Boot CD - test-drb@ccmp.vtda.org

13 Jun 2007

Here's my ROM Burner

ImgBurn supports a wide range of image file formats - including BIN, DI,
DVD, GI, IMG, ISO, MDS, NRG and PDI.

-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Rick Murphy
Sent: 13 June 2007 11:24
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: Boot CD

At 03:23 AM 6/13/2007, Antonio Carlini wrote:
...
 Rod Smallwood wrote:
 > Hi
 >    Its down load image to a PC then burn CD ROM. Then boot CD on VAX.
...
   My CDROM
burner may not know about ODS-2/-5 I'll check 
If you have a binary image of an ODS-2 disk you can certainly transfer 
it to a PC and burn it to a CD-R which you can then use to boot a VAX. 
I've done that. The exact way you burn it will depend on the burning 
software, but basically you choose the mode that says "this is a 
physical image, trust me and burn it block by block".

I've done this plenty of times in the past. It is even possible to 
build a hybrid CD where there is an ODS-2 structure and an ISO9660 
structure and they can even share data (files visible in both, but only 
...
 stored once on the CD). 
That's largely due to the fact that ODS-2 and base ISO9660 formats are
the same (other than block sizes.) VMS Engineering apparently had a lot
to do with the 9660 standard. The directory structures are the same,
including an RMS file control block in the directory entry. That's also
why ISO files have version numbers, just like VMS.

I wrote a VMS ACP for handling ISO disks many years ago that took
advantage of this. The intervening decade or so may have some of the
details wrong but most of what the software did was just reblocking to
cast the 2048 bit CD data into 512 bit blocks.
         -Rick