[Coco] 1.2 MEG DRIVES might be ot

[Mike Pepe]

> 
> People keep saying this, but I've been using switchable 40/80 track 
> drives for about 20 years now and never encountered this problem :)
> 

You've been very lucky, or maybe you're not doing what we think you are.

If you bulk-erase the disk first, it'll probably work. If you've got old 
40-track data and write new data over it with a double-stepping 80 
tracker, the half-width new track and the other remaining half of the 
old track will make a mess that's not readable by another 40 track-only 
drive.

I suppose if you never interchange with real 40 track drives, it will 
probably work ok.