From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([69.77.167.62] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from <gentoo-user+bounces-87081-garchives=archives.gentoo.org@lists.gentoo.org>) id 1L6ItU-0004xT-Vu for garchives@archives.gentoo.org; Sat, 29 Nov 2008 06:01:29 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 8A8CAE0532; Sat, 29 Nov 2008 06:01:27 +0000 (UTC) Received: from ey-out-1920.google.com (ey-out-1920.google.com [74.125.78.149]) by pigeon.gentoo.org (Postfix) with ESMTP id 4B3E3E0532 for <gentoo-user@lists.gentoo.org>; Sat, 29 Nov 2008 06:01:27 +0000 (UTC) Received: by ey-out-1920.google.com with SMTP id 4so661083eyk.10 for <gentoo-user@lists.gentoo.org>; Fri, 28 Nov 2008 22:01:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender :to:subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references :x-google-sender-auth; bh=cPY4beqyOV8o5RVAlnAloofewlS733HKOThMbEAMrYc=; b=RtwZRIZkPKGFgggSyVf71vRgbRkA3Om1ucoPheoMfaIEgIGvEvMGIPIUe7ezTwIXSz 1iolhAT5bc44qyJhPYzxYg84o2oKDe1MdyRbf1J/YesNyjBnxUjM0VlduUJNcDHbWTez zy/NGQ6hgVvwxGhCs5X/ZXqiLpjBJsgvORagg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=Vc0UXYcKsBYkwOZcRrjN2dOYUzvunZcjBFvwALyvUMUArr74djqXK5AF4beXoPoVyJ qXgE05m9FquaG8r28K62VPcGxggNlNs3bJfzrwKEPt/PrON1s41BkVNUVBoc26fgEevp kQHUTEaqbE0xk6UdkxuUu5Lm97xnVl9ZfpX84= Received: by 10.210.29.11 with SMTP id c11mr2137345ebc.141.1227938486738; Fri, 28 Nov 2008 22:01:26 -0800 (PST) Received: by 10.210.34.20 with HTTP; Fri, 28 Nov 2008 22:01:26 -0800 (PST) Message-ID: <38af3d670811282201u6b802b57nbf41d187b6fb30f1@mail.gmail.com> Date: Sat, 29 Nov 2008 04:01:26 -0200 From: "Jorge Peixoto de Morais Neto" <please.no.spam.here@gmail.com> Sender: jorgepeixotomorais@gmail.com To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: [OT] filesystems In-Reply-To: <492D5CAF.3010504@f_philipp.fastmail.net> Precedence: bulk List-Post: <mailto:gentoo-user@lists.gentoo.org> List-Help: <mailto:gentoo-user+help@lists.gentoo.org> List-Unsubscribe: <mailto:gentoo-user+unsubscribe@lists.gentoo.org> List-Subscribe: <mailto:gentoo-user+subscribe@lists.gentoo.org> List-Id: Gentoo Linux mail <gentoo-user.gentoo.org> X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1227479490.26615.47.camel@rattus> <200811252007.55035.volker.armin.hemmann@tu-clausthal.de> <38af3d670811251124v7d447918v82b7ec11baafd1a9@mail.gmail.com> <200811252102.52130.volker.armin.hemmann@tu-clausthal.de> <38af3d670811251219n4c531baft7aa37951271b7f00@mail.gmail.com> <loom.20081125T210854-29@post.gmane.org> <492c6aef.uN1RRcHNp8dUe+Nc%Joerg.Schilling@fokus.fraunhofer.de> <38af3d670811251600m784f43c3i944a4ac56b001c49@mail.gmail.com> <492D5CAF.3010504@f_philipp.fastmail.net> X-Google-Sender-Auth: b890cadb258deb2b X-Archives-Salt: eb165cc9-3d0d-4aa9-a59f-d940ca3eab3b X-Archives-Hash: c9d09e754dfcf22a0e35fd8060de38bd On Wed, Nov 26, 2008 at 12:26 PM, Florian Philipp <lists@f_philipp.fastmail.net> wrote: >> As for my photos, I can back all the collection to a single DVD (and >> to a second one, since I keep hearing that DVD-Rs are unreliable), and >> since I don't take new photos every week, this solution is fine. >> > > A second DVD-R won't solve the problem because optical disks degrade over > time and the second one will degrade just as fast as the first. What you > need to do is to check the disks periodically (once a year is a good time > frame). I know DVD-Rs degrade, but it is unlikely they would fail at the same time, so copying twice does significantly alleviate the problem (AFAIK) Once a year isn't overkill? Isn't once every two years fine? > I myself would add a textfile with md5sums for all files to the DVD so you > don't have to check them visually. Sure. I am doing that since some time now. Unfortunately I didn't do so for some old backups. But data DVD-Rs have a considerable amount of correction code, and if the copy from DVD to hard disk proceeds without a single error message, there is a quite good chance that the files are good, right? (If they were burnt correctly in the fist place, that is. The manual of my DVD-RW drive warns that the burned disk should be checked before being trusted as a backup, and even then it - as usual - disclaims all warranties).