You do need a very strong magnet. I’ve put 3.5 floppies on top of a mag tape demagnitizer ( not technically called that, but you know what i mean) and it had no effect at all. I could still read them fine in my pc. I surmised that the magnetic field generated was not strong enough to get through the plastic disk shield. Gave up after that.
Sent from my iPhone > On May 6, 2024, at 03:28, Just Kant via cctalk <cctalk@classiccmp.org> wrote: > > I have a vague recollection of someone telling me there was a trick to > demagnetizing high density disks. Perhaps wave a magnet in various ways, even > moving the magnet to and from the disk's surface. Then again maybe it's just > a chatgpt style hallucination. Wouldn't hurt to try though.
