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From: Tejun Heo <tj@kernel.org>
To: Elias Oltmanns <eo@nebensachen.de>
Cc: Jeff Garzik <jeff@garzik.org>,
	linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2 v5] libata: Implement disk shock protection support
Date: Sun, 21 Sep 2008 05:58:14 -0400	[thread overview]
Message-ID: <48D61AB6.1070408@kernel.org> (raw)
In-Reply-To: <20080921094220.23240.9270.stgit@denkblock.local>

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). In fact, the whole port stops processing
> commands until the timeout has expired in order to avoid any resets due
> to failed commands on another device.
> 
> Signed-off-by: Elias Oltmanns <eo@nebensachen.de>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks.

-- 
tejun

  reply	other threads:[~2008-09-21 10:00 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-19 21:41 Disk shock protection in libata Elias Oltmanns
2008-09-19 21:46 ` [PATCH 1/2 v3] Introduce ata_id_has_unload() Elias Oltmanns
2008-09-29  4:34   ` Jeff Garzik
2008-09-19 21:48 ` [PATCH 2/2 v3] libata: Implement disk shock protection support Elias Oltmanns
2008-09-20  4:47   ` Tejun Heo
2008-09-20  5:54     ` Elias Oltmanns
2008-09-20 11:12       ` Elias Oltmanns
2008-09-20 21:44         ` [PATCH 2/2 v4] " Elias Oltmanns
2008-09-20 23:55           ` Tejun Heo
2008-09-21  9:54             ` [PATCH 2/2 v5] " Elias Oltmanns
2008-09-21  9:58               ` Tejun Heo [this message]
2008-09-21  9:51       ` [PATCH 2/2 v3] " Elias Oltmanns

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