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

[P Gebhardt]

> 

> 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