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

P Gebhardt p.gebhardt at
Sun Jul 5 05:01:09 CDT 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,

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