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Pavel Machek wrote: > On Sat 19-11-05 20:25:07, Alan Cox wrote: >> The latest kernels support command passthrough for SMART and the like >> but hdparm -S does not "switch off" anything. It may spin a drive down >> but the power consumption of 23 hours a day of "spun down" is >> significant, probably more than the hour it is powered up. > > Really? Harddrive does not contain AC/DC converters, so situation should be slightly > better there, no? it is 7.5W vs. 0.9W (idle vs standby or sleep) on a Barracuda 120GB 7200rpm desktop drive. Notebook drives are doing better: 0.65W vs 0.25W (idle vs standby) or 0.65W vs 0.1W (idle vs sleep) on some Hitachi Travelstar. Better than nothing, but pulling the plug is even better :-) -- Stefan Seyfried \ "I didn't want to write for pay. I QA / R&D Team Mobile Devices \ wanted to be paid for what I write." SUSE LINUX Products GmbH, Nürnberg \ -- Leonard Cohen - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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