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From: David Ashley <dash@xdr.com>
To: linux-kernel@vger.kernel.org
Subject: RE: 2.4.18 beats 2.5.50 in hard drive access????
Date: Sat, 7 Dec 2002 07:25:16 -0800	[thread overview]
Message-ID: <200212071525.gB7FPGn00204@dave.home> (raw)

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

             reply	other threads:[~2002-12-07 15:17 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-07 15:25 David Ashley [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-12-07 17:19 David Ashley
2002-12-07  5:51 David Ashley
2002-12-07  3:02 Manish Lachwani
2002-12-07  2:48 David Ashley
2002-12-07  2:36 David Ashley
2002-12-06 23:02 Manish Lachwani
2002-12-06 23:00 David Ashley
2002-12-07  2:10 ` Alan Cox
2002-12-07  4:29   ` Trever L. Adams
2002-12-08  1:55     ` Alan Cox
2002-12-08  3:28       ` Tomas Szepe
2002-12-08 17:27       ` Trever L. Adams
2002-12-06 19:29 David Ashley
2002-12-06 23:20 ` Alan Cox

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