On Mon, 5 Sep 2011 22:41:35 -0700, you wrote: Does anyone have any pointers for making an ISO image of the CD? Am I doing it wrong? I would like to make a backup of the disk because I'm already on my second physical copy and would like to back it up before I lose it again You may already know, but... Please note that a VMS CD-ROM bootable image is not ISO 9660 formatted. So don't be misleaded if a correctly made image does not mount on Linux or whatever (or does not show up on Windows): don't take that as a test! The only way to check for a VMS CD-ROM image integrity is by having it booted or mounted in VMS. There is also a vmscd utility that can be used to inspect and extract data from such an image on Linux. Just look for it with Google. There is no difference between a VMS CD-ROM bootable image and a classical VMS hard disk image: they are both structured as an ODS-2 filesystem. Anyway, VMS can also mount and use ISO 9660 CD-ROM data discs and images. HTH, :-) G. P.S. Itanium-bootable images are different.