On Mon, 13 Nov 2006 10:32:24 -0500
Jeff Garzik <[email protected]> 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.
We already detect PATA over SATA so we can trivially address that (the
knobble check). Similarly we can turn ALPME on using a timer so it kicks
in after long idle periods only, or tie it to laptop mode.
For a laptop type environment with SATA not bridged PATA turning it on is
clearly the right thing to do.
Alan
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