel <[EMAIL PROTECTED]> wrote:
Hello Bo, hello community !
Bo wrote / schrieb:
> I've just been lurking so far but
> I would be happy to recieve some help on the topic of how to clone an
> entire disk (with
> partitions and diferent filesystems and all) on a dual boot home systen.
> No servers or anything.
Unix command "dd" (= device dump) is your friend !
Assuming the disk to clone is connected to primary IDE channel as master
(=/dev/hda) and the target disk resides on primary IDE as slave
(=/dev/hdb) the command you need to issue looks like this:
dd if=/dev/hda of=/dev/hdb bs=128M
The option "bs" specifies a buffer of 128MB size. Otherwise "dd" would
copy blocks of 512 byte each ...
I agree with others, that a Ghost like program would be better than
dd, but if you're going to use dd to copy a whole disk, use the read
error options to continue past the occasional bad sector:
dd if=/dev/hda of=/dev/hdb bs=128M conv=noerror,sync
And bs=4k is big enough in my experience. (And I do this a lot
including timing tests etc..) If you're target is a tape, then you
want (need) a big blocksize like above, but be sure to label your disk
with the blocksize you used. I've found that a lot of tapes can only
be read if you use the same blocksize as you wrote.
Greg
--
Greg Freemyer
The Norcross Group
Forensics for the 21st Century
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