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Date:      Fri, 12 Mar 2010 21:56:39 +0200
From:      Alexander Motin <mav@FreeBSD.org>
To:        Pierre Beyssac <pb@freebsd.org>
Cc:        freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com>
Subject:   Re: (fixed) Re: 8-STABLE interrupt storm on atapci(?), Dell Inspiron 580
Message-ID:  <4B9A9C77.1030100@FreeBSD.org>
In-Reply-To: <20100312192759.GA91317@fasterix.frmug.org>
References:  <20100312121409.GA79294@fasterix.frmug.org> <20100312131832.GA54731@icarus.home.lan> <20100312165744.GA86971@fasterix.frmug.org> <20100312170936.GA59343@icarus.home.lan> <4B9A8F14.4030907@FreeBSD.org> <20100312192759.GA91317@fasterix.frmug.org>

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Pierre Beyssac wrote:
> On Fri, Mar 12, 2010 at 08:59:32PM +0200, Alexander Motin wrote:
>> Except ICH6 Intel uses separate IDs for AHCI and non-AHCI SATA
>> controller modes. So this flag is not completely correct. But probably
>> it shoudn't be just removed, as it is checked in other place. I know
>> about this and going to handle it later. It's not a problem now.
> 
> I was wondering exactly about that given the wording of the Intel
> document sent by Jeremy...
> 
>>> http://www.intel.com/Assets/PDF/specupdate/322170.pdf
>> Thanks.
>> PS: Check BIOS settings for enabling AHCI mode.
> 
> Problem is, I can't find any setting to do that, either it's not
> there or it's well hidden. The BIOS is up-to-date. Could it be
> possible for Dell to lock the chip in non-AHCI mode?

It is BIOS job to configure SATA controller mode. It is difficult to do
from driver level and very vendor-specific. Yes, it happens sometimes to
see BIOSes without AHCI support.

-- 
Alexander Motin



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