Messages in this thread | | | Date | Mon, 25 Feb 2008 17:26:09 -0500 | From | Mark Lord <> | Subject | Re: [ugly patch] Save .15W-.5W by AHCI powersaving |
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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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