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Date: Wed, 22 Jun 2005 17:12:45 +0100
From: Jim Mozley <jim.mozley@exponential-e.net>
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References: <Pine.BSI.4.33.0506221215410.23570-100000@hypselo.centroin.com.br>
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Subject: Re: support for ICH6R controller and Broadcom ethernet
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scuba@centroin.com.br wrote:
> Hi Jim,
> 
> 	I think it's not a answer to you but here is my recent experience.
> 	I've installed FBSD 5.4 in a box with Intel ICH5R chipset.
> 	It's working, no hangs, no panics, but the disk performance on the
> second IDE disk (I'm not using RAID, just simple master/slave setup), is
> terrible.
> 	It's like the DMA was not correctly set on the second disk.
> 	I read somewhere, that FreeBSD has full support to ICH5 chipset
> but NOT for ICH5"R".
> 	Even when running in "compatibility mode" set on BIOS, the
> performance is the same.
> 
> 	Someone told me the follwing on the performance list:
> 
> 	"I remember a commit to the ata driver to fix misprogramming of
> DMA timing on an Intel chipset for devices and/or channels other than the
> first.  I'm not sure if 5.4 has the bug or the fix."
> 
> 	To me it still has the bug.

OK thanks for that help.

If anyone knows anything more definitive I'd be grateful (no criticism 
of the helpful reply intended).

Thanks,

Jim