I never ran into that, having repurposed several hundreds of DD floppies for HD ... | Hacker News

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daneel_w on May 29, 2023 | parent | context | favorite | on: Fitting 44% More Data on a C64/1541 Floppy Disk

I never ran into that, having repurposed several hundreds of DD floppies for HD use. But the opposite situation was common with many different brands of both 3.5" and 5.25" discs: HD floppies that were problematic to write to using a DD drive, because of different thickness and composition of the magnetic layer.

actionfromafar on May 29, 2023 [–]

Yes! One of the PCs at my school had a 720 3.5” drive.

Another twist with that. Writing with in 720 mode from a normal PC drive worked most reliably if the diskette first was formatted in the 720 PC.

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