linux-kernel - Re: sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040

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Message-Id: <1255021787.3386.24.camel@localhost>
Date:	Thu, 08 Oct 2009 18:09:47 +0100
From:	Tony Vroon <tony@...x.net>
To:	Bernie Innocenti <bernie@...ewiz.org>
Cc:	Mark Lord <liml@....ca>, Harri Olin <harri.olin@...il.com>,
	linux-ide@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	sysadmin <sysadmin@....org>
Subject: Re: sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040

On Thu, 2009-10-08 at 12:42 -0400, Bernie Innocenti wrote:
> El Tue, 06-10-2009 a las 23:13 -0400, Mark Lord escribió:
> I want to try reducing the frequency of the PCI-X bus, but the BIOS does
> not seem to provide a setting for it.  Is there another way?

Generally this is done with a physical jumper on the board instead.
You'll find it near to the bridge chip, which is almost always by NEC.
Another technique to slow the bridge down is to insert a regular PCI
card in the other slot (these bridges tend to offer 2 or 3 slots). As
the weakest link, it'll drag everything down to 33MHz.
An old PCI-X 66MHz-only card may prove helpful here as well. You don't
have to drive it in any way; getting power to it is sufficient.

Regards,
Tony V.

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