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Cake day: July 9th, 2023

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  • One more interesting feature was the “write lock” switch on the 3.5" ones, a sliding button that covered one of the squared holes on their edges. The floppy drive would sense that and refuse to write on them.

    On the 5.25" it was a notch cut on the side (there were punchers for that). To write on a “protected” disk, you’d cover the notch with adhesive tape.



  • It’s the guts of 3.5" floppies, like these, they usually stored 720kB, then 1.44MB, but the latest versions (double sided) were 2.88MB.

    The larger one at the bottom is from a 5 1/4" (orange in this picture, the big daddy in the picture is 8", first type I used, with COBOL)

    … and now you kids know where the “save” button icon came from.

    They were not meant to be removed from their protective envelopes, they’re probably damaged now.