11 Jun
2010
11 Jun
'10
10:12 a.m.
On 6/10/2010 7:31 PM, Chuck Guzis wrote:
What I was trying to say, but in a rather roundabout
way. Given
that most common floppy data separators can accommodate at least a +/-
10% variation (or more) in long-term speed variation, a too-slow
drive can easily write a sector that's way out-of-spec timing-wise on
a track that's otherwise perfectly in spec. It's necessary that any
read algorithm be able to adjust to short-term (sector-to-sector)
variations, as well as long-term (track to track) ones.
Chuck,
Thanks for the response. I know you've advanced this position before.
My relatively simple "time between pulses" method works probably 95% of
the time. It's getting this last 5% to read correctly where it looks
like I'll need some more sophisticated algorithms.
Thanks
Keith