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DateMon, 13 Nov 2006 10:48:53 -0500
FromJeff Garzik <>
SubjectRe: AHCI power saving (was Re: Ten hours on X60s)
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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