From: Jeff Garzik <jeff@garzik.org>
To: Andi Kleen <ak@suse.de>
Cc: Pavel Machek <pavel@ucw.cz>, John Fremlin <not@just.any.name>,
kernel list <linux-kernel@vger.kernel.org>,
htejun@gmail.com, jim.kardach@intel.com
Subject: Re: AHCI power saving (was Re: Ten hours on X60s)
Date: Mon, 13 Nov 2006 10:48:53 -0500 [thread overview]
Message-ID: <455893E5.4010001@garzik.org> (raw)
In-Reply-To: <200611131637.56737.ak@suse.de>
Andi Kleen wrote:
>> Therein lies a key problem. Turning on all of AHCI's aggressive power
>> management features DOES save a lot of power. But at the same time, it
>> shortens the life of your hard drive, particularly hard drives that are
>> really PATA, but have a PATA<->SATA bridge glued on the drive to enable
>> connection to SATA controllers.
>
> 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.
Jeff
next prev parent reply other threads:[~2006-11-13 15:48 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87k639u55l.fsf-genuine-vii@john.fremlin.org>
[not found] ` <20061009215221.GC30702@elf.ucw.cz>
[not found] ` <87ods6loe8.fsf-genuine-vii@john.fremlin.org>
[not found] ` <20061025070920.GG5851@elf.ucw.cz>
[not found] ` <87y7r3xlif.fsf-genuine-vii@john.fremlin.org>
[not found] ` <20061026204655.GA1767@elf.ucw.cz>
[not found] ` <87slgv6ccz.fsf-genuine-vii@john.fremlin.org>
[not found] ` <20061112183614.GA5081@ucw.cz>
[not found] ` <87hcx3adcd.fsf-genuine-vii@john.fremlin.org>
2006-11-13 14:22 ` AHCI power saving (was Re: Ten hours on X60s) Pavel Machek
2006-11-13 15:32 ` Jeff Garzik
2006-11-13 15:37 ` Andi Kleen
2006-11-13 15:48 ` Jeff Garzik [this message]
2006-11-13 16:08 ` Valdis.Kletnieks
2006-11-13 17:58 ` Mark Lord
2006-11-13 22:01 ` Pavel Machek
2006-11-14 3:43 ` HD head unloads (was: Re: AHCI power saving) Henrique de Moraes Holschuh
2006-11-14 9:30 ` Jan Engelhardt
2006-11-14 18:06 ` HD head unloads Mark Lord
2006-11-15 10:58 ` Jan Engelhardt
2006-11-16 0:02 ` Jan Engelhardt
2006-11-21 4:40 ` AHCI power saving (was Re: Ten hours on X60s) Tejun Heo
2006-11-21 11:32 ` Pavel Machek
2006-11-13 16:11 ` Alan
2006-11-13 21:56 ` Pavel Machek
2006-11-14 13:33 ` AHCI power saving John Fremlin
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