From: Alistair John Strachan <s0348365@sms.ed.ac.uk>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Does Linux support powering down SATA drives?
Date: Sat, 19 Nov 2005 19:00:12 +0000
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Cc: Marc Perkel <marc@perkel.com>, linux-kernel@vger.kernel.org
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On Saturday 19 November 2005 19:01, Alan Cox wrote:
> On Sad, 2005-11-19 at 09:41 -0800, Marc Perkel wrote:
> > Trying to save power consumption. I have a backup drive that is used
> > only once a day to back up the main drive. So - why should I run it more
> > that 10 minutes a day? What I'd like to do is keep it in an off state
> > and then at night power it on, mount it up, do the backup, unmount it,
> > and shut it down. Can I do that?
>
> 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?

-- 
Cheers,
Alistair.

'No sense being pessimistic, it probably wouldn't work anyway.'
Third year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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