Subject: Re: Does Linux support powering down SATA drives?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Alistair John Strachan <s0348365@sms.ed.ac.uk>
Cc: Marc Perkel <marc@perkel.com>, linux-kernel@vger.kernel.org
In-Reply-To: <200511192021.40922.s0348365@sms.ed.ac.uk>
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Date: Sat, 19 Nov 2005 21:49:07 +0000
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On Sad, 2005-11-19 at 20:21 +0000, Alistair John Strachan wrote:
> > 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)?

The power consumption situation is as true for suspend as sleep. Only
pulling the plug makes that difference. At the moment the SATA layer
doesn't support hot unplugging the drive which is what is really needed.

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