mcguire at neurotica.com
Fri Jun 5 15:16:37 CDT 2009
On Jun 5, 2009, at 3:16 AM, Eric Smith wrote:
> They're double-sided disks. Not too uncommon. If you want to see
> some really strange 8" floppy disks, I have a box of Memorex disks
> that are hard-sectored and have the sector/index hole near the
> outer edge of the disk, rather than near the rim.
> IBM used an outer-edge index hole on the very first floppy drive,
> the Minnow (23FD), which was a read-only drive used for microcode
> storage. Minnow only stored about 80KB and spun at 90 RPM (vs. 360
> for "modern" 8-inch floppy drives). The 23FD drive and media were
> not offered as separate products.
I'm pretty sure I have a large number of these floppies.
Port Charlotte, FL
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