Messages in this thread | | | From | Alistair John Strachan <> | Subject | Re: Does Linux support powering down SATA drives? | Date | Sat, 19 Nov 2005 20:21:40 +0000 |
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On Saturday 19 November 2005 20:25, Alan Cox wrote: > On Sad, 2005-11-19 at 19:00 +0000, Alistair John Strachan wrote: > > > SATA not yet, USB you could however. > > > > Or PATA, of course. I switch off two of my HDs 4 minutes after last use > > with the commands: > > > > hdparm -S 48 /dev/hde > > hdparm -S 48 /dev/hdg > > > > Isn't there a passthru patch in the works to let commands, such as the > > one required for suspend, through to a SATA device? > > 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.
Interesting.
> Same as the problem with many household devices in standby that actually > end up using as lot of power in their many "turned off" hours
My mistake, I was unaware of the difference between "Suspend" and (presumably) "Sleep". I've tried the latter without success on a Maxtor 120G here, does this work for anybody else (hdparm -Y)?
-- Cheers, Alistair.
'No sense being pessimistic, it probably wouldn't work anyway.' Third year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - 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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