linux-kernel - Re: SMART problems in 2.6.22

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Message-ID: <Pine.LNX.4.63.0707091232480.7386@trinity.phys.uwm.edu>
Date:	Mon, 9 Jul 2007 12:35:04 -0500 (CDT)
From:	Bruce Allen <ballen@...vity.phys.uwm.edu>
To:	Jeff Garzik <jeff@...zik.org>
cc:	Mark Lord <liml@....ca>, David Greaves <david@...eaves.com>,
	Douglas Gilbert <dougg@...que.net>,
	Tejun Heo <htejun@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Kai Makisara <Kai.Makisara@...umbus.fi>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jan Dvorak <fermentol@...il.com>,
	Smartmontools Mailing List 
	<smartmontools-support@...ts.sourceforge.net>,
	Klaus Fuerstberger <kfuerstberger@...or.de>,
	Bruce Allen <bruce.allen@....mpg.de>
Subject: Re: SMART problems in 2.6.22

On Sun, 8 Jul 2007, Jeff Garzik wrote:

Jeff, thanks for the quick feedback.

> On the base point, libata has never enabled SMART on its own.  That's 
> always up to the BIOS, etc.

OK, clear.

> It's possible that the recent addition of ACPI support will cause disks 
> to be in different modes than previously expected.  ACPI supplies ATA 
> taskfiles to be pushed to the disk, and who knows what's in there...

Is there a simple way I can have affected users test this?  Is there a 
kernel boot flag or sysctl setting or something else they can use to 
disable the ACPI stuff so see if the problem then goes away?

Cheers,
 	Bruce
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