Strange RK03 / RK05 clone with Plessey-controller

From: Pete Turnbull <>
Date: Tue Jan 18 13:02:55 2005

On Jan 18 2005, 17:40, Pierre Gebhardt wrote:

> The most interesting thing: A Cipher disk drive Model: SF-1221 with a
Plessey controller PN: 703340-101J.
> A 50pin cable goes to some sort of Plessey converter, another 50pin
cable from the converter to the cipher drive.
[ ... ]
> Moreover, I found a disk pack which goes with the drive: DEC 2200
> Is this a RK03 or RK05 pack ?

AFAIK, an RK03 pack and an RK05 pack are completely interchangeable
(someone please correct me if I'm wrong), and certainly have the same
capacity and layout. The drives are different; RK03 drives were made
by someone else (Diablo, IIRC) and rebadged by DEC, whereas the RK05
drives were actually made by DEC, and have a faster access time.

If it helps, that Plessey part number is an RK05 controller.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Tue Jan 18 2005 - 13:02:55 GMT

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