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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