From owner-freebsd-questions@FreeBSD.ORG Sat Jul 30 10:06:04 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 6FFCC16A41F for ; Sat, 30 Jul 2005 10:06:04 +0000 (GMT) (envelope-from freebsd-listen@fabiankeil.de) Received: from smtprelay01.ispgateway.de (smtprelay01.ispgateway.de [80.67.18.13]) by mx1.FreeBSD.org (Postfix) with ESMTP id 04EFE43D4C for ; Sat, 30 Jul 2005 10:06:02 +0000 (GMT) (envelope-from freebsd-listen@fabiankeil.de) Received: (qmail 4414 invoked from network); 30 Jul 2005 10:05:21 -0000 Received: from unknown (HELO localhost) ([pbs]775067@[217.187.178.48]) (envelope-sender ) by smtprelay01.ispgateway.de (qmail-ldap-1.03) with SMTP for ; 30 Jul 2005 10:05:21 -0000 Date: Sat, 30 Jul 2005 12:05:42 +0200 From: Fabian Keil To: garys@opusnet.com (Gary W. Swearingen) Message-ID: <20050730120542.7f0008bb@localhost> In-Reply-To: References: <1f75ab0e05072510117c119a1d@mail.gmail.com> X-Mailer: Sylpheed-Claws 1.0.4 (GTK+ 1.2.10; i386-portbld-freebsd5.4) Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Signature_Sat__30_Jul_2005_12_05_42_+0200_H+ciiWPerBl_=4vh"; protocol="application/pgp-signature"; micalg=pgp-sha1 Cc: Brian Henning , freebsd-questions@freebsd.org Subject: Re: burncd - verify burn 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: Sat, 30 Jul 2005 10:06:04 -0000 --Signature_Sat__30_Jul_2005_12_05_42_+0200_H+ciiWPerBl_=4vh Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable garys@opusnet.com (Gary W. Swearingen) wrote: > Brian Henning writes: >=20 > > I would like to know a process to verify that I my cd burner has > > burned an ISO file correctly with burncd. I know I can take some > > precautions like checking the md5sum of the iso during a transfer from > > the Internet. I also read on the Internet that burncd does puts some > > extra padding at the end of the cd. I am not sure if that is true or > > not. Could someone tell me how to verify a cd burn? >=20 > Here's a crummy script I just used to burn and verify a CD, but I've > only tested it with the "cdrecord" setup. Older versions of it worked > with "burncd" on older OS versions, but I can tell you that the reason > I'm using "cdrecord" is that my manual efforts to do this with > "burncd" on 5.4-RELEASE (and maybe 5.4-STABLE a couple weeks ago) > failed, because I couldn't "dd" a CD burned with "burncd". (IE, I > couldn't sucessfully "dd" /dev/acd0, while I could "dd" /dev/cd0). >=20 > (Search this for "diff" to find the "verify". ISO images generally > get an extra two blocks of something on the CD "for run-out". See > "-isosize" description of "cdrecord" manpage.) Not generally, only if you burn in TAO mode. BTW you can use readcd -c2scan to check the burning quality at a deeper level and there even is a patch out there to make reading c1 error pointers possible. Haven't tested it though.=20 Fabian --=20 http://www.fabiankeil.de/ --Signature_Sat__30_Jul_2005_12_05_42_+0200_H+ciiWPerBl_=4vh Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFC61D2oomUOj0wp30RAjdCAKCKB7Bk+WM6igCX3+dLXCGBnhLp+ACfRYIj WdJHRsvidPLtZyS2fkMbY8o= =eny4 -----END PGP SIGNATURE----- --Signature_Sat__30_Jul_2005_12_05_42_+0200_H+ciiWPerBl_=4vh--