Re: Formatting HD disks as 800K volumes

[schmidtd <schmidtd@my-deja.com>]

On Aug 27, 12:56 am, A2Pro <a...@wilserv.com> wrote:
>     I took the HD disk I formatted as an 800K volume using ADTPro
> 1.0.2 to a Mac to read it using the "IIe" emulator.  But when I
> inserted it into a 520c Powerbook, it was NOT recognized and I was
> given the option of either formatting it or ejecting it.  I ejected it
> and tried again with the same result. So I thought that you really
> can't use HD disks as 800K volumes.
>
>     But then I tried covering up the hole on the left side of the disk
> and reinserted it into the 520c.  Viola, it was recognized as a ProDOS
> volume.  A bit of a surprise...
Some drive mechanisms used the HD hole to sense (and to expect) HD
media and HD formatting.  A ProDOS filesystem wouldn't be expected on
HD media, so it decided it was unreadable... until you covered the
hole.  So it's a combination of drive mechanism and Mac OS that gave
you the result you saw.