>On a 5-1/4" diskette, normal blank media has a notch in the
>upper right corner (on the side).  The presence of the notch
>tells the system that it is allowed to write on the diskette.
>
>To write protect the diskette, you applied a "write-protect
>tab" to cover the notch.  You stuck it to the front, folded
>it over the edge, and stuck it to the back (and itself via
>the notch).

It was the other way around on the predecessor 8 inch diskettes. I am not
sure why it was changed for the 5.25 ones, but it may have been for the
reason you mentioned, production disks not needing a notch to protect them.

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