From owner-freebsd-questions@FreeBSD.ORG  Mon Sep  8 04:57:55 2003
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 24D2A16A4BF; Mon,  8 Sep 2003 04:57:55 -0700 (PDT)
Received: from mailout.informatik.tu-muenchen.de
	(mailout.informatik.tu-muenchen.de [131.159.0.5])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 3779F43FE5; Mon,  8 Sep 2003 04:57:54 -0700 (PDT)
	(envelope-from barner@in.tum.de)
Received: by zi025.glhnet.mhn.de (Postfix, from userid 1000)
	id B2FCE38E41; Mon,  8 Sep 2003 13:57:50 +0200 (CEST)
Date: Mon, 8 Sep 2003 13:57:50 +0200
From: Simon Barner <barner@in.tum.de>
To: Jonas <jonas@netwood.net>
Message-ID: <20030908115750.GA1419@zi025.glhnet.mhn.de>
References: <20030908033533.GB47926@freebsd1.cimlogic.com.au>
	<003301c375bc$6465a3f0$0800a8c0@master>
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1;
	protocol="application/pgp-signature"; boundary="h31gzZEtNLTqOjlF"
Content-Disposition: inline
In-Reply-To: <003301c375bc$6465a3f0$0800a8c0@master>
User-Agent: Mutt/1.5.4i
X-Virus-Scanned: by amavisd-new at informatik.tu-muenchen.de
cc: freebsd-questions@freebsd.org
cc: freebsd-hardware@freebsd.org
Subject: Re: RE: IBM 120 G IDE -- problems
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 08 Sep 2003 11:57:55 -0000


--h31gzZEtNLTqOjlF
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

[ top posting corrected ]

> > I have that problem with an ASUS P4S533 motherboard. I add=20
> > these sysctl
> > values to /boot/loader.conf:
> >=20
> > hw.ata.ata_dma=3D"0"
> > hw.ata.atapi_dma=3D"0"

> OH MAN...... You don't know how many hours you just saved me!!! It boots
> up beautifully with 3 drives.
>=20
> Thank you!!!!
>=20
> For future reference, do you know why this happens?

Because some chip set / drive combinations don't work in DMA mode (don't
know why).

You can list the modes your drives are currently using with the
following command (as root):

atacontrol mode 0 (1st channel)
atacontrol mode 1 (2nd   -"-  )

For performance reasons you can try whether disabling DMA mode for your
ATAPI devices is enough, i.e. your /boot/loader.conf should look like
this:

hw.ata.atapi_dma=3D"0"

Regards,
 Simon

--h31gzZEtNLTqOjlF
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
Content-Disposition: inline

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (FreeBSD)

iD8DBQE/XG6+Ckn+/eutqCoRAplCAJ9ggob9nk6WRXqG5m2HmZZEIc/e8ACg3POQ
hRzb4Jj8BnxjTNJFW/7TZxQ=
=EK2r
-----END PGP SIGNATURE-----

--h31gzZEtNLTqOjlF--