linux-kernel - Re: [PATCH] Add quirk to set AHCI mode on ICH boards

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Date:	Sun, 11 Nov 2007 15:05:30 +0100
From:	Thorsten Leemhuis <thl@...heise.de>
To:	Matthias Schniedermeyer <ms@...d.de>
Cc:	Mark Lord <liml@....ca>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jeff Garzik <jeff@...zik.org>,
	Riki Oktarianto <rkoktarianto@...il.com>,
	linux-kernel@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH] Add quirk to set AHCI mode on ICH boards

On 10.11.2007 00:32, Matthias Schniedermeyer wrote:
>  [...]
> My computer/mainboard @work has such a "broken" BIOS. Of the 5 
> SATA-Ports this MB has only 1 (and 1 "missing" that is reported by
> linux but i can't find on the MB) is configured as AHCI [...]

There is nothing "broken" here. You have a ICH8 (without R) that drives
four SATA ports, which are handled by ata_piix.

Then you have a Jmicron JMB363 -- it handles the PATA-Channel and two
SATA-Ports -- one internal (near the battery)/next to the PCI-Slot and a
external eSATA port. Seems you configured it in AHCI-Mode in the
BIOS-Setup. Linux will work just fine if you connect the hard disc to
that port. But if you want to install Windows XP you need a driver from
Jmicron.

There were BIOSes for the P5B where you could enabled AHCI for the ICH8
as well. It seems Asus removed it in the later BIOS-versions again as
Intel doesn't provide a Windows-AHCI driver for the basic ICH8.

HTH and clarifies some of your problems.

Cu
knurd

-- 
Thorsten Leemhuis
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