07-15-2019, 10:16 AM
"Geometry" is all the same for disk drives. With a 1.2MB disk drive, you can read/write 360K, 720K, and 1.2MB disks. The only thing that matters is the TPI (tracks per inch) must match the type of disk you are dealing with. Some Commodore disk drives used 100 TPI drive mechanics, which can't be used with standard 96 TPI PC drives.