On Sunday 23 Mar 2003 7:37 pm, Jack Coates wrote:
> On Sun, 2003-03-23 at 11:21, Anne Wilson wrote:
> > On Sunday 23 Mar 2003 7:14 pm, Jack Coates wrote:
> > > On Sun, 2003-03-23 at 11:02, Gonzalo Avaria wrote:
> > >
> > > Mar 23 11:01:19 felix sensord:   SYS Temp: 37.1 C (limit = 80.5 C,
> > > hysteresis =
> > > 69.8 C)
> > > Mar 23 11:01:19 felix sensord:   CPU Temp: 34.9 C (limit = 59.9 C,
> > > hysteresis =
> > > 55.1 C)
> >
> > This intrigued me.  Many years ago, when fdds and hdds were much less
> > reliable, I was recommended to test for hysteresis, which was defined to
> > me as even-ness of spin, lack of wobble, I guess.  I was told that the
> > most common cause of fdds failing to read previously written files was
> > that hysteresis had slipped.  Now  here we are, with the same word in a
> > very different context!
> >
> > Anne
>
> Sounds like a humorous use of the word in disk context :-) Looks like
> there is good grounding for it though:
> http://www.lassp.cornell.edu/sethna/hysteresis/WhatIsHysteresis.html
>
That's an interesting article.  I think the definition given to me was 'loose' 
to say the least.  There was a kit sold that had a special 5 1/4" disk and a 
special 3 1/2" disk which was used to measure 'hysteresis'.  Basically, if it 
said you were out of alignment it was as well to ditch the fdd asap.

> In the lm_sensors context, I think the intent is more closely linked to
> hysteria, as it is the threshold at which alarm warnings start.

LOL

Anne
-- 
Registered Linux User No.293302


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