Yep After sleeping it off, I think the spindle ring was on RP03/Winchester style packs, Or maybe I'm hallucinate like chatgpt, Pushing 70 and feeling it. I can't believe I was running up and down stairs at HP just 8 years ago. Feels like 100.
On Mon, Dec 22, 2025 at 8:44 AM Jim Davis <[email protected]> wrote: > I used DEC for years, from straight -8 and the11/45 at OMSI west lab, to > Metheus BSD 4.1/4.2, Sys V and RT-11 to the 90's with microvax, Those were > the days when it actually felt like you helping humanity, making life > better. Not any more. > > On Mon, Dec 22, 2025 at 7:43 AM Nadav Eiron via cctalk < > [email protected]> 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-Ons_and_Peripherals_ca_1975.pdf >> I believe you're describing the PM-DD/11B and I have the PM-DD/11C. I have >> them on a PDP-11/45, so OS/8 isn't part of the equation :) >> >> Nadav >> >> On Mon, Dec 22, 2025 at 12:48 AM Christian Corti via cctalk < >> [email protected]> wrote: >> >> > On Thu, 18 Dec 2025, Nadav Eiron wrote: >> > > I have such a drive connected to an 11/45. It's branded as Plessey. >> The >> > > drives are double density RK05 compatible (i.e., it's like an RK05F + >> a >> > > "removable RK05F" with a specially marked removable pack that looks >> > >> > We have a couple of those, all branded as Plessey, but they are Wangco >> > type F drives. They have one fixed and one removable platter. >> > It is like two RK05, not RK05F. >> > >> > > physically like an RK05 pack) and present as 4 RK05 drives to the >> > > controller - two on the fixed platter and two on the removable one. >> > Haven't >> > >> > This would be on the PDP-8 / RK8E where each platter is divided into two >> > parts because OS/8 can't handle as many blocks as one entire platter >> has. >> > This makes your 4 logical drives, but it is still only like two RK05 >> > drives. >> > >> > Christian >> > >> >
