From: Pavel Machek <pavel@suse.cz>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Alistair John Strachan <s0348365@sms.ed.ac.uk>,
Marc Perkel <marc@perkel.com>,
linux-kernel@vger.kernel.org
Subject: Re: Does Linux support powering down SATA drives?
Date: Sun, 20 Nov 2005 23:55:51 +0000 [thread overview]
Message-ID: <20051120235550.GI2556@spitz.ucw.cz> (raw)
In-Reply-To: <1132431907.19692.15.camel@localhost.localdomain>
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?
Pavel
--
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next prev parent reply other threads:[~2005-11-21 0:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-19 17:41 Marc Perkel
2005-11-19 19:01 ` Alan Cox
2005-11-19 19:00 ` Alistair John Strachan
2005-11-19 19:14 ` Marc Perkel
2005-11-19 19:20 ` USB storage -> Oops (2.6.14.2) JaniD++
2005-11-19 19:43 ` Does Linux support powering down SATA drives? Jeff Woods
2005-11-19 20:25 ` Alan Cox
2005-11-19 20:21 ` Alistair John Strachan
2005-11-19 20:30 ` Ondrej Zary
2005-11-19 21:49 ` Alan Cox
2005-11-19 21:20 ` Marc Perkel
2005-11-19 23:04 ` Alistair John Strachan
2005-11-20 7:22 ` asmith
2005-11-20 15:53 ` Marc Perkel
2005-11-20 16:04 ` Tomasz Torcz
2005-11-20 16:07 ` Marc Perkel
2005-11-20 16:17 ` Tomasz Torcz
2005-11-20 16:08 ` Alistair John Strachan
2005-11-21 16:21 ` Rob Landley
2005-11-21 16:51 ` Jeff Garzik
2005-11-21 17:34 ` Rob Landley
2005-11-21 17:14 ` Jason L Tibbitts III
2005-11-20 1:59 ` Rogério Brito
2005-11-20 2:09 ` resyncing broken software raid 1 Marc Perkel
2005-11-20 2:23 ` Kyle Moffett
2005-11-21 7:25 ` Jens Axboe
2005-11-20 23:55 ` Pavel Machek [this message]
2005-11-21 8:48 ` Does Linux support powering down SATA drives? Stefan Seyfried
2005-11-20 1:54 ` Rogério Brito
2005-11-20 0:57 ` James Courtier-Dutton
2005-11-21 15:43 ` Mark Lord
2005-11-21 15:49 ` Marc Perkel
2005-11-20 12:20 Douglas Gilbert
2005-11-21 0:27 Nicolas Mailhot
[not found] <5aF0K-82E-5@gated-at.bofh.it>
[not found] ` <5aH2x-2ub-5@gated-at.bofh.it>
[not found] ` <5aIrE-4BY-11@gated-at.bofh.it>
[not found] ` <5aK0x-6Wi-27@gated-at.bofh.it>
[not found] ` <5aROj-119-5@gated-at.bofh.it>
2005-11-21 3:39 ` Robert Hancock
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