From owner-freebsd-questions@FreeBSD.ORG Fri Oct 29 18:04:20 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 10065106566B for ; Fri, 29 Oct 2010 18:04:20 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout029.mac.com (asmtpout029.mac.com [17.148.16.104]) by mx1.freebsd.org (Postfix) with ESMTP id EB0AF8FC0C for ; Fri, 29 Oct 2010 18:04:19 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; charset=us-ascii Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp029.mac.com (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008; 64bit)) with ESMTPSA id <0LB200C6VCV4IU00@asmtp029.mac.com> for freebsd-questions@freebsd.org; Fri, 29 Oct 2010 11:04:16 -0700 (PDT) X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1004200000 definitions=main-1010290120 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2010-10-29_10:2010-10-29, 2010-10-29, 1970-01-01 signatures=0 From: Chuck Swiger In-reply-to: <4CCB0A4D.7050203@speakeasy.net> Date: Fri, 29 Oct 2010 11:04:15 -0700 Message-id: <3CA64AA4-0063-4207-8E72-4EB9396B5F50@mac.com> References: <4CCB0A4D.7050203@speakeasy.net> To: "Jason C. Wells" X-Mailer: Apple Mail (2.1081) Cc: freebsd general questions Subject: Re: Recovering a DVD 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: Fri, 29 Oct 2010 18:04:20 -0000 On Oct 29, 2010, at 10:54 AM, Jason C. Wells wrote: > I have a back up DVD that I cannot mount. dd won't read /dev/acd0 with an error "dd: /dev/acd0: Input/output error". Tried dvdisaster but it can't find my drive. Any pointers you can offer in getting this data off this disc are greatly appreciated. Try adding "bs=2048" or "bs=32768" to your dd line...? Also, what does "atacontrol list" say about your DVD drive? Regards, -- -Chuck