linux-kernel - Re: Disk spin down issue on shut down/suspend to disk

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Message-ID: <46B76BBC.9010107@gmail.com>
Date:	Tue, 07 Aug 2007 03:43:08 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Michael Sedkowski <sedmich@...il.com>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: Disk spin down issue on shut down/suspend to disk

Michael Sedkowski wrote:
>> Hmmm... If the problem only shows up on nx6325, it might be that ACPI is
>> pulling unnecessary stunt.  Please apply the attached patch and report
>> when the disk spins down and up.
> 
> Disk spins down on "Pre-shutdown prepare" and then goes up and down on
> "Power down".

Oh... crap, so acpi wants to sync cache on shutdown.  I wonder whether
it spins down the disk correctly.  Does emergency unload count increase
after each power down?  Also, please post the result of 'dmidecode'.

Thanks.

-- 
tejun
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