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Date:      Thu, 20 Dec 2001 18:26:45 -0500
From:      Bob K <melange@yip.org>
To:        Brady Montz <bradym@mail.hydrologue.com>
Cc:        Matthew Dillon <dillon@apollo.backplane.com>, Peter Jeremy <peter.jeremy@alcatel.com.au>, Chad David <davidc@acns.ab.ca>, Richard Nyberg <rnyberg@it.su.se>, David Wolfskill <david@catwhisker.org>, freebsd-stable@FreeBSD.ORG
Subject:   Re: 4.4-STABLE crashes - suspects new ata-driver over wd-drivers
Message-ID:  <20011220182644.S61341@yip.org>
In-Reply-To: <200112210425.fBL4Pnk09252@mail.hydrologue.com>; from bradym@mail.hydrologue.com on Thu, Dec 20, 2001 at 08:25:49PM -0800
References:  <20011218023630.A5190@ranger.acns.ab.ca> <200112181920.fBIJKRt70523@apollo.backplane.com> <200112190757.fBJ7veY02579@mail.hydrologue.com> <200112190732.fBJ7WFQ86868@apollo.backplane.com> <87u1ulq1a8.fsf@balestra.org> <200112202147.fBKLlGg78745@apollo.backplane.com> <20011221094727.F73243@gsmx07.alcatel.com.au> <200112210400.fBL40O009107@mail.hydrologue.com> <200112202259.fBKMxGi79320@apollo.backplane.com> <200112210425.fBL4Pnk09252@mail.hydrologue.com>

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On Thu, Dec 20, 2001 at 08:25:49PM -0800, Brady Montz wrote:
> 
> However, being a recent convert to BSD, I don't know how to turn of
> DMA. How do I?

Look at the output of sysctl hw.atamodes - it should look something like
this:

hw.atamodes: dma,---,dma,---,

This is on a system with masters on each controller and nothing as
slaves.  If you wanted to turn off DMA for the secondary master drive,
you would do:

sysctl -w hw.atamodes=dma,---,pio,---,

But this will vary depending on your actual setup.

-- 
Bob <melange@yip.org> | Please don't spill hot things on Bob.

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