From owner-freebsd-questions@FreeBSD.ORG Sun Jul 1 14:39:12 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D1BEC16A41F for ; Sun, 1 Jul 2007 14:39:12 +0000 (UTC) (envelope-from freebsd@dfwlp.com) Received: from pollux.dfwlp.com (rrcs-64-183-212-244.sw.biz.rr.com [64.183.212.244]) by mx1.freebsd.org (Postfix) with ESMTP id 8791213C487 for ; Sun, 1 Jul 2007 14:39:12 +0000 (UTC) (envelope-from freebsd@dfwlp.com) Received: from athena.dfwlp.com (athena.dfwlp.com [192.168.125.83]) (authenticated bits=0) by pollux.dfwlp.com (8.13.8/8.13.8) with ESMTP id l61Ed9Me026748 for ; Sun, 1 Jul 2007 09:39:10 -0500 (CDT) (envelope-from freebsd@dfwlp.com) From: Jonathan Horne To: freebsd-questions@freebsd.org Date: Sun, 1 Jul 2007 09:39:09 -0500 User-Agent: KMail/1.9.6 References: <000301c7bb60$264eee30$0200a8c0@satellite> <20070701101326.GB63587@slackbox.xs4all.nl> <46878DCD.8060604@otenet.gr> In-Reply-To: <46878DCD.8060604@otenet.gr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-7" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200707010939.09739.freebsd@dfwlp.com> X-Spam-Status: No, score=-3.9 required=3.6 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.1 X-Spam-Checker-Version: SpamAssassin 3.2.1 (2007-05-02) on pollux.dfwlp.com Subject: Re: backing up dvds X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 01 Jul 2007 14:39:12 -0000 On Sunday 01 July 2007 06:19:41 Manolis Kiagias wrote: > Roland Smith wrote: > > On Sat, Jun 30, 2007 at 05:39:29PM -0500, Jonathan Horne wrote: > >> On Saturday 30 June 2007 16:46:36 Dave wrote: > >>> Hello, > >>> I've got a 6.2 box with a dvd writer in it. I want to back up some > >>> dvds to iso files so i can recreate the dvds at a later time should it > >>> be needed. I can use dvdbackup to backup in to a directory structure, > >>> but i'd rather not mount, create the directory, and iso, i'd rather > >>> make the iso directly from the dvd. Any pointers on this? > >>> Thanks. > >>> Dave. > >> > >> dd if=/dev/acd0 of=/path/to/filename.iso bs=1024 > > > > That should be bs=2048. > > > > AFAIK, data CDs and DVDs have 2k blocks: > > > > slackbox:~/tmp$ dd if=/dev/cd1 of=foo.dvd bs=1024 > > dd: /dev/cd1: Invalid argument > > 0+0 records in > > 0+0 records out > > 0 bytes transferred in 0.000146 secs (0 bytes/sec) > > > > slackbox:~/tmp$ dd if=/dev/cd1 of=foo.dvd bs=2048 > > ^C10270+0 records in > > 10270+0 records out > > 21032960 bytes transferred in 5.096854 secs (4126655 bytes/sec) > > > > Roland > > Roland is right, the blocksize is 2048 bytes. > In fact the following page is a very nice read: > > http://www.troubleshooters.com/linux/coasterless.htm > > The dd command would do a much more accurate image if you also specify > the length. The process is described in the page above. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" hehe, shame on me for trying to recall that memory, instead of actually looking it up (which is exactly what i do, each time to run an .iso file off... just to make sure im remembering correctly!) cheers, -- Jonathan Horne http://dfwlpiki.dfwlp.org freebsd@dfwlp.com