At 03:29 PM 3/11/2006, Joseph Vella wrote:
On Saturday 11 March 2006 14:43, Wojciech Puchar wrote:
> >
> > Here is a simple (I think!) question for the I/O savy among you:
> >
> > If I had two identical disks, say, 73 GB Seagate 10K SCSIs, one
completely
> > operational fully setup FreeBSD with all the trimmings, and the other
blank,
> > or perhaps loaded but no longer usable, is 'dd' and appropriate tool to
> > completely clone the Good disk to the not so good
disk....therefor making
the
> > second disk identical to the first? Bootable and all?
>
> yes
>
> dd if=/dev/firstdisk of=/dev/seconddisk bs=64k
>
> and yes it is bootable, but if you boot from second disk, FreeBSD kernel
> will mount root from first disk anyway, unless you will reconfigure it.
>
Would this also work to copy CDs? If so, does it matter what os
and/or format
they would have?
You can get an image of a data cd with:
dd if=/dev/acd0 of=foo.iso bs=2048
You can then use burncd to make a copy. Also note that the block
size is important here.
-Glenn
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