From owner-freebsd-questions@FreeBSD.ORG Fri Dec 5 19:32:23 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 511BD1065675 for ; Fri, 5 Dec 2008 19:32:23 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: from smtp.knology.net (smtp.knology.net [24.214.63.101]) by mx1.freebsd.org (Postfix) with ESMTP id DD7588FC1A for ; Fri, 5 Dec 2008 19:32:22 +0000 (UTC) (envelope-from dkelly@Grumpy.DynDNS.org) Received: (qmail 31999 invoked by uid 0); 5 Dec 2008 19:32:21 -0000 Received: from unknown (HELO Grumpy.DynDNS.org) (75.76.211.79) by smtp3.knology.net with SMTP; 5 Dec 2008 19:32:21 -0000 Received: by Grumpy.DynDNS.org (Postfix, from userid 928) id D6A1E28422; Fri, 5 Dec 2008 13:32:20 -0600 (CST) Date: Fri, 5 Dec 2008 13:32:20 -0600 From: David Kelly To: Wojciech Puchar Message-ID: <20081205193220.GA36935@Grumpy.DynDNS.org> References: <20081205161112.f9bcddff.freebsd@edvax.de> <20081205164750.20fce934.freebsd@edvax.de> <20081205171703.B2281@wojtek.tensor.gdynia.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081205171703.B2281@wojtek.tensor.gdynia.pl> User-Agent: Mutt/1.4.2.3i Cc: Andrew Gould , Polytropon , FreeBSD Questions Subject: Re: DVD cloning tool X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: FreeBSD-Questions@FreeBSD.org List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 05 Dec 2008 19:32:23 -0000 On Fri, Dec 05, 2008 at 05:18:01PM +0100, Wojciech Puchar wrote: > > > >Thanks, dd is a good suggestion for ISO data. But what I need > > once again please do > man dd > > dd reads sector by sector. > > it won't work only for audio-sectors on CD , on DVD movies are stored > using "normal" 2K sectors Agree that dd is good for simple CDs and DVDs but can't say that I know it will behave on multi-session or multi-format discs. In years past there was an issue where some drives would return EOF with the last sector and others would wait until attempt to read past the last sector yet would return data. So with multiple generations of copy each generation got one block longer. Know this because 10 years ago working in a data warehouse I easily won the argument against using Windows to duplicate/distribute data on CD for lack of a disc verify utility. These days the Disk Utility in MacOS X automatically verifies. But back then under FreeBSD I used dd and handled EOF specially in my shell script. -- David Kelly N4HHE, dkelly@HiWAAY.net ======================================================================== Whom computers would destroy, they must first drive mad.