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Date: Fri, 9 Nov 2001 20:57:07 -0200 (BRST)
From: Rik van Riel <riel@conectiva.com.br>
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To: Erik Andersen <andersen@codepoet.org>
Cc: Ben Israel <ben@genesis-one.com>, <linux-kernel@vger.kernel.org>
Subject: Re: Disk Performance
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Message-ID: <Pine.LNX.4.33L.0111092056160.2963-100000@imladris.surriel.com>
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On Fri, 9 Nov 2001, Erik Andersen wrote:
> On Fri Nov 09, 2001 at 08:31:32PM -0200, Rik van Riel wrote:
> > On Fri, 9 Nov 2001, Ben Israel wrote:
> >
> > > Why does my 40 Megabyte per second IDE drive, transfer files at best
> > > at 1-2 Megabytes per second?

> > # hdparm -d1 /dev/hda
> >
> > (not enabled by default because it corrupts data with some
> > old chipsets and/or disks)
>
> But wouldn't it make more sense to enable DMA by default, except
> for a set of blacklisted chipsets, rather then disabling it for
> everybody just because some older chipsets are crap?

The kernel does this, but only if CONFIG_IDEDMA_AUTO
is enabled ...

regards,

Rik
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