12 Feb
2009
12 Feb
'09
7:59 a.m.
On Wednesday 11 February 2009 08:13:15 pm Fred Cisin wrote:
It's been a while, but my recollection is that they had two heads and each
had a pressure pad on the other side of the disk...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
> The
problem comes if you want 2 offset tracks say 180 drgrees out of
> phase (so one is at its innerpost point when the other is at the
> outermost point). Aligning the media to the offset hub accurately to do
> that would be 'interesting'.
On Wed, 11 Feb 2009, Roy J. Tellason wrote:
Didn't the Lisa have floppy drives with heads
on opposite sides of the
spindle? :-)
the "twiggy" drive. Apparently, not all 5.25" diskettes had thumbprints
on the media, so they added an extra access slot where your thumb would go
600 Oerstedt media, 96TPI???
There are 8 possible ways to put a 5.25" diskette into the drive, without
damaging it. Did the Lisa have two sets of heads, or was the extra access
slot there just to double the odds that the position in which it was
inserted would work?