Is possible rebuild a cut floppy disk & retrieve data?

http//en.wikipedia.org/wiki/Modified_Frequency_Modulation

Single density is FM. Typically this died with 8" IBM disks

Some very early 5.25 disk were single density, but most were 40 track double density (360K) or 80 track, High density, 1.2MB

I am not aware of a 3.5" disk that was ever single density, always double density (720K)or high density (1.4M) Extra density was 2.8M but never caught on.

Double and high density all use MFM (with conditional clock bits).

Sorry I was just talking about 3.5" disks - I haven't seen a 5.25 for about 15 years

It's been possible since the '90s
http//www.csoonline.com/article/219226/computer-forensics-investigations-body-of-evidence

Nice! The snodgrass case is THE case that made me interested in forensics in the first place. The solution was brilliant, I remember that they developed a method to warm up the cut up and bent pieces with a soldering iron without melting it by attaching a metal to it that would reduce the heat just enough to make the disc go back to normal - absolutely brilliant!