How can I manually turn off the HDD?

Steve Franks stevefranks at
Wed Feb 14 16:28:59 UTC 2007

I had heard the "automounter" could accomplish this as well when I was
researching the same topic, but never got around to trying it (had
major problems with a raid driver instead)

On 2/14/07, Daniel Rudy <dr2867 at> wrote:
> At about the time of 2/13/2007 10:58 AM, Chuck Swiger stated the following:
> > On Feb 13, 2007, at 7:47 AM, deeptech71 at wrote:
> >> How can I turn off the HDD? .. and leave the buffers in the memory,
> >> until the RAM is full .. then spin up the drive, write out the
> >> data, then it turn off again.
> >
> > ENOTSUPPORTED, at least with FreeBSD.  Note that Apple has done a lot
> > of work to facilitate drive spindown for power-saving reasons for
> > their laptops, so MacOS X will make a reasonable attempt to spindown
> > the drives until really needed....
> >
> There is a port called ataidle that you may want to look at.  It
> programs the HDD to spin down after a specified timeout.
> --
> Daniel Rudy
> _______________________________________________
> freebsd-questions at mailing list
> To unsubscribe, send any mail to "freebsd-questions-unsubscribe at"

Steve Franks, KE7BTE
Staff Engineer
La Palma Devices, LLC
(520) 312-0089

More information about the freebsd-questions mailing list