From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1NAmxh-0007U6-NT for garchives@archives.gentoo.org; Wed, 18 Nov 2009 16:00:54 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id E7CFAE082F; Wed, 18 Nov 2009 16:00:19 +0000 (UTC) Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) by pigeon.gentoo.org (Postfix) with ESMTP id C395BE082F for ; Wed, 18 Nov 2009 16:00:19 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp.gentoo.org (Postfix) with ESMTP id 6D8FF67A15 for ; Wed, 18 Nov 2009 16:00:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at gentoo.org X-Spam-Score: -3.012 X-Spam-Level: X-Spam-Status: No, score=-3.012 required=5.5 tests=[AWL=-0.413, BAYES_00=-2.599] Received: from smtp.gentoo.org ([127.0.0.1]) by localhost (smtp.gentoo.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fIGqZJF9NTJ2 for ; Wed, 18 Nov 2009 16:00:09 +0000 (UTC) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.gentoo.org (Postfix) with ESMTP id 7EDA36791D for ; Wed, 18 Nov 2009 16:00:07 +0000 (UTC) Received: from list by lo.gmane.org with local (Exim 4.50) id 1NAmwu-0008JD-Ce for gentoo-user@gentoo.org; Wed, 18 Nov 2009 17:00:04 +0100 Received: from mn-69-34-67-62.sta.embarqhsd.net ([69.34.67.62]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Nov 2009 17:00:04 +0100 Received: from grant.b.edwards by mn-69-34-67-62.sta.embarqhsd.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 18 Nov 2009 17:00:04 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: gentoo-user@lists.gentoo.org From: Grant Edwards Subject: [gentoo-user] Re: Reading a DVD as an ISO image Date: Wed, 18 Nov 2009 15:56:13 +0000 (UTC) Message-ID: References: <20091117062411.GA16698@malaquias.DHCP-GERAL> <4B02CC0C.6000600@cox.net> <20091118104845.GD13353@malaquias.DHCP-GERAL> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: mn-69-34-67-62.sta.embarqhsd.net User-Agent: slrn/pre0.9.9-102 (Linux) Sender: news X-Archives-Salt: 96d8e7d0-93a6-48bc-a0d4-b11ae3bff42e X-Archives-Hash: eb646261497fe326212c3e2f2e3921f7 On 2009-11-18, Jos? Romildo Malaquias wrote: > On Tue, Nov 17, 2009 at 04:54:20PM +0000, Grant Edwards wrote: >> On 2009-11-17, Marcus Wanner wrote: >> >> > My guess is that he has a slow internet connection, he >> > downloaded a large iso, burned it, deleted it, and now wants >> > to get the iso back without downloading it again, but he has >> > access to the checksum/filesize of the original iso from the >> > place he downloaded it, and when he makes an iso, the >> > checksum/filesize does not match. >> >> In my experience that happens because one or the other of the >> images has "extra" garbage blocks past the end of the actual >> ISO filesystem image. If you look at the ISO filesystem header >> and find the actual size of the image, it's probably smaller >> than the "image file". If you only compare the bytes within >> the ISO image itself, I bet the two will match. > > In fact the size of the iso images obtained with dd and with cdread are > a little bit larger than the original one. Have you tried truncating them to the same length as the original one and then checking the hash? > The iso image obtained by mkisofs on the mounted disc (with > the udf filesystem type) are of the right size, but still not > identical to the original. -- Grant Edwards grante Yow! Go on, EMOTE! at I was RAISED on thought visi.com balloons!!