From owner-freebsd-questions@FreeBSD.ORG Tue Jan 5 19:17:00 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 5A85F1065693 for ; Tue, 5 Jan 2010 19:17:00 +0000 (UTC) (envelope-from yuri.pankov@gmail.com) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.158]) by mx1.freebsd.org (Postfix) with ESMTP id D52B18FC08 for ; Tue, 5 Jan 2010 19:16:59 +0000 (UTC) Received: by fg-out-1718.google.com with SMTP id 16so1986511fgg.13 for ; Tue, 05 Jan 2010 11:16:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:received :x-authentication-warning:date:from:to:cc:subject:message-id :references:mime-version:content-type:content-disposition :in-reply-to:user-agent; bh=mbuxOfY/sYkf3UNxURFM/L/BwvEIW+fEvVyqHi42lm4=; b=eUeOX58e4Xv3Qeq7O3w9vU3deF6VzYo7fIUeZpvVijM4jsBbqskUjhIsWfDlt8xEFT pcY/6DkmRNNCOw8o7cuBTWE+8o568/dvOLam7zSA2SR+CS6gvGDUTzZ0EWk9GovENKVW lnDjrLcLTMx6L2C6fGeffObV6Z9HPPFuTkGBQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=x-authentication-warning:date:from:to:cc:subject:message-id :references:mime-version:content-type:content-disposition :in-reply-to:user-agent; b=U18iLMqEy3ExKwf0U/WSQdv1VJOYjgWaGHsIClUgFs0Qi+vbJKe+0WSfeuTyLr9PqM ixa08CMq+qYk5ZrIChzszRNlIJizmXWPXBjC1gCtUsS4rHqbiMLPLxjYblZn7xPJNdEU x2C75rhEEsFZ1SrR5BNS861q/wEekU6NN4QOQ= Received: by 10.86.88.20 with SMTP id l20mr13893768fgb.14.1262719012091; Tue, 05 Jan 2010 11:16:52 -0800 (PST) Received: from darklight.org.ru ([213.132.76.16]) by mx.google.com with ESMTPS id 26sm29115006fks.50.2010.01.05.11.16.50 (version=TLSv1/SSLv3 cipher=RC4-MD5); Tue, 05 Jan 2010 11:16:51 -0800 (PST) Received: from darklight.org.ru (yuri@darklight.org.ru [127.0.0.1]) by darklight.org.ru (8.14.3/8.14.3) with ESMTP id o05JGkHA034230; Tue, 5 Jan 2010 22:16:46 +0300 (MSK) (envelope-from yuri.pankov@gmail.com) Received: (from yuri@localhost) by darklight.org.ru (8.14.3/8.14.3/Submit) id o05JGkfk034229; Tue, 5 Jan 2010 22:16:46 +0300 (MSK) (envelope-from yuri.pankov@gmail.com) X-Authentication-Warning: darklight.org.ru: yuri set sender to yuri.pankov@gmail.com using -f Date: Tue, 5 Jan 2010 22:16:45 +0300 From: Yuri Pankov To: Christoph Kukulies Message-ID: <20100105191645.GA1782@darklight.org.ru> References: <4B434D52.3030301@kukulies.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B434D52.3030301@kukulies.org> User-Agent: Mutt/1.5.20 (2009-06-14) Cc: freebsd-questions@freebsd.org Subject: Re: copying a disk with ignoring errors 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, 05 Jan 2010 19:17:00 -0000 On Tue, Jan 05, 2010 at 03:31:46PM +0100, Christoph Kukulies wrote: > I recall a case when I had a hard disk that had got bad sectors and > it wasn't accessible through normal mounting anymore. > Then a tool came into the game that - I believe - Poul Henning had > recommended or written for this purpose. > > It copies a disk sector by sector to a file (kind of dd), but > ignores errors, it just skips sectors it couldn't read (after a > couple > of retries). The result was, that one had a - albeit - worm-eaten - > image of the disk allowing to access the filesystem > and getting to the important files with a little luck these not > being amongst the corrupted data. > > Anyone knowing what this little tool was named? Something like > diskcopy, devcopy, I forgot. > > -- > Christoph dd conv=noerror? Yuri