Hi,

I think that only worked on the Commodore 64 and likes, where the drive did
not use the index hole to identify the start of sectors/tracks. Punching a
hole there was much harder operation, than cutting a new write protect
notch.

Szanolcs
2016.07.02. 2:16 ezt írta ("Dave Horsfall" <dave at horsfall.org>):

> On Fri, 1 Jul 2016, Marc Rochkind wrote:
>
> > Those original floppies were I believe 160K. If you paid extra, the box
> > would hold two drives. Later, IBM introduced double-sided drives, at
> > 320K each.
>
> Those in the know, of course, simply put a notch on the opposite side.
>
> --
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will
> suffer."
>
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