[Unix-jun72] rk03 vs rk05

Wilko Bulte wb at freebie.xs4all.nl
Sun May 4 19:06:53 AEST 2008

Quoting James A. Markevitch, who wrote on Sat, May 03, 2008 at 06:59:44PM -0700 ..
> > Confusingly, the 1e manual for /dev/rk0 says its an RK03. I'll have to go
> > read the DEC manuals, but I would guess that the RK11 drive and interface is
> > the same, but the RK03 and RK05 removable disk packs were of different
> > storage capacity.
> The controller is an RK11.
> The disk drives are RK02, RK03, RK05.
> The RK02 is a 1.2MB drive (256B per sector).
> The RK03 is a 2.4MB drive (512B per sector).
> The RK05 is a 2.4MB drive (512B per sector).

There was also a RK05F which used a fixed platter (in the same
plastic enclosure as the removables if I remember correctly).  That was
double capacity, around 5MB.


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