@punkyclown
Exactly as LoadWB said. HD disks have quite different coercivity from DD disks which makes writing them with a DD-profiled head generally unreliable, prone to corruption after some time.
I did not experience it. Sure, I did not write like thousands of floppiness, but it all was fine.
BTW. I have device to make a DD floppy discs into HD
. It is literally a "hole cutter"! People were doing things like this about 25 years ago.
