

This raised the following question: How do both applications know the start of the first sector and the end of a the last sector of a floppy disk, in order to accurately visualize it on an image (FDM) or progress-like bar (NDD)? When is the disk in the proper direction visualized, assuming sector 1 starts at position twelve-o'clock on the left visualization and on 0% in the second visualization.

I've recently found a more modern application "Floppy Disk Master-7" (Picture 2) (FDM) that visualized the bad sectors, tracks and clusters (Picture 1) on a floppy disk in a similar (but fancier) way to the older "Norton Disk Doctor" (Picture 3) (NDD).
