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Old 16 November 2016, 21:46   #13
demolition
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Join Date: Sep 2012
Location: Copenhagen / DK
Age: 37
Posts: 3,248
My guess is that it can be caused by mold inside the floppy if some disks are worse than others. If you listen closely, you can hear the periodic variation in the rotation. I can clearly hear it on some disks and not on others.

Imagine a floppy which has been sitting still for 20 years and mold develops in one area for whatever reason. It will spread out on the magnetic surface as well as the cotton layer inside and every time the two areas meet when it rotates, it creates some extra drag.

Now if the problem is the same with all floppies, then my guess would be a sticky motor/bearing. Just use another drive.
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