This message generated a parse failure. Raw output follows here. Please use 'back' to navigate. From devnull@lkml.org Fri Apr 26 17:46:40 2024 Received: from spaans.ds9a.nl (adsl-xs4all.ds9a.nl [213.84.159.51]) by kylie.puddingonline.com (8.11.6/8.11.6) with SMTP id g8IE8LX01829 for ; Wed, 18 Sep 2002 16:08:21 +0200 Received: (qmail 19219 invoked from network); 18 Sep 2002 06:49:06 -0000 Received: from unknown (HELO spaans.ds9a.nl) (3ffe:8280:10:360:202:44ff:fe2a:a1dd) by mayo.ipv6.ds9a.nl with SMTP; 18 Sep 2002 06:49:06 -0000 Received: (qmail 27251 invoked by uid 1000); 17 Sep 2002 20:23:18 -0000 Received: (maildatabase); juh Received: (qmail 11441 invoked by alias); 17 Aug 2001 08:46:25 -0000 Received: (qmail 11436 invoked from network); 17 Aug 2001 08:46:22 -0000 Received: from digger.ds9a.nl (HELO fork.powerdns.com) (213.244.168.211) by spaans-smp.ds9a.tudelft.nl with SMTP; 17 Aug 2001 08:46:22 -0000 Received: (qmail 22628 invoked by uid 0); 17 Aug 2001 08:46:18 -0000 Received: from vvtp.tn.tudelft.nl (HELO vvtp.nl) (qmailr@130.161.252.29) by outpost.ds9a.nl with SMTP; 17 Aug 2001 08:46:18 -0000 Received: (qmail 11384 invoked by uid 2547); 17 Aug 2001 08:44:52 -0000 Received: (qmail 11247 invoked from network); 17 Aug 2001 08:44:50 -0000 Received: from vger.kernel.org (199.183.24.194) by vvtp.tn.tudelft.nl with SMTP; 17 Aug 2001 08:44:50 -0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 17 Aug 2001 04:43:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 17 Aug 2001 04:43:07 -0400 Received: from ns.suse.de ([213.95.15.193]:34572 "HELO Cantor.suse.de") by vger.kernel.org with SMTP id ; Fri, 17 Aug 2001 04:42:54 -0400 Received: from Hermes.suse.de (Hermes.suse.de [213.95.15.136]) by Cantor.suse.de (Postfix) with ESMTP id 33AE31E2DA; Fri, 17 Aug 2001 10:43:08 +0200 (MEST) To: linux-kernel@vger.kernel.org Cc: ehaase@inf.fu-berlin.de Subject: Re: ext2 not NULLing deleted files? References: <01081709381000.08800@haneman.suse.lists.linux.kernel> From: Andi Kleen Date: 17 Aug 2001 10:03:46 +0200 Message-Id: Lines: 32 User-Agent: Gnus/5.0803 (Gnus v5.8.3) Emacs/20.7 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org X-AntiVirus: scanned for viruses by AMaViS 0.2.1 (http://amavis.org/) X-AntiVirus: scanned for viruses by AMaViS 0.2.1 (http://amavis.org/) Enver Haase writes: > Hi there, > > I just recognized there's an "undelete" now for ext2 file systems [a KDE > app]. There have been ext2 undeletes for many years now (and howtos how to do it manually even longer), nothing new. > > "The Other OS" in its professional version does of course clear the deleted > blocks with 0's for security reasons; I would have bet a thousand bucks Linux > would do so, too [seems I should have read the source code, good thing no-one > wanted to take on the bet :) ]. > > So how to go about this? With that feature wanted, which fs should one choose > under Linux? Is there a patch for ext2 for that feature? Am I the only one > liking the idea? Old ext2 (before 2.0) supported this with a special attribute bit; but it was removed for good reasons. Just NULLing alone is quite useless anyways; just 0ed data can be easily recovered in a special laboratory by using old traces of magnetism on the surfaces. If you care about real data deletion you should probably use an utility like wipe which does about 20-30 passes with random data. That is far too complex to do in kernel space of course, but you can run it in user space as needed. 0ing would just give you a false sense of security. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/