linux-kernel - Re: [linux-pm] Power management for SCSI

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Message-ID: <20080822105246.GB3482@elf.ucw.cz>
Date:	Fri, 22 Aug 2008 12:52:46 +0200
From:	Pavel Machek <pavel@...e.cz>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Oliver Neukum <oneukum@...e.de>,
	linux-pm@...ts.linux-foundation.org,
	James.Bottomley@...senpartnership.com,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	kernel list <linux-kernel@...r.kernel.org>, teheo@...ell.com
Subject: Re: [linux-pm] Power management for SCSI

Hi!

> > - suspending has side effects
> 
> I'm not sure what you mean by that.  Suspension always has side effects 
> of one kind or another.
> 
> > Suspension in USB has always side effects. That's not true for other
> > subsystems.
> 
> Name one.  At the very least, suspending a device means you can't use
> it again without first calling the driver's resume method.  That's a 
> side effect.

IDE, actually. I don't think it is relevant, but you can do hdparm -y,
and it will automatically spin up when you try to talk to it next
time.

								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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