From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.43) id 1E2G2h-0003Jz-6a for garchives@archives.gentoo.org; Mon, 08 Aug 2005 22:24:23 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.4/8.13.4) with SMTP id j78MN3dC028923; Mon, 8 Aug 2005 22:23:03 GMT Received: from rwcrmhc12.comcast.net (rwcrmhc13.comcast.net [216.148.227.118]) by robin.gentoo.org (8.13.4/8.13.4) with ESMTP id j78MJT1s020349 for ; Mon, 8 Aug 2005 22:19:29 GMT Received: from [192.168.0.123] (pcp04370732pcs.nrockv01.md.comcast.net[69.140.218.245]) by comcast.net (rwcrmhc13) with ESMTP id <200508082219510150071skue>; Mon, 8 Aug 2005 22:19:51 +0000 Message-ID: <42F7DA85.6040406@erols.com> Date: Mon, 08 Aug 2005 18:19:49 -0400 From: Matt Randolph User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050723) X-Accept-Language: en-us, en Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] setting "using_dma" on a BenQ DVD/RW drive References: <1123517023.20641.4.camel@sysconcept.ca> <1123520963.20643.9.camel@sysconcept.ca> <42F79BE8.9060109@dir.bg> <1123524978.20643.18.camel@sysconcept.ca> In-Reply-To: <1123524978.20643.18.camel@sysconcept.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Archives-Salt: b576733b-4e9f-4a66-8a73-a8a087e10005 X-Archives-Hash: 5b42f89e3a50d5de0c1d58417842d1ee Joseph wrote: >I have tried hdparm -d1 /dev/hdd >but it is not accepting the it. I can not set DMA on this DVD >I just called BenQ and they don't support Linux; so don't buy BenQ >products as they don't support Linux. In example of DVD/writer it will >become plain CD reader. >Without DMA access the writing to CD will be very slow. > > > I have a Plextor DVD burner in a (MS) Windows machine. No matter what I did, the drive would refuse DMA mode and would default to PIO mode. In Windows, the setting is "use DMA, if available," so I guess it's more of a suggestion than a setting. I had put the DVD burner on it's own IDE controller to try to maximize throughput when copying data from the hard disk. As it turns out, the DVD burner will only run in DMA mode when it is a slave to a disk that is already in DMA mode. By making the burner a slave to the hard disk, DMA flipped on and all was well. Maybe there is a Linux equivalent of that problem. -- "Pluralitas non est ponenda sine necessitate" - W. of O. -- gentoo-user@gentoo.org mailing list