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

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Message-ID: <4558B232.8080600@rtr.ca>
Date:	Mon, 13 Nov 2006 12:58:10 -0500
From:	Mark Lord <lkml@....ca>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Andi Kleen <ak@...e.de>, Pavel Machek <pavel@....cz>,
	John Fremlin <not@...t.any.name>,
	kernel list <linux-kernel@...r.kernel.org>, htejun@...il.com,
	jim.kardach@...el.com
Subject: Re: AHCI power saving (was Re: Ten hours on X60s)

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?

Cheers
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