From owner-svn-src-all@FreeBSD.ORG Fri Jan 30 16:32:27 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BEC1A10656C8; Fri, 30 Jan 2009 16:32:26 +0000 (UTC) (envelope-from keramida@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 97A6D8FC08; Fri, 30 Jan 2009 16:32:26 +0000 (UTC) (envelope-from keramida@FreeBSD.org) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id n0UGWQTN097101; Fri, 30 Jan 2009 16:32:26 GMT (envelope-from keramida@svn.freebsd.org) Received: (from keramida@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id n0UGWQHj097100; Fri, 30 Jan 2009 16:32:26 GMT (envelope-from keramida@svn.freebsd.org) Message-Id: <200901301632.n0UGWQHj097100@svn.freebsd.org> From: Giorgos Keramidas Date: Fri, 30 Jan 2009 16:32:26 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-6@freebsd.org X-SVN-Group: stable-6 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r187924 - stable/6/bin/dd X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Jan 2009 16:32:55 -0000 Author: keramida (doc committer) Date: Fri Jan 30 16:32:26 2009 New Revision: 187924 URL: http://svn.freebsd.org/changeset/base/187924 Log: MFC 187922,187609 from /head Add an example of using bs=2048 to duplicate data CD-ROMs. This should be a bit useful for users who look at the manpage and then try to copy data CD-ROM disks using dd. A lot of us know that bs=2048 is required, but it still manages to cause a bit of grief to those who haven't heard about it. PR: bin/130857 Submitted by: Tri Brotoharsono < mail at tribrotoharsono.net > Modified: stable/6/bin/dd/ (props changed) stable/6/bin/dd/dd.1 Modified: stable/6/bin/dd/dd.1 ============================================================================== --- stable/6/bin/dd/dd.1 Fri Jan 30 16:28:32 2009 (r187923) +++ stable/6/bin/dd/dd.1 Fri Jan 30 16:32:26 2009 (r187924) @@ -32,7 +32,7 @@ .\" @(#)dd.1 8.2 (Berkeley) 1/13/94 .\" $FreeBSD$ .\" -.Dd August 15, 2004 +.Dd January 23, 2009 .Dt DD 1 .Os .Sh NAME @@ -392,6 +392,11 @@ Remove parity bit from a file: Check for (even) parity errors on a file: .Pp .Dl "dd if=file conv=pareven | cmp -x - file" +.Pp +To create an image of a Mode-1 CD-ROM, which is a commonly used format +for data CD-ROM disks, use a block size of 2048 bytes: +.Pp +.Dl "dd if=/dev/acd0 of=filename.iso bs=2048" .Sh SEE ALSO .Xr cp 1 , .Xr mt 1 ,