8" Floppies

From: Don Maslin <donm_at_cts.com>
Date: Fri Aug 31 16:32:44 2001

On Fri, 31 Aug 2001, Don Maslin wrote:

>
>
> On Fri, 31 Aug 2001, Richard Erlacher wrote:
>
> > Well, if the written spec's can be believed, you can't SEE the difference
> > between DD and SD media. That doesn't change the fact that they have different
> > spec's. Further, DS media are certified on BOTH sides, while the emulsion on
> > one side may be defective.
> >
> > It's true that DS media have their index hole located differently than SS media.
> > The index timing is different, according to some drive makers, albeit not VERY
> > different. At least one mfg spec's the DS drives with 160 microsecond +/- 50
> > from the start of /Index to the data burst, while SS media are at 200. I've
> > never given much thought to this and how it affects things, but I am not
> > comfortable with the notion of switching, mechanically, between the two sensors.
> >
> > Dick
>
> Probably of little consequence, Dick, since his DSDD disks will not be
> readable by anyone else unless the have performed the same modification
> to a single-sided drive.
> - don
>
Oops! Obviously, I meant and should have said "double-sided drive".

                                                 - don
Received on Fri Aug 31 2001 - 16:32:44 BST