8 inch floppies
nw.johnson at ieee.org
Sat Oct 26 16:52:03 CDT 2019
In all my years of electronics troubleshooting, I have never spent hours
under a microscope :-) OK, it was easier using the RTL of the Univac
418, but even today the parts are big enough to see!
On 26/10/2019 17:42, Fred Cisin via cctalk wrote:
>>> Hidden behind a NYTimes paywall, . . .
>>> news yesterday that the 8 inch drive nuclear weapions system has now
>>> been updated.
> On Sat, 26 Oct 2019, John Foust via cctalk wrote:
>> And what media or method did they upgrade to? Top secret?
>> Here's a different version of the story:
> Thanks for the URL
> Amusing that requiring repair technicians having ability to "solder
> metal" was one of the major problems.
> The USUAL progression from 8" floppies was to 35 track (later 40
> track) single sided (later double) FM single density (later MFM) 48tpi
> (later 96tpi) 5.25".
> But, an easier conversion would be straight to "1.2M", which would
> need few hardware changes other than a custom cable.
> (In fact, the first Mitsubishi 1.2M drive that I got had a 50 pin
> connector; later 4854s had a 34 pin connector)
> But, why not cards or paper tape?
> Or, if they want to expand speed and capacity, ST506, or even ST412.
> They could go to thumb drives, such as Stuxnet
> Or, was the main goal to give it a publicly accessible IP address?
> ("War Games" is playing on MPLEX right now)
> Besides convenient recreational Facebook access for staff technicians,
> why is web browsing implemented on MRI control computers or on WOPR?
> BTW, the superceded drives and media will remain "classified" until
> they crumble, and our surplus channels will not get a sudden major
> influx of available media.
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