Message-ID: <44D789BA.4010206@t-online.de>
Date: Mon, 07 Aug 2006 20:43:06 +0200
From: Harald Dunkel <harald.dunkel@t-online.de>
User-Agent: Thunderbird 1.5.0.4 (X11/20060714)
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To: Tejun Heo <htejun@gmail.com>
CC: Pavel Machek <pavel@ucw.cz>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       davidsen@tmr.com
Subject: Re: 2.6.18-rc2, problem to wake up spinned down drive?
References: <44CC9F7E.8040807@t-online.de> <44CF7E5A.2010903@gmail.com> <20060805212346.GE5417@ucw.cz> <44D6AE59.6070709@gmail.com>
In-Reply-To: <44D6AE59.6070709@gmail.com>
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Tejun Heo wrote:
> Pavel Machek wrote:
>>> echo 1 > /sys/bus/scsi/devices/1:0:0:0/power/state
>>
>> Really? I thought power/state takes 0/3 (for D0 and D3)
>=20
> Yes, of course.  My mistake.  Sorry about the confusion.  The correct
> command is 'echo -n 3 > /sys/bus/scsi/devices/x:y:z:w/power/state'.
>=20

(Sure?  :-)

Now this did not work at all. The '-n 3' was probably
correct, but when I tried to access the disk, then it
did not spin up again (I waited for 5 minutes). There
was no message on the console, either.

But I could not reproduce this problem.

How do I monitor that the disk spins down and up?


Regards

Harri


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