Date: Sat, 7 Dec 2002 07:25:16 -0800
From: David Ashley <dash@xdr.com>
Message-Id: <200212071525.gB7FPGn00204@dave.home>
To: linux-kernel@vger.kernel.org
Subject: RE: 2.4.18 beats 2.5.50 in hard drive access????
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 863
Lines: 20

Manish Lachwani (manish@Zambeel.com) wrote:
>Can you also make sure that write cache is ON? hdparm -q -W 1 /dev/hdX. And 
>also the READ cache. hdparm -q -A 1 /dev/hdX. 
>
>Also, from the IDENTIFY information below, it looks like no UDMA mode is set 
>for the device. It always is set to multiword dma 2.

I tried both hdparm commands on hdb/hdc/hdd and they didn't print out any
errors, but the performance hasn't changed any. I'm only concerned with
scattered read access performance, write performance is fairly irrelevant.

Is the lack of a UDMA mode related to the kernel message of "DMA disabled"?

Thanks--
Dave
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