I was just poking around in the ICH8 documentation and /dev/mem and I notice that all three of the SATA PHYs on my laptop are enabled, when I have only one SATA target device. AHCI allows the port to be disabled, and this saves a lot of power, but this functionality is not exposed in Linux. There are patches floating around on this mailing list to disable the port by echoing "power_off" to ALPM in sysfs, but this patch isn't merged in libata-dev and I don't see it in 2.6.27-rc7 either. Is there any hope of this getting merged? Is it dangerous or otherwise not advised? I think users would really appreciate having this. Disabling unused ports results in +10% extra battery life on my laptop. cf http://marc.info/?l=linux-ide&m=121504056904748&w=2 I think part 1 is severable from part 2, so perhaps the sysfs bits can be merged without the default policy part that seems objectionable. -jwb -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
