Re: Floppy disk density

["Pete Rittwage" <rcade@rittwage.com>]

Hey Paul,

The media itself is rated at 5600-5900 bpi (bits per inch) for double
density disks at 300rpm.  On a Commodore drive using raw GCR (sorry, that's
my background but I think Apple used the same technology) you can get about
7700 GCR encoded bytes on a track max depending on the density setting at
300rpm.

So no, a little more data, sure.  Double, no way.  If it were that easy they
would have done it 25 years ago.  :)


-- 
Pete Rittwage
http://www.rittwage.com

The C64 Preservation Project
http://rittwage.com/c64pp/

"Paul Guertin" <pg@sff.net> wrote in message
ld6bo0dsfpd7do52v48qgib11uu9ppft83@4ax.com">news:ld6bo0dsfpd7do52v48qgib11uu9ppft83@4ax.com...
> If you slowed down the motor of a Disk II drive to half its
> normal speed, could you reliably write twice as much data on
> a standard, double density floppy disk (assuming a customized
> RWTS)? There must be a range of allowable speeds for a floppy
> drive, and I wonder how wide that range is. Has anyone here
> done any experimenting or read literature on this subject?
>
> Paul Guertin
> pg@sff.net