5 Jun
2009
5 Jun
'09
7:23 p.m.
William Donzelli wrote:
I could use some extra 23FD media, and REALLY use a
drive that can write a 23FD.
I imagine that one could contrive to wire the head connector of a 23FD
to a write amplifier of one's own devising, and use a 23FD to write.
Not trivial, but perhaps not too terribly difficult. Since there's no
erase head, it would be necessary to bulk-erase the disk first.
Are the technical specs for 23FD in any surviving IBM maintenance
documents? It might be helpful to know the track 0 radius, track pitch,
media coercivity, etc.
Beyond the obvious difference in the location of the index/sector hole,
is here much other difference in the jacket of 23FD disks as compared to
the later (standard) 8" disks?
Back before I had any blank Twiggy disks for a Lisa, I took 5.25"
high-density ("1.2MB") disks and hacked up the jackets to make crude but
usable Twiggy disks. Could you make 23FD media that way?
Eric