Diablo 30 power

[Tim Shoppa]

> The disks have a "-8" designation on the edge, where the RK05s have
> the -16.

I'm guessing this is the count of number of sector pulses per revolution
of the pack.  There are notches on the hub that generate these.

PDP-8 RK05's are 16 sectors, PDP-11 RK05's are 12 sectors.

I don't know about the RK01, but the RK02 through RK05 (excluding
RK05F) all present the same geometry.

In non-DEC uses, I believe there were 8-sectored packs in common use.

Tim.