22 Dec
2025
22 Dec
'25
10:01 a.m.
Sorry, It's been a long time, I forgot about the sector slots in the hub
ring.
Jim
On Mon, Dec 22, 2025 at 12:48 AM Christian Corti via cctalk <
cctalk(a)classiccmp.org> 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