From mboxrd@z Thu Jan  1 00:00:00 1970
From: Elias Oltmanns <eo@nebensachen.de>
Subject: Re: Odd behaviour of device in response to idleimmediate with unload
Date: Mon, 10 Nov 2008 12:35:20 +0100
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In-Reply-To: <20081110102607.094281FD7C@chi.die-welt.net> (Evgeni Golov's
	message of "Mon, 10 Nov 2008 11:26:05 +0100")
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To: Evgeni Golov <sargentd@die-welt.net>
Cc: Tejun Heo <tj@kernel.org>, Mark Lord <liml@rtr.ca>, linux-ide@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>

Evgeni Golov <sargentd@die-welt.net> wrote:
> On Mon, 10 Nov 2008 18:00:18 +0900 Tejun Heo wrote:
>
>> Is the phy event before or after head unloading?
>
> How do I check this?

# dmesg
# echo 3000 > /sys/block/sda/device/unload_heads &
# dmesg

The first call to dmesg is only to make sure that it is in the cache so
the second won't be blocked by the park request.

Regards,

Elias