Message-ID: <3FB6685A.8010607@marcush.de>
Date: Sat, 15 Nov 2003 18:54:34 +0100
From: Marcus Hartig <marcus@marcush.de>
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To: "Prakash K. Cheemplavam" <prakashpublic@gmx.de>,
       linux-kernel@vger.kernel.org
Subject: Re: 2.6.0-test9 /-mm3 SATA siimage - bad disk performance
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Prakash K. Cheemplavam wrote:

> I have a similar problem: With 2.4.22-ac3 I had 37mb/sec with my Samsung 
> HD and 49MB/sec with IBM/Hitachi, now with 2.6 (all I tried, including 
> test9-mm2) I had only 20mb/sec for Samsung and about 39mb/sec for the 
> IBM. Motherboard is Abit NF7-S Rev2.0, as well, so same situation with 
> the siimage 1.06 driver. I wanted to run some dd tests as well, but it 
> is a real performance hit. Playing with readahead or other hdparm 
> options didn't help either.

I get a tip from Mark Hahn to set the pci latency to 64. And wow, with 
fedora 2.4.22 kernel I get then 41MB/sec with max_k_p_r 128. But,... 
after copying big files I get ext3-fs erros, cannot read inode etc and a
bus error. Bumm!

Maybe it runs better with your harddrives.

Marcus

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