Re: After 20 Years, I'm This Close To Finally Escaping Data Rot -Thoughts?

["winston19842005@yahoo.com" <winston19842005@yahoo.com>]

On Feb 25, 9:30 pm, "Bill Garber" <willy4...@garberstreet.com> wrote:
> "D Finnigan" <dog_...@macgui.com> wrote in message
>
> dog_cow-1267150605@macgui.com">news:dog_cow-1267150605@macgui.com...
>
> > Michael J. Mahon wrote:
>
> >> Just out of curiosity, what is the technique for making a
> >> second index hole in the jacket without damaging the media?
>
> > I noticed that many of the disks which I inherited had
> > been punched with a standard, hand-held paper hole punch.
>
> You may be referring to the Write-Protect Notch.
> The hole we are referring to is the small hole
> near the hub which sets up the start of each track
> on some drives. Apple disks don't actually use it,
> but, if it isn't there on the flip side when trying
> to read it with an IBM drive, it won't work.
>

They didn't use it at all? Now thinking back, I remember the TI-99
only uses it for the format routine, and thereafter there is an index
pulse/start of track on the disk placed by the format routine.