From owner-freebsd-questions@FreeBSD.ORG Mon Oct 10 20:27:10 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 46D9D16A41F for ; Mon, 10 Oct 2005 20:27:10 +0000 (GMT) (envelope-from mrideout@windserve.com) Received: from www.windserve.com (225.36.98.65.windserve.net [65.98.36.225]) by mx1.FreeBSD.org (Postfix) with ESMTP id E991C43D49 for ; Mon, 10 Oct 2005 20:27:09 +0000 (GMT) (envelope-from mrideout@windserve.com) Received: from matt by www.windserve.com with local (Exim 4.43) id 1EP4Ef-0007Pl-MF for freebsd-questions@freebsd.org; Mon, 10 Oct 2005 16:27:01 -0400 Received: from 127.0.0.1 ([127.0.0.1]) (SquirrelMail authenticated user mrideout@windserve.com); by windserve.com with HTTP; Mon, 10 Oct 2005 16:27:01 -0400 (EDT) Message-ID: <37546.127.0.0.1.1128976021.squirrel@127.0.0.1> Date: Mon, 10 Oct 2005 16:27:01 -0400 (EDT) From: mrideout@windserve.com To: freebsd-questions@freebsd.org User-Agent: SquirrelMail/1.4.3a X-Mailer: SquirrelMail/1.4.3a MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - www.windserve.com X-AntiAbuse: Original Domain - freebsd.org X-AntiAbuse: Originator/Caller UID/GID - [32003 32004] / [47 12] X-AntiAbuse: Sender Address Domain - windserve.com X-Source: X-Source-Args: X-Source-Dir: Subject: Overburned DVD data recovery 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: Mon, 10 Oct 2005 20:27:10 -0000 Hi, I have a cron job that backs up a FreeBSD server's files to DVD+RW media each evening using growisofs from the dvd+rw-tools port. There are some files that I need to recover, but the problem is, the last 2 weeks of backups were a few hundred megabytes too large, and overburned. Is there any way to recover data from these overburned DVDs? I tried mounting them from FreeBSD, Windows and Mac systems without success. I also tried running "cat /dev/acd0 | gzip > data.iso.gz" in an attempt to grab the raw bits of the disk, but that only resulted in an input/output error. Restoring a 2-week-old backup is an option, but any ideas on how I might read data off of these overburned disks would be greatly appreciated. Thanks, Matt