Re: AHCI power saving (was Re: Ten hours on X60s)

Tejun Heo
2006-11-21T04:41:09Z

Mark Lord wrote:
> Jeff Garzik wrote:
>> Andi Kleen wrote:
>>
>>> How does it shorten its life?
>>
>> Parks your hard drive heads many thousands of times more often than it
>> does without the aggressive PM features.
>
> Spinning-down would definitely shorten the drive lifespan. Does it do
> that?
>
> Parking heads is more like just doing some extra (long) seeks.
> Is this documented somewhere as being a life-shortening action?

I wrote this in the other thread but writing here too for documentation
purpose.

* HL-DT-ST DVD-RAM GSA-H30N locks up completely on slumber. Physical
power removal and reapply is the only to recover it.

* Some WD raptors spin down (yeap, that's right, it spins down) on slumber.

Wonderful world of ATA. :-P

--
tejun