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

From: Jeff Garzik
Date: Mon Nov 13 2006 - 10:49:46 EST


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



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