12" Floppy Disks

Paul Koning paulkoning at comcast.net
Tue Sep 15 12:21:03 CDT 2015

> On Sep 15, 2015, at 1:11 PM, tony duell <ard at p850ug1.demon.co.uk> wrote:
>> There was also an RK08, as I recall -- same platter as the RK11/RK05 but 16 sectors per track instead of 12.
> I thought the RK(0)8 was the controller for a PDP8 system. I have an RK8E in my PDP8/E, it links to
> a normal RK05 drive.
> It does indeed use 16 (hard) sector packs, unlike the 12 sector ones used in the same RK05 drives 
> linked to an RK11 controller (RK11C, RK11D, RKV11D) on a PDP11.

Yes, that sounds right.  The terminology gets a bit confusing.  I thought the drives were actually different because of the sector count, but it sounds like that's handled in the controller and the drive doesn't care.


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