[vcf-midatlantic] VAX/RD54 recovery

Jeffrey Brace jeffrey at vcfed.org
Sat Aug 1 13:11:44 EDT 2020


There is a repair workshop on Aug. 15 & 16. You are welcome to join us!
Lots of people including David will be here!


On Sat, Aug 1, 2020 at 12:52 PM Connor Krukosky via vcf-midatlantic <
vcf-midatlantic at lists.vcfed.org> wrote:

> David,
> Those drives are safe at my house, the museum seemed to have no interest
> in them since if they planned to get any machines going they planned to
> run some of your boards and not original drives even if they did work.
> Glad to see you were able to get the head amp board hooked up to one of
> these. We should be-able to recover what was on the original drives.
> I have not attempted anything with them myself but I have one of your
> boards I plan to build up with a future digikey order.
> I have been working on some new boards I designed I need to get up and
> going not related to vintage computing.
> The next time I am at the museum I can drop them off somewhere so you
> can look at them if you'd like.
> I believe I was not able to get MOP booting working on the Vax... I
> believe it was an issue with it being a Microvax II. I really ought to
> drag my Microvax II up and see if I can attempt to get it net booting. I
> have only gotten later Vaxen going with my MOP boot setup. Specifically
> a 3900 and some 3100s.
> -Connor K
> On 7/26/2020 10:47, David Gesswein via vcf-midatlantic wrote:
> >     I had gotten a RD54 and worked out how to pull the head servo for
> data
> > recovery.
> > http://www.pdp8online.com/mfm/head_servo/pics/rd54_wires.shtml?small
> >
> > At a previous workday a VAX was being worked on for the Museum. The
> drive in
> > it had head position errors so I wasn't able to get a good read at the
> time.
> > With the above method I probably can read it now. If the drive is still
> around
> > and not reformatted I can try at the next work day. I think their was
> another
> > drive that wasn't read from a PDP-11 also.
> >
> > Did the VAX get a new OS install on it?

Jeff Brace
Vice President & Board Member, VCF East Showrunner
Vintage Computer Federation
jeffrey at vcfed.org
cell: 732-759-1783


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