Some time ago, Atari shipped quite a few disk drives with a "bug"
which made the system not recognize a disk change.  I understand that such
drives can be exchanged.  If, however, you don't want to do that, or if
you've upgraded a single-sided drive to a double-sided one and found that
you were "lucky" enough to get a double-sided mechanism with this problem,
here's a fix:

> Article 11478 of 11544, Tue 19:19.
> Subject: Re: Attaching a CHINON drive to the ST (the saga continues...)
>
> To get the drive to acknowledge a media change, run a jumper from pin 2
> to pin 28 on the drive's 34 pin connector.  As you look at the mech from
> the REAR, pin 2 is the top left pin, 28 is the 4th pin from the right.
>
> Atari's drives combine media change (pin 2) and write protect (pin 28)
> into one pin.  This is why you can't get a media change without this
> jumper.
>
> However, be sure and try to write to the disk after you do this.  If the
> computer gives a constant "Disk write protected" warning, then disconnect
> the jumper.  I have this problem.  My Teac mechanism doesn't have a
> strong enough write protect signal to make it with the two wires
> connected.  However, I doubt you will have this problem.
>
>		Chris Freemesser, Rochester Institute of Technology
>		Bis spaeter!

	I've performed this modification on the Tandy drive I bought a few
months ago, and it works fine.  That Tandy has a Teac mechanism, so the
problem mentioned in the posting doesn't necessarily apply to all Teac
drives.

		--Rod Smith