From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762452AbYDSWvw (ORCPT ); Sat, 19 Apr 2008 18:51:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753503AbYDSWvn (ORCPT ); Sat, 19 Apr 2008 18:51:43 -0400 Received: from ns.netcenter.hu ([195.228.254.57]:50185 "EHLO netcenter.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753421AbYDSWvn (ORCPT ); Sat, 19 Apr 2008 18:51:43 -0400 X-Greylist: delayed 2158 seconds by postgrey-1.27 at vger.kernel.org; Sat, 19 Apr 2008 18:51:42 EDT Message-ID: <09eb01c8a26a$dbf5eee0$0404a8c0@dcccs> From: "Janos Haar" To: Subject: Sparse file question for data recovery Date: Sun, 20 Apr 2008 00:15:15 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1914 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1914 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello list, It is a way to use sparse files (or sg. else) to try to recover some big block device when it is readonly? I mean the original device is marked readonly, and only the changes are saved for the sparse file. This is useful if i want to only try to repair corrupted (or miss-assembled) raid arrays, image from damaged hdd, etc... Like only save the "undo" information independently from the repairing program. I only know that with nbd-server, but i wish to use a simple local solution. Somebody have an idea? :-) Thanks, Janos Haar