Everhart, Glenn
From:	John Vottero [John@MVPSI.com]
Sent:	Friday, July 31, 1998 11:29 AM
To:	Info-VAX@Mvb.Saic.Com
Subject:	RE: dual formatted cd-roms?
ISO 9660 reserves the first 64 blocks of a disk.  This is enough room
for the ODS2 stuff, you just have to keep ODS2 out of the ISO 9660 area.
So, on a 100,000 block disk, with a 50,000 block ISO 9660 partition,
ODS2 would have blocks 1-64 and 50,065 through 100,000 and the ISO 9660
disk would have blocks 65 through 50,0064.  The easiest way to reserve
blocks 65 through xxx for the ISO 9660 disk is to mark them as bad when
you initialize the ODS2 disk.
  
Here are the basic steps for creating a hybrid ISO 9660/ODS2 CD-ROM:

1. When you initialize the VMS disk, specify /BAD=(65:xxxx) where xxxx
is the number of blocks you want to reserve for the PC data. 

2. Create an ISO 9660 image file which contains the PC content.

3. Copy blocks 65 through xxxxx of the ISO 9660 image file to blocks 65
through xxxxx of the ODS2 disk.

4. Write the whole ODS2 disk to the CD-R.

When I do this, I use the VD driver from the VMS Freeware CD to create
an ODS2 container file.  I use CDRWin from www.goldenhawk.com to create
the ISO9660 image (although I think Easy CD can do that too).  Then I
ftp the ISO9660 image to VMS, merge it with the VD, ODS2 image and use
CDWRITE20 to write the whole thing to a CD-R.

Let me know if you have any questions or you need the code for COPY_ISO
(to merge the two image files) or CDWRITE20.

John Vottero

> -----Original Message-----
> From:	Tom Williams [SMTP:williamst@atcf.ncsc.navy.mil]
> Sent:	Thursday, July 30, 1998 6:47 PM
> To:	Info-VAX@Mvb.Saic.Com
> Subject:	dual formatted cd-roms?
> 
> As I was browsing DEC's (Compaq's) VMS web page, I noticed that with
> VMS 7.2 the online documentation will come on a dual-formatted CD-ROM.
> How does one go about making one of these? I can make VMS-formatted or
> ISO-formatted CD-ROMs on my Infoserver, and I've got Adaptac's EasyCD
> Creator on an NT box for making CD's readable disks, but I'd like to
> be
> able to make one CD readable by both VMS and W95, with long filenames.
> 
> The ISO 9660 format with the Infoserver gives me 8.3 filenames, and
> Joliet format gives me long file names, but I can't read Joliet CD's
> on
> my VMS system.
> 
> Thanks in advance
> 
> Tom Williams
> williamst@atcf.ncsc.navy.mil