[Info-vax] Issues with burning latest Hobbyist VAX/VMS ISO to CD?

[Hans Vlems]

On 5 apr, 17:21, BillPedersen <peder... at ccsscorp.com> wrote:
> I am following up on some queries I have been getting about issues with burning the latest Hobbyist VAX/VMS ISO to CD.
>
> I have a report from a hobbyist which suggests he gets a "the selected disk file isn't valid" error from just about any method he has tried to burn the CD with.  He has suggested the "ISO format is old".  He has apparently tried with Windows 7, ISO Buster, and CDBurnerXP without luck.
>
> So, I fully expect there are folks out there that have done this successfully, what did you use?  We would like to get this documented so we can help future Hobbyists.
>
> Thanks,
>
> Bill.

This is the way I make copies of cd media for VMS and Tru64.
The cd is copied to a disk image on a Tru64 system with the dd
command.
Example:
            dd if=/dev/cdrom0c of=vaxvms073.dd

When such a file is copied to a VMS system it may be mounted as a
logical disk:
      $ LD CONNECT VAXVMS073.DD
      %LD-I-UNIT, Allocated device is LDA1:
      $ MOU/OVER=ID LDA1:

The dd command preserves all information on the original cd in the
output file. I'm fairly sure that
dd is cluless about FILES-11, ODS-2 or what have you, it just copies
the data. The internal filesystem
information is of course used by the mount command. Not sure whether
LD looks inside though.

To burn a fresh copy the dd output file is copied to a Windows XP
system that runs Nero V6.
Now to burn an image to cd Nero only recognizes files that have either
the .iso or the .nrg filetype.
This is probably where the confusions starts regarding the  "ISO
format".
Anyway, it is sufficient to rename VAXVMS073.DD to VAXVMS07.ISO and
burn that file.
The resulting copy is bootable on the intended platform, provided the
original was bootable.
Works for me!
Hans