Re: I've never seen (or heard of) hard-sectored floppy disks before
By the time of the IBM PC, disks were mostly soft sector. But before (and overlapping) that, there were a zillion disk formats. I had software (UniForm) that could do many of them, and there were a lot of hard-sector formats listed. Before that, I used IBM 8 inch, and those were soft-sectored. Never did run into hard sectors, think by the early 1990s they were not common. There's a list at stackexchange but I remember there being more.
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