> 
> Far more than you wanted to go through:
> 

Fred,

Not at all. As always lots of wisdom condensed into a short post. This one
is going into my "Posts to Save" folder!

> "2.8M" has an unformatted capacity of 4M
> The disk that you linked a picture of says "406TPI"!
> Therefore, it presumably has about three times as many tracks. (240?),
> which, if it does a 1,000,000 bits per second, with track density the
> same
> as "2.8M", would give it an UNFORMATTED capacity of 12M, and a
> formatted
> (data) capacity of about 8.5M.
> 

Perfectly predicted and exactly as the PR announcement and info I have found
says it should be! 

>From Wikipedia:
https://en.wikipedia.org/wiki/List_of_floppy_disk_formats#Physical_compositi
on

Density         Tracks  tpi             bpi             Coercivity
Unformatted capacity per side
Triple[14]      240             406.5   36,700                  6,500 KB

-Ali

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