Mounting/examining dd image?
lists at jnielsen.net
Sat Nov 3 09:53:43 PDT 2007
On Saturday 03 November 2007, Jon Drukman wrote:
> Hm, anything that works in Freebsd 4.9? I've never been able to
> install 5.0 or higher on this machine, it always freezes when booting.
In 4.x the analogous command is called vnconfig with slightly different
> On Nov 2, 2007 10:22 PM, John Nielsen <lists at jnielsen.net> wrote:
> > On Friday 02 November 2007, Jon Drukman wrote:
> > > I was trying to transplant my system from a small, old drive to a
> > > big, new one. I made a dd dump of the entire small drive, but then I
> > > accidentally destroyed the drive (be careful with bare drives and
> > > metal PC cases...)
> > >
> > > Anyway, I have the dd file but I don't have a spare drive onto which
> > > to copy it. Is there a way to read its contents/mount it/explore
> > > it/hopefully extract files from it on a running system?
> > Yes there is:
> > mdconfig -a -t vnode -f "/path/to/dd/image/file"
> > That will cause the file to be treated as an md device. See also man
> > mdconfig. The output of that command is the newly created /dev/md?
> > device node. Depending on whether you dumped the whole disk, a slice,
> > or a partition there may be additional devices. If you dd'ed the whole
> > disk your former root partition might show up as /dev/md0s1a, for
> > example.
> > Once you've identified the device node(s) that contain(s) the
> > filesystem(s) you're interested in, just mount it/them like you would
> > any other device, e.g.
> > mount /dev/md0s1a /mnt
> > JN
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