From owner-freebsd-questions@FreeBSD.ORG Sun Jul 15 20:23:37 2012 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 C38E9106564A for ; Sun, 15 Jul 2012 20:23:37 +0000 (UTC) (envelope-from jerry@seibercom.net) Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com [209.85.213.182]) by mx1.freebsd.org (Postfix) with ESMTP id 5EA688FC12 for ; Sun, 15 Jul 2012 20:23:37 +0000 (UTC) Received: by yenl8 with SMTP id l8so5237081yen.13 for ; Sun, 15 Jul 2012 13:23:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=seibercom.net; s=google; h=date:from:to:subject:message-id:in-reply-to:references:reply-to :organization:x-mailer:face:mime-version:content-type :content-transfer-encoding; bh=ILigbgUDKr7ikbfrZjGrFjSxgp8B4evFnvwGQBA6maQ=; b=e1u1EA8EGgkkMgWPYyKEvagRYv93+YozLBFPTGoDokf6h5RwGaMmfexc8bVVTIGXgW yFMkLTO3HvLba5SgBkXXxPjieQu6mfEwgMKmdMLaViWIAlzFRQTdAND6p7OOVEOZbe9/ 7KYMGt3FgOxfdjbEOAasIVEaS2zjJVXPefM50= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=date:from:to:subject:message-id:in-reply-to:references:reply-to :organization:x-mailer:face:mime-version:content-type :content-transfer-encoding:x-gm-message-state; bh=ILigbgUDKr7ikbfrZjGrFjSxgp8B4evFnvwGQBA6maQ=; b=MLjTHx0V8XDRCsHJvXQhXL0wLCC+q0P4j3+9hXudj/uIK6+AQY7K66Y8CEDCN6ERbA Z5p4jztjbFNZevXkme1AkKiB+tz2dGar5XCVDDIdV4MXAqr+GeMl+YeVQECePJlyY6eT b8Nd0dyg7gYdYpYBgnGBSBPKNxdDDZXRvTWZSyzByeRfH19G3/CqAgmvQkdHFfjGSA82 AF5LS44CNTIvQleRINjKcf5seG3QZ6ZMVBIkfM2WHOtKVq4MG2kgi5DR4J4OwP2oDf5b 1AYqM6+CDEe3c6BFnuaCcntbAwUjQMFwFq/9enzqwyhsqJdznjcfdrEHTC58wxvzxql9 daqw== Received: by 10.236.79.35 with SMTP id h23mr7600208yhe.60.1342383816796; Sun, 15 Jul 2012 13:23:36 -0700 (PDT) Received: from scorpio.seibercom.net (cpe-076-182-104-150.nc.res.rr.com. [76.182.104.150]) by mx.google.com with ESMTPS id l49sm25679359yhk.15.2012.07.15.13.23.35 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 15 Jul 2012 13:23:35 -0700 (PDT) Received: from scorpio (localhost [127.0.0.1]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: jerry@scorpio.seibercom.net) by scorpio.seibercom.net (Postfix) with ESMTPSA id 3WZzjK6cZpz2CG62 for ; Sun, 15 Jul 2012 16:23:33 -0400 (EDT) Date: Sun, 15 Jul 2012 16:23:33 -0400 From: Jerry To: FreeBSD Message-ID: <20120715162333.45b82082@scorpio> In-Reply-To: <20120715214823.679eb23d.freebsd@edvax.de> References: <64329.1342378317@tristatelogic.com> <20120715214823.679eb23d.freebsd@edvax.de> Organization: seibercom.net X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.6; amd64-portbld-freebsd8.3) Face: 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 Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Gm-Message-State: ALoCoQlfJjbDXtQmVdmix6D51ggp57rB76b5I1CW3M4IJUvzjy6PfDoaxZ7MoNpjxNcloZ2L4HXh Subject: Re: fsck on FAT32 filesystem? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: FreeBSD List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Jul 2012 20:23:37 -0000 On Sun, 15 Jul 2012 21:48:23 +0200 Polytropon articulated: > For example, make an 1:1 copy using dd (or ddrescue or dd_rescue) > of the disk. Work with a copy of that copy. Do not alter the disk. > Then use tools that do the job of recovery (see my list postings > about that topic, they contain a good list of tools you can use > on UNIX). The suggestion of SpinRite is also good, even though > the program is expensive. I'm confident it's worth its money. > But if you are willing to _learn_ (which means to read and to > experiment), the free recovery tools available through the > Ports Collection are really good. If I might interject here, making a copy is obviously imperative; however, it also exposes a severe problem. You are working under the assumption that the copy is actually correct.In fact, it is simply what is being read from the disk at the time of the copy. It may in fact be totally in error. SpinRite will attempt to read a damage sector up to 2000 times and through different algorithms determine what is most likely the correct data. Obviously it cannot do that if it is working with a copy of the drive. It must have access to the original drive. I have to admit that am partial to SpinRite since it saved my ass twice in the past 10 years when no other software could do the job 100%. Hence, if you cannot afford to lose your data, back it up. -- Jerry ♔ Disclaimer: off-list followups get on-list replies or get ignored. Please do not ignore the Reply-To header. __________________________________________________________________