From owner-freebsd-questions@FreeBSD.ORG Sat May 8 20:30:52 2004 Return-Path: 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 3739216A4CE for ; Sat, 8 May 2004 20:30:52 -0700 (PDT) Received: from out005.verizon.net (out005pub.verizon.net [206.46.170.143]) by mx1.FreeBSD.org (Postfix) with ESMTP id AA7B443D3F for ; Sat, 8 May 2004 20:30:51 -0700 (PDT) (envelope-from cswiger@mac.com) Received: from mac.com ([68.161.84.3]) by out005.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040509033051.KSIO2677.out005.verizon.net@mac.com>; Sat, 8 May 2004 22:30:51 -0500 Message-ID: <409DA5D9.5030909@mac.com> Date: Sat, 08 May 2004 23:30:33 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7b) Gecko/20040421 X-Accept-Language: en-us, en MIME-Version: 1.0 To: anubis References: <20040508171720.58100.qmail@web90010.mail.scd.yahoo.com> <200405090932.42291.anubis357@optusnet.com.au> In-Reply-To: <200405090932.42291.anubis357@optusnet.com.au> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Authentication-Info: Submitted using SMTP AUTH at out005.verizon.net from [68.161.84.3] at Sat, 8 May 2004 22:30:50 -0500 cc: freebsd-questions@freebsd.org cc: w sx Subject: Re: cdrw & PIO4 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 May 2004 03:30:52 -0000 anubis wrote: > On Sun, 9 May 2004 3:17 am, w sx wrote: [ ... ] > Have a look at man ata. Here is the important part > > ATAPI devices are set to PIO mode by default because severe DMA > problems are common even if the device capabilities indicate support. > You can always try to set DMA mode on an ATAPI device using > atacontrol(8), but be aware that your hardware might not support it > and can potentially hang the entire system causing data loss. While this advice was reasonable some years ago-- and to the extent that broken ATA hardware still exists may still be relevant now-- but please note that the Original Poster is trying to use a CD/RW burner. :-) It doesn't matter too much if you happen to read a CD slowly, but one ought to use DMA rather than PIO when burning CDs or DVDs. -- -Chuck