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RSX Crash driver for VF?

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Rob Brown

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Jun 19, 2009, 6:22:34 PM6/19/09
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Customer system (11/84, M-Plus V4.6) piled up. Try to take a crash
dump. "Crash driver not loaded." Oh, well.

No tape drives on this system. No scratch disks. No removable
drives. The docs I have say DU, DL, MU, MS, MM devices only for crash
dump support.

Has anybody ever set up to crash dump to a virtual disk? Or why not
to a file a la VMS? Sounds like a worthwhile project. Given an
infinite amount of time and money, I might take a stroll through the
sources to see what I can see.

- Rob


--

Rob Brown b r o w n a t g m c l d o t c o m
G. Michaels Consulting Ltd. (780)438-9343 (voice)
Edmonton (780)437-3367 (FAX)
http://gmcl.com/

Dave Carroll

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Jun 19, 2009, 11:43:44 PM6/19/09
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Create a VF device which is contiguous, and modify the crash driver to start
writing there, then you could hard code in the VF device name etc, and CDA
would be able to get what was dumped ... A bit of work, but doable in a day
or so ...

-Dave

hea...@aracnet.com

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Jun 22, 2009, 7:54:27 PM6/22/09
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In vmsnet.pdp-11 Rob Brown <mylas...@gmcl.com> wrote:

> Customer system (11/84, M-Plus V4.6) piled up. Try to take a crash
> dump. "Crash driver not loaded." Oh, well.

> No tape drives on this system. No scratch disks. No removable
> drives. The docs I have say DU, DL, MU, MS, MM devices only for crash
> dump support.

> Has anybody ever set up to crash dump to a virtual disk? Or why not
> to a file a la VMS? Sounds like a worthwhile project. Given an
> infinite amount of time and money, I might take a stroll through the
> sources to see what I can see.

I assume you're unable to mount a virtual tape (or disk) to write to at this
point?

Zane


Rob Brown

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Jun 22, 2009, 9:25:56 PM6/22/09
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On Mon, 22 Jun 2009 at 23:54 -0000, hea...@aracnet.com wrote:

> I assume you're unable to mount a virtual tape (or disk) to write to
> at this point?

For me, by the time I decide that I want a crash dump, the system is
too hosed to do anything other than "c for continue" or "40g".

Rob Brown

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Jun 22, 2009, 9:27:02 PM6/22/09
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On Fri, 19 Jun 2009 at 21:43 -0600, Dave Carroll wrote:

> Create a VF device which is contiguous, and modify the crash driver
> to start writing there, then you could hard code in the VF device
> name etc, and CDA would be able to get what was dumped ... A bit of
> work, but doable in a day or so ...

Thanks for the advice, Dave. I thought that would be a worthwhile
starting point.

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