15 Nov
2007
15 Nov
'07
8:23 a.m.
On Wed, 2007-11-14 at 23:49 -0800, Chuck Guzis wrote:
Let's see--33,000 RPM is 550 rev/second or about
one rev every 1.8
milliseconds. To get that down to 60 microseconds max (2*30) you'd
have to pack 36 heads per track. That's a lot of heads on a 12"
disk!
Even assuming only a 3" band of the disk was available (radius being 6",
a bit around the edge and a bit for the spindle), that's still only 12
tracks per inch. No-one said the heads all had to be in a line, either.
You could mount four head bars with three heads apiece.
Gordon