[clug-talk] Floppy Disks

[Kin Wong]

I am starting to feel really old now.  The notch was to allow the floppy to flipped over to use the other side.  The initial drives were single sided and the notch was sensed by a micro-switch.  The presence of the notch meant the disk was writeable, where an absence of a notch (covered up notch) made the disk write protected.

Yes, some of us penny pinchers use to purchase SSSD (single-sided single-density) disks and notched them and hoped the quality was good enough to use as (single-sided double-density).  I wonder if anyone has written this up in a wiki?