Help identifying a big ol' drive platter

[Josh Dersch]

Chuck Guzis wrote:
> On 22 Jan 2009 at 3:42, William Maddox wrote:
>
>   
>> I've seen large platters like this on head-per-track disks
>> made by Burroughs.  There's one on the Illiac IV at CHM.
>> I saw a similar drive at CMU that was allegedly the swapping
>> disk for a DEC KA-10.  I vaguely remember being told that
>> the capacity was 512K words (36 bit on the KA-10).  The
>> drive was designed for speed, not capacity.
>>     
>
> Could also be from one of the vertically-mounted Bryant disks.  I 
> used to have one of those platters in my office; thought about making 
> a coffee table of it, but the hole in the middle was a problem.
>
> IIRC, they didn't spin very fast--about 600 RPM.  The heads were very 
> heavy.  
>
> There are photos and specs for Byrant units on the web.
>
> Cheers,
> Chuck
>
>
>   
Wow, that's quite a drive!

Found a brochure of sorts at 
http://archive.computerhistory.org/resources/text/Bryant/Bryant.Model2.1965.102646212.pdf.  
(Gotta love the gal they have on the cover :)).

Unfortunately these drives have 39" platters according to the above, so 
they're not what my platter came from... very cool, though :)

Josh