From owner-freebsd-ppc@FreeBSD.ORG Sun Mar 22 20:41:20 2009 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 59BD3106564A for ; Sun, 22 Mar 2009 20:41:20 +0000 (UTC) (envelope-from xcllnt@mac.com) Received: from asmtpout016.mac.com (asmtpout016.mac.com [17.148.16.91]) by mx1.freebsd.org (Postfix) with ESMTP id 4758B8FC0C for ; Sun, 22 Mar 2009 20:41:20 +0000 (UTC) (envelope-from xcllnt@mac.com) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Received: from [192.168.4.253] (mail.xcllnt.net [75.101.29.67]) by asmtp016.mac.com (Sun Java(tm) System Messaging Server 6.3-8.01 (built Dec 16 2008; 32bit)) with ESMTPSA id <0KGX008N8DGT0470@asmtp016.mac.com> for freebsd-ppc@freebsd.org; Sun, 22 Mar 2009 13:41:20 -0700 (PDT) Message-id: <8B9483E9-D6D4-441E-9202-31FA34F5DA98@mac.com> From: Marcel Moolenaar To: Justin Hibbits In-reply-to: <20090322180638.GA3708@narn.knownspace> Date: Sun, 22 Mar 2009 13:41:18 -0700 References: <20090322180638.GA3708@narn.knownspace> X-Mailer: Apple Mail (2.930.3) Cc: freebsd-ppc@freebsd.org Subject: Re: Apple ATA DMA problems with ATAPI X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Mar 2009 20:41:20 -0000 On Mar 22, 2009, at 11:06 AM, Justin Hibbits wrote: > Well, it seems I was bitten by the ATA DMA problems from a few > months back. Try disabling DMA for atapi in /boot/loader.conf and enable it in /etc/sysctl.conf. For some reason, on my Mac Mini at least, it helps to first program PIO and then program *DMA. YMMV, -- Marcel Moolenaar xcllnt@mac.com