Re: Does Linux support powering down SATA drives?
From: Pavel Machek
Date: Sun Nov 20 2005 - 19:39:21 EST
On Sat 19-11-05 20:25:07, 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.
Really? Harddrive does not contain AC/DC converters, so situation should be slightly
better there, no?
64 bytes from 126.96.36.199: icmp_seq=28 ttl=51 time=448769.1 ms
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