linux-kernel - Re: [PATCH 3/5] libata: Implement disk shock protection support

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Message-ID: <48986E3A.5020707@tremplin-utc.net>
Date:	Tue, 05 Aug 2008 17:14:02 +0200
From:	Eric Piel <eric.piel@...mplin-utc.net>
To:	Theodore Tso <tytso@....edu>, Robert Hancock <hancockr@...w.ca>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Gabor Gombas <gombasg@...aki.hu>, Tejun Heo <htejun@...il.com>,
	Elias Oltmanns <eo@...ensachen.de>,
	Jeff Garzik <jeff@...zik.org>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Pavel Machek <pavel@....cz>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] libata: Implement disk shock protection support

Theodore Tso schreef:
> The real right answer though is to buy one of the laptop drives (such
> as the Seagate Momentus 7200.2 or 7200.3) which has the anti-shock
> detection built directly into the hard drive.  That way you don't have
> to have a daemon that sits in the OS waking up the CPU some 20 to 30
> times a second and burning up your battery even when the laptop is
> idle.
Well, it's not always _that_ bad. For instance, the accelerometer in the 
HP laptops (lis3lv02dl) can monitor free-falls by itself. When the 
laptop starts falling, it generates one interrupt.

Eric
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