hard disk power down (was: Re: PowerTOP tool released; time to fix the wasted laptop power on fedora?)

[Richard Hughes]

On Mon, 2007-05-14 at 10:37 +0100, Jonathan Underwood wrote:
> 
> There's another factor here though, as I understand it hard drive
> lifetime is largely determined by the spin up/spin down frequency. So
> while it may save a bit of power spinning down more often, this might
> significantly shorten drive lifetimes. I'd definately want to have an
> option to disable that, if my understanding is correct.

Correct, hence why we only want to spin down the drive after a few
hours, rather than minutes or seconds.

Richard.