Acer Aspire One D250 disk spin-down problem

Matthias Apitz guru at
Sun Jan 16 15:27:31 UTC 2011

El día Sunday, January 16, 2011 a las 10:05:39AM +0000, Bruce Cran escribió:

> On Sun, 16 Jan 2011 08:24:13 +0100
> Matthias Apitz <guru at> wrote:
> >     Master:  ad4 <WDC WD2500BEVT-22ZCT0/11.01A11> SATA revision 2.x
> > As well the BIOS has no visible option for this. I want to disable
> > this, what could I do?
> Since it's a WDC disk I guess it's one of the "green" ones. These have
> a short default timeout after which they park the heads. I think you'd
> need to run the wdidle3.exe application to disable the internal timer,

Thanks, but wdidle3.exe is no option because the laptop does not know
any Win* partition anymore :-)

> but it may just be a default APM setting that can be changed from
> within FreeBSD using sysutils/ataidle and the -P switch.

but this does the trick:

# ataidle -P 128 /dev/ad4
APM set to 128

(and I have it set now via rc.conf);

Thanks for your help


Matthias Apitz
t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211
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