Date: Sat, 30 Jul 2005 12:05:42 +0200 From: Fabian Keil <freebsd-listen@fabiankeil.de> To: garys@opusnet.com (Gary W. Swearingen) Cc: Brian Henning <brian.henning@gmail.com>, freebsd-questions@freebsd.org Subject: Re: burncd - verify burn Message-ID: <20050730120542.7f0008bb@localhost> In-Reply-To: <jek6je23d2.6je@mail.opusnet.com> References: <1f75ab0e05072510117c119a1d@mail.gmail.com> <jek6je23d2.6je@mail.opusnet.com>
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--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 <brian.henning@gmail.com> 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--
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