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

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Date:	Sun, 11 Nov 2007 19:24:35 +0100
From:	Matthias Schniedermeyer <ms@...d.de>
To:	Thorsten Leemhuis <thl@...heise.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 11.11.2007 15:05, Thorsten Leemhuis wrote:
> 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.

I don't have an P5B @work, but i guess MSI cooks with water too. :-)

But i have a (1 year old) P5B @home and it is exactly like you said.

My main point is still the same, if Linux could force AHCI mode, i 
wouldn't have to switch between those modes when booting Wintendo to 
play some games. (And i could use AHCI @work where i can't switch it in 
BIOS)


On a side note, with the mainboard i had before the P5B (ASUS, 925X 
Chipset, ICH 6 or 7) Linux worked in AHCI-mode and Wintendo worked also 
without problems. (IOW: I did not need to switch modes in BIOS!)






Bis denn

-- 
Real Programmers consider "what you see is what you get" to be just as 
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