[pups] What hard drives to look for for PDP-11 use?
Steven M. Schultz
sms at moe.2bsd.com
Thu Oct 12 13:07:14 AEST 2000
Hi Bob -
> From: rdkeys at unity.ncsu.edu
> Steven.... I have been thinking of trying to find a PDP-11 of some sort
> (like hunting for needles in a hay stack in this part of the woods, but
Interesting. I wouldn't have thought an 11/73 or similar would
be too hard to find.
> 1. What mfm hard drives from the non-DEC world could be adapted to
> work on a PDP-11?
Tim has already jumped in with a pointer or two.
> 2. Can any scsi drives be used (RZ-23's or that kind of thing?).
Oh yes! But you need to have a Qbus SCSI<->MSCP controller. They
are easy to _find_ but quite *expensive*. Not as expensive as
they were when I shelled out US$1500 for a new Emulex UC08 (and that
with a good discount - the sales person was sympathetic to my
explanation this was for a 'hobby'). Used CMD, Emulex or Dilog
controllers will run around $500-900.
Once you have gotten over the sticker/exchequer shock the upside
is that you can use about many SCSI disk or tape drives that other
folks are tossing otu because they're too small. The older ~300MB
and 1GB disks that are not useful on modern systems are great in
a PDP-11 environment. Uh, don't bother putting a 73GB Cheetah
on an 11 ;)
One place that lists CMD and Emulex controllers is:
http://www.ficompinc.com
> I will assume the target OS is 2.11BSD or 2.9BSD, since those seem
> to handle the greatest assortment of hardware types.
>
> Can any of these non-DEC drives be adapted to MVII use?
At one time I had a uVax-II with a Dilog DQ696 (I think that was
the model number) that had a couple ESDI drives on it - a ~300MB
Miniscribe disk and a couple Maxtor RD53 sized drives.
> Can any of the early MFM or ESDI Sun drives be used?
Definitely. Emulex QD33 and QD35 adaptors (in addition to the
Dilog DQ696) ring a bell as far as non-SCSI disks go.
Steven Schultz
sms at moe.2bsd.com
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