From owner-freebsd-questions@FreeBSD.ORG Wed Jan 7 09:06:02 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 CE79216A4CE for ; Wed, 7 Jan 2004 09:06:02 -0800 (PST) Received: from mailout.TechFak.Uni-Bielefeld.DE (mailout.TechFak.Uni-Bielefeld.DE [129.70.136.245]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6444943D41 for ; Wed, 7 Jan 2004 09:06:00 -0800 (PST) (envelope-from hhasenbe@techfak.uni-bielefeld.de) Received: from techfak.uni-bielefeld.de (antipasto.TechFak.Uni-Bielefeld.DE [129.70.131.113]) (8.11.7p1+Sun/8.11.6/TechFak/2003/04/16/pk) with ESMTP id i07H5lv22580; Wed, 7 Jan 2004 18:05:47 +0100 (MET) Message-ID: <3FFC3C6B.3020809@techfak.uni-bielefeld.de> Date: Wed, 07 Jan 2004 18:05:47 +0100 From: Hendrik Hasenbein User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.4) Gecko/20030709 X-Accept-Language: de, en, en-us MIME-Version: 1.0 To: Francisco Reyes References: <02b401c3d2d7$81439f40$8464a8c0@ovirt.dyndns.ws> <20040107081315.0786de1e.doublef@tele-kom.ru> <20040107093611.0a7983df.doublef@tele-kom.ru> <20040107094356.V24917@zoraida.natserv.net> In-Reply-To: <20040107094356.V24917@zoraida.natserv.net> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: Sergey 'DoubleF' Zaharchenko cc: freebsd-questions@freebsd.org cc: "W. Sierke" Subject: Re: How to create .iso file image of cdrom (atapi)? 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: Wed, 07 Jan 2004 17:06:02 -0000 Francisco Reyes wrote: > Other than speed is there any consideration about the buffer size? I assume you are referring to the 'bs=2048' argument to dd. The argument 'bs=2048' sets the block size to be used for the device. You can't use another value for cdrom drives than 2048 except you are able to change the blocksize on the drive. Some can be jumpered for 512 per block, but there is no need to do that. If you use another value for bs the operation will fail on a cdrom drive. Hendrik -- Ahhh there's only 10 types of people in the world, those who understand binary and those who don't...