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

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Date:	Tue, 07 Aug 2007 11:18:39 +0200
From:	Michael Sedkowski <sedmich@...il.com>
To:	Tejun Heo <htejun@...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

Dnia 07-08-2007, Wt o godzinie 15:56 +0900, Tejun Heo napisał(a):
> 192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age
> Always       -       388
> 
> I think this is the one.  You can test it by forcefully powering off
> the
> machine (press power button for several secs or disconnect AC and
> battery) and see whether the count increases.
> 
When I forcefully power off using the power button the raw value [last
one] rise by 1 point from 389 to 390. When I power off normally with
linux it remains constant.
Now could some one please explain to me what does that mean and am I in
danger of data loss?

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