i wrote a little script:

#!/bin/bash
offset=0
until mount -o offset=$offset $@ > /dev/null 2>&1 ; do
  printf "offset=%d failed\r" $offset
  offset=$(($offset+512))
done
printf "Successful mount at offset=%d\n" $offset
mount

with it i was able to determine that i could mount the 1.3 image with an
offset of 8192

hope this helps anyone else trying to accomplish the same thing...

cheers,
jj

On Mon, Dec 28, 2009 at 1:51 AM, Joey Morin <joeymorin at gmail dot com> wrote:

> i've been trying to mount the generic-pc-1.3.img under linux as per:
>
>
http://www.linuxquestions.org/questions/debian-26/how-to-mount-freebsd-partition-from-debian-gnu.linux.-etch-4.0-583605/
>
> mount -o loop,ufstype=44bsd -t ufs generic-pc-1.3 /mnt/m0n0
>
> i've experienced the same problems as the users in the above link.  bad
> magic number.
>
> i poked around quite a bit, tried different versions of linux (ubuntu,
> insert) and the result is the same.
>
> years ago, i had succeded in mounting the image under slackware using the
> above technique.
>
> on a hunch i tried the same with 1.2... works just fine!
>
> so looks like the problem is that something has changed between 1.2 and 1.3
>
> anyone have any idea how to mount the 1.3 image?
>
> jj
>