From owner-freebsd-current Tue Mar 25 8:14: 9 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8E3AE37B401 for ; Tue, 25 Mar 2003 08:14:04 -0800 (PST) Received: from aeimail.aei.ca (aeimail.aei.ca [206.123.6.14]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8FEBA43F3F for ; Tue, 25 Mar 2003 08:14:03 -0800 (PST) (envelope-from anarcat@anarcat.ath.cx) Received: from shall.anarcat.ath.cx (xm8k4drqv8k7gkuj@dsl-133-253.aei.ca [66.36.133.253]) by aeimail.aei.ca (8.11.6/8.10.1) with ESMTP id h2PGCrt02144; Tue, 25 Mar 2003 11:12:53 -0500 (EST) Received: from lenny.anarcat.ath.cx (lenny.anarcat.ath.cx [192.168.0.4]) by shall.anarcat.ath.cx (Postfix) with SMTP id 9711E23E; Tue, 25 Mar 2003 11:12:51 -0500 (EST) Received: by lenny.anarcat.ath.cx (sSMTP sendmail emulation); Tue, 25 Mar 2003 11:12:53 -0500 Date: Tue, 25 Mar 2003 11:12:53 -0500 From: The Anarcat To: Soeren Schmidt Cc: Kevin Oberman , Don , Craig Reyenga , freebsd-current@FreeBSD.ORG Subject: Re: Broken DMA devices Message-ID: <20030325161253.GA600@lenny.anarcat.ath.cx> Mail-Followup-To: Soeren Schmidt , Kevin Oberman , Don , Craig Reyenga , freebsd-current@FreeBSD.ORG References: <20030324195958.GB681@lenny.anarcat.ath.cx> <200303250716.h2P7GSXe047117@spider.deepcore.dk> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="x+6KMIRAuhnl3hBn" Content-Disposition: inline In-Reply-To: <200303250716.h2P7GSXe047117@spider.deepcore.dk> User-Agent: Mutt/1.5.3i X-Spam-Status: No, hits=-35.4 required=5.0 tests=AWL,EMAIL_ATTRIBUTION,IN_REP_TO,PGP_SIGNATURE_2, QUOTED_EMAIL_TEXT,REFERENCES,REPLY_WITH_QUOTES, USER_AGENT_MUTT autolearn=ham version=2.50 X-Spam-Level: X-Spam-Checker-Version: SpamAssassin 2.50 (1.173-2003-02-20-exp) Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG --x+6KMIRAuhnl3hBn Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue Mar 25, 2003 at 08:16:28AM +0100, Soeren Schmidt wrote: > It seems The Anarcat wrote: > > > hw.ata.atapi_dma=3D"1" # Run the CD-ROM/DVD in DMA mode > > > to /boot/loader.conf. > > >=20 > > > This should be in almost EVERY /boot/loader.conf. The default is 0 (P= IO) > > > because DMA is broken on at least a few early CD readers, but it is > > > very rare to have it fail. (I've never seen it.) > >=20 > > Can't the ata drivers detect that condition or recognize the set of > > drives that are broken instead of penalizing everyone else? >=20 > ATAPI DMA is more likely to be broken than to be working, it is a=20 > function of both controller chip and device, in some situations even > a function of what master/slave device combo we have.. >=20 > There is a reason that almost all OS's out there has it disabled as defau= lt :) Thanks for those precisions... This could be a FAQ, pertaining also to how to enable it. So it's enabled system-wide? Can't it be done at the bus or device level? A. --=20 Advertisers, not governments, are the primary censors of media content=20 in the United States today. - C. Edwin Baker http://www.ad-mad.co.uk/quotes/freespeech.htm --x+6KMIRAuhnl3hBn Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+gIAFttcWHAnWiGcRAvK6AJ40K7T9S9ZM0W5Y7CfXoUq6fuXeBgCeIvuE V1dlThF/dRDMhMWFUjtgyi4= =qZZ3 -----END PGP SIGNATURE----- --x+6KMIRAuhnl3hBn-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message