linux-kernel - Re: [PATCH 3/4 v2] ide: Implement disk shock protection support

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Message-Id: <200809181624.54248.bzolnier@gmail.com>
Date:	Thu, 18 Sep 2008 16:24:53 -0700
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Elias Oltmanns <eo@...ensachen.de>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Tejun Heo <htejun@...il.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4 v2] ide: Implement disk shock protection support

On Wednesday 17 September 2008 09:38:37 Elias Oltmanns wrote:
> On user request (through sysfs), the IDLE IMMEDIATE command with UNLOAD
> FEATURE as specified in ATA-7 is issued to the device and processing of
> the request queue is stopped thereafter until the specified timeout
> expires or user space asks to resume normal operation. This is supposed
> to prevent the heads of a hard drive from accidentally crashing onto the
> platter when a heavy shock is anticipated (like a falling laptop expected
> to hit the floor). Port resets are deferred whenever a device on that
> port is in the parked state.
> 
> Signed-off-by: Elias Oltmanns <eo@...ensachen.de>

applied
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