From owner-freebsd-current Wed May 12 14:45:58 1999 Delivered-To: freebsd-current@freebsd.org Received: from phk.freebsd.dk (phk.freebsd.dk [212.242.40.153]) by hub.freebsd.org (Postfix) with ESMTP id 6FF2A14D25 for ; Wed, 12 May 1999 14:45:54 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.40.131]) by phk.freebsd.dk (8.9.1/8.8.8) with ESMTP id XAA27614; Wed, 12 May 1999 23:45:53 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.9.2/8.9.2) with ESMTP id XAA07257; Wed, 12 May 1999 23:45:50 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: "Jordan K. Hubbard" Cc: Soren Schmidt , des@yes.no (Dag-Erling Smorgrav), current@FreeBSD.ORG Subject: Re: DMA problems with IBM DeskStar drive In-reply-to: Your message of "Wed, 12 May 1999 14:27:53 PDT." <65947.926544473@zippy.cdrom.com> Date: Wed, 12 May 1999 23:45:50 +0200 Message-ID: <7255.926545550@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG In message <65947.926544473@zippy.cdrom.com>, "Jordan K. Hubbard" writes: >> Try disabling "ultra DMA" in the BIOS, that seems to have worked for >> me on my IBM-DJNA-371800 drive. >> >> (Jordan: We may want to put something in the README about this in 3.2!) > >I'd welcome suggestions as to what the text should look like; I'm >still unclear as to what exactly the problem us. :) So am I. I think the problem is that the wd.c based DMA stuff doesn't support ultra-DMA, and unless you tell your BIOS to no do ultra-DMA it will barf up a printf for each transfer to the device. How to write things like this in a README file has repeatedly been proven to be beyond my capabilities. -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message