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From: steved@longs.LANCE.ColoState.Edu (Steve Dempsey)
Newsgroups: comp.sys.dec
Subject: DEC RDxx (ST506) drives (was Re: hard drives for q-bus
Message-ID: <14280@ccncsu.ColoState.EDU>
Date: 16 Apr 91 19:35:00 GMT
References: <1991Apr16.055810.1249@spcvxb.spc.edu> <1991Apr11.114144.79@ulkyvx.bitnet> <1991Apr15.190345.5198@ni.umd.edu>
Sender: news@ccncsu.ColoState.EDU
Reply-To: steved@longs.LANCE.ColoState.Edu (Steve Dempsey)
Organization: Engineering College, Colorado State University
Lines: 33

In article <1991Apr16.055810.1249@spcvxb.spc.edu>, terry@spcvxb.spc.edu
(Terry Kennedy, Operations Mgr.) writes:
> In article <1991Apr15.190345.5198@ni.umd.edu>, mike@UC780.UMD.EDU
(Mike Santangelo) writes:
> 
> > Well, the DEC RQDX3 uses MFM & ST506 connections ...
> > These are really just off-she-shelf ST506 hard disks

>   The RD54 is a modified Maxtor XT-2190, the 53 is a modified Micropolis
> 1325, the 52 is either a Quantum Q540 or an Atasi 3046, but _never_ an
> Evotek 5540 [That's an in joke], and the 51 is an ST-412.

And let's not forget the `32, a Seagate ST251[-1], which does
not appear to be modified.

BTW, we recently had trouble replacing RD54s in VS2000 systems.
A 3rd party sold us some XT2190s; some worked and some did not.
Strangely enough, we received two drives with sequential serial
numbers, of which one works and one does not -- bizarre!

The vendor sez that Maxtor sez the modified XT2190s were overrun
and got randomly distributed -- you're lucky if you stumble on
the modified ones.  Anyway, this vendor is the first we've had
these problems with.  They can't deliver any more drives guaranteed
to be RD54 compatible.

Anyone know the real scoop on the RD54?


        Steve Dempsey,  Center for Computer Assisted Engineering
  Colorado State University, Fort Collins, CO  80523    +1 303 491 0630
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