[Simh] vms 5.5-2 cdrom format

[Tim Shoppa]

> does anyone know whether i can create an "iso" image from my
> VAX6000 5.5-2 "VMS Consolidated Software Distribution" CD#1
> to install VMS with simh on linux?
> [dd]
> but following the procedures in
http://www.wherry.com/gadgets/retrocomputing/vax-simh.html
> to boot dua3 gave me the following error
> -DUA3
> ?42 NOSUCHFILE, DUA
> HALT instruction, PC: 00000C1A (MOVL (R11),SP)

Condist CD's typically contain only layered products and not the base
operating system.  The CD itself isn't bootable so the image isn't
either...

Bootable VMS CD's will have volume labels something like "VMS055"
or "VAXVMS071".

> i am not sure what the difference between iso9660 format and ODS-2

"ISO" originally meant ISO-9660 CD filesystem format.  But in common
use "iso image" now means "a block by block image of a CD no matter what
its filesystem".  So we end up with oxymorons like "iso image of a
ODS-2 volume".

Tim.