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 < [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 >
