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

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Message-ID: <46B883BB.10909@gmail.com>
Date:	Tue, 07 Aug 2007 23:37:47 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Robert Hancock <hancockr@...w.ca>
CC:	Michael Sedkowski <sedmich@...il.com>,
	"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, Thomas Renninger <trenn@...e.de>
Subject: Re: Disk spin down issue on shut down/suspend to disk

Robert Hancock wrote:
> Tejun Heo wrote:
>> Yeah, that seems to be what's going on.  I don't think we have any other
>> choice than blacklisting those notebooks.  This is a mess.  How does the
>> other OS cope with this?
> 
> Quite possible that it gets a double spindown with these laptop/drive
> combinations as well. I don't think it's particularly harmful as long as
> there's no emergency unload..

I heard that spinning a harddrive back up while the platter is still
spinning from the previous spindown can have pretty bad affect on the
harddisk.  This is from a Samsung HDD service guy and I'm not sure how
credible it is at all.

Thanks.

-- 
tejun
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