Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: dan@rna.nyu.edu (Dan Ts'o)
Newsgroups: comp.sys.sun
Subject: Re: DEC RA81 disk drive on a Sun 4/280
Keywords: Hardware
Message-ID: <8904080214.AA28654@rna.ROCKEFELLER.EDU>
Date: 25 Apr 89 11:31:10 GMT
Sender: usenet@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Original-Date: Fri, 7 Apr 89 22:14:00 EDT
X-Sun-Spots-Digest: Volume 7, Issue 246, message 3 of 12

>Does anyone know if it is possible to use a DEC RA81 with a Sun 4/280?  We
>are getting rid of our VAX, but it would be nice to keep the disk if
>possible.  Thanks.
>
>I seriously doubt it, unless someone has built a UDA-50 controller for
>a bus other than the Unibus.  --wnl

Well... it is possible, but I wouldn't recommend it.

There exist Q-bus to VME-bus converters (maybe even Unibus to VME-bus, as
well). Get a KDA-50 (? Q-bus to DSA controller) and put it on a Q-bus
backplane. Get the Q-bus to VME-bus converter and attach it to the Sun.
Then you get to hack up the uda.c disk driver from 4.3BSD VAX UNIX to work
on Sun OS.

All in all, not worth it...