13 Jun
2007
13 Jun
'07
2:17 a.m.
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
Thanks
Rod
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Zane H. Healy
Sent: 13 June 2007 01:18
To: cctalk at classiccmp.org
Cc: cctech at classiccmp.org
Subject: Re: Boot CD
In Linux land you can download an ISO image and
burn a boot cd
that will install a system. Does anybody know if something similar is
possible with VMS?
The short answer is yes.
The longer answer is that an ISO image isn't really the right term as it
is an ODS-2 or ODS-5 format disk, but most people will understand what
you're asking. I recently created a logical disk on my VMS system,
copied data to it, and then FTP'd it to my Mac where I burned it to CD
and was able to access it on my VMS box.
I'm not sure if you're asking about being able to burn CD's on VMS, but
that is also possible, at least on Alpha and Itanium, and I believe that
as of
8.3 it is part of the OS. I've not done this, as it would be more
trouble to set this up than to simply FTP the file to my Mac. :^)
Zane
13 Jun
13 Jun
3:23 a.m.
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).
Antonio
6:23 a.m.
At 03:23 AM 6/13/2007, Antonio Carlini wrote:
Rod Smallwood wrote:
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
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). 
4:35 p.m.
Rick Murphy <rick at rickmurphy.net> writes:
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.
Yeah, important point original poster may need to know:
many VMS systems need cd-rom drives that can do 512 bit blocks.
Many early scsi cd-roms don't do 512 bit blocks, so try to make
sure the one you're trying to use can do this.
5:08 p.m.
Quoting "Andrew K. Bressen" <akb+lists.cctech at imap1.mirror.to>:
Rick Murphy <rick at rickmurphy.net> writes:
Some TEAC SCSI cd-rom drives, all Plextor SCSI cd-rom drives and some Toshiba
SCSI cd-rom drives (sun used Toshiba SCSI drives) can be jumpered for (or in the
case of the Toshiba) a trace or 2 cut at a location specifically for the purpose
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.
Yeah, important point original poster may need to know:
many VMS systems need cd-rom drives that can do 512 bit blocks.
Many early SCSI cd-roms don't do 512 bit blocks, so try to make
sure the one you're trying to use can do this.
6228
days inactive
6228
days old
4 comments
5 participants
participants (5)
-
akb+lists.cctech＠imap1.mirror.to -
arcarlini＠iee.org -
geoffr＠zipcon.net -
rick＠rickmurphy.net -
RodSmallwood＠mail.ediconsulting.co.uk