If one inserts an ED disk into a floppy drive, which supports sizes only up to HD, how does it cope with ED?


It doesn’t, at least not in any particularly useful way. Because of the position of the density sensor cut-out on ED floppy disks, they’re detected as 720K floppies by HD drives. Their contents can’t be read, but they can be reformatted as DD disks...

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  • 1
    And then? What happens then? Do they work as DD? – neverMind9 Jan 19 '18 at 20:15
  • 3
    Yes, with the limitations of DD disks written by HD drives (they don’t work reliably in DD drives). – Stephen Kitt Jan 19 '18 at 20:28

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