Lisa "twiggy" specs (Was: selling a blank floppy disk

From: Don Maslin <donm_at_cts.com>
Date: Sat Jan 2 18:47:52 1999

On 3 Jan 1999, Eric Smith wrote:

> Don Maslin <donm_at_cts.com> wrote:
> > Does that imply that the flux density on side one differs from side zero
> > at the same cylinder? If so, why.
>
> The heads are not actually directly opposed. The head on side 1 is slightly
> closer to the spindle, by 2.117 mm on standard 5.25 inch drives. This
> makes the tracks on side 1 about 13.3 mm shorter than those of side 0.
> Since side 1 has the same number of flux transitions in a shorter space,
> the flux density is higher.
 
The offset is approximately equal to the spacing of 3.8 tracks then!
That is surprising!
                                                 - don
 
Received on Sat Jan 02 1999 - 18:47:52 GMT