From owner-freebsd-questions@FreeBSD.ORG Tue Oct 11 09:34:50 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 3E91A16A41F for ; Tue, 11 Oct 2005 09:34:50 +0000 (GMT) (envelope-from infofarmer@gmail.com) Received: from zproxy.gmail.com (zproxy.gmail.com [64.233.162.204]) by mx1.FreeBSD.org (Postfix) with ESMTP id 96F2143D4C for ; Tue, 11 Oct 2005 09:34:49 +0000 (GMT) (envelope-from infofarmer@gmail.com) Received: by zproxy.gmail.com with SMTP id z31so300273nzd for ; Tue, 11 Oct 2005 02:34:49 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=V2wtLAgBkPSOrFEeGBOg8s5KUXeE3groI1GspQQA1OIGxaKqr45u2LnwkeGqOJ9nDJjKcnYH92ywWi/cKP9EPi4/6x+/kNNAIDAsVO9Vh650P05eWaYHeAVrahhnjF1e6Yv70EW81ZDL9XwUOBvAvo5GR05F2QUnC5l4rdeLUDQ= Received: by 10.36.139.17 with SMTP id m17mr5568093nzd; Tue, 11 Oct 2005 02:34:49 -0700 (PDT) Received: by 10.37.20.34 with HTTP; Tue, 11 Oct 2005 02:34:49 -0700 (PDT) Message-ID: Date: Tue, 11 Oct 2005 13:34:49 +0400 From: "Andrew P." To: "mrideout@windserve.com" In-Reply-To: <37546.127.0.0.1.1128976021.squirrel@127.0.0.1> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <37546.127.0.0.1.1128976021.squirrel@127.0.0.1> Cc: freebsd-questions@freebsd.org Subject: Re: 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: Tue, 11 Oct 2005 09:34:50 -0000 On 10/11/05, mrideout@windserve.com wrote: > 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 > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.o= rg" > I'd start with trying to dd the DVD to an ordinary file (dd if=3D/dev/dvd-device of=3D/usr/recov.iso bs=3D2048) and then trying to mount that file.