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    SubjectRe: [ugly patch] Save .15W-.5W by AHCI powersaving
    Pavel Machek wrote:
    > Hi!
    >
    > This is a patch (very ugly, assumes you have just one disk) to bring
    > powersaving to AHCI. You need Alan's SCSI autosuspend (attached) patch
    > as a base.
    >
    > It saves .5W compared to config with disk spinning, and even .15W
    > compared to hdparm -y... on my thinkpad x60 anyway.
    ..

    There was a discussion of this here today.
    It makes good use of AHCI-specific features.

    Has it been tested with a Port-Multiplier yet?

    This is cool enough that we really ought to do a hardware-independent
    version, so that all SATA interfaces could benefit. Especially ata_piix,
    but others too.

    Cheers


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