Very Computer

Hi all,

Is there a linux software to convert windows *.ngr cd images to standard iso
cd images?

I tried to mount a nrg image with the loop device using "mount -t iso9660
savedfiles.nrg /mnt/loop/ -o loop,offset=xxxx", with different offsets but I
did not succeed.

Thanks,

-- Alain

On Sat, 20 Apr 2002 17:48:51 +0200, Alain Basty staggered into the Black
Sun and said:

Quote:> Is there a linux software to convert windows *.ngr cd images to
> standard iso cd images?

Which *y stupid program created these nonstandard files?

Quote:> I tried to mount a nrg image with the loop device using "mount -t
> iso9660 savedfiles.nrg /mnt/loop/ -o loop,offset=xxxx", with different
> offsets but I did not succeed.

If these nonstandard files actually contain an ISO9660 image with some
extra data tacked on to the header, you can use utilities like od or any
hex editor to find where the ISO9660 image starts.  Like so:

od -Ax -s /tmp/file.iso

008008 LINUX                           SU7300.001
(more junk...)

The volume label for an ISO9660 image starts at 0x8000 bytes into the
image.  So find where the volume label is in this .NGR file, then
determine the offset and feed that to mount.

If this NGR file is not an ISO9660 file with a wrapper around it, you
might be out of luck unless someone has managed to reverse-engineer this
file format.

--
Matt G|There is no Darkness in Eternity/But only Light too dim for us to see
Brainbench MVP for Linux Admin /
http://www.veryComputer.com/     /  "He is a rhythmic movement of the
-----------------------------/    penguins, is Tux." --MegaHAL