CDC disk drives (was Re: what IBM system is this?)

5 Jul 2015

...

> I don't believe you're looking at a single system.  Note the banks of 
> CDC 844 disk drives in the foreground (you can even make out the 
> "Control Data" logo.
...

Chuck, I would have guessed these are 9756/9780 type of drives (100 and 200MB disk packs,
respectively). But I just saw that the 844-41 also uses "high-capacity" disk
packs (in contrast to the original plain 844). 

...
 From the physical appearance, they seem to look very
similar or even identical? Is there a way to distinguish these drives from a
looks/appearance point-of-view? 
Kind regards,
Pierre

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CDC disk drives (was Re: what IBM system is this?)