23 Dec
2025
23 Dec
'25
2:48 p.m.
Hey Christian!
Oh you have one of these too? I thought I was the only person with the
mighty Plessey 4 RK05 disk drive system. I have one drive, the
bulkheads/cables, and of course the weird Plessey controller for it. And
a couple of packs.
This drive system is a Diablo 44 (I think) model with 10mb on a fixed
platter and 10mb on a removable RL01 like cartridge. It's pretty heavy,
top loaded with a front door, I think it pulled out of the cabinet on
rails. The controller mapped each head as an RK05 so you wound up with
DK0 and 1 on the removable platter and DK2 and 3 on the fixed platter.
Mine does not spin up currently (last tried it a few years ago) and if
there are others with this system I'd love to start a thread here or on
the forum. It did work; I used to run RSX11M 3.2 on it and used it as a
multi player gaming system for science fiction conventions in the 1980's.
CZ
On 12/23/25 04:13, Christian Corti via cctalk wrote:
On Mon, 22 Dec 2025, Christian Corti wrote:
Nope. Those are different drives. Mine has 2
*physical* RK05 drive IDs
for each platter. Look at (PDF) pages 12-13 in this file:
http://www.bitsavers.org/pdf/plessey/peripheral/Plessey_Minicomputer_Add-On…
Uh, well, you are describing the top loader drive that uses IBM 5440
style cartridges, i.e. physically like the RL01 cartridges. Something
completely different from what we are talking about. This thread is
about 2315 type cartridges for front loading drives ;-)
Of course, your drive has twice the capacity of an RK05 drive.
Christian