From: Ming Lei Subject: Question of online defrag, thanks Date: Mon, 28 Oct 2013 17:13:15 +0000 Message-ID: <2CE44BD3DBCF9541909CCB42F11CA3921C78E294@sfo1exc-mbxp08.nbttech.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Cc: Peng Chen To: "linux-ext4@vger.kernel.org" Return-path: Received: from smtp.riverbed.com ([208.70.196.45]:13850 "EHLO smtp1.riverbed.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756704Ab3J1RWp convert rfc822-to-8bit (ORCPT ); Mon, 28 Oct 2013 13:22:45 -0400 Content-Language: en-US Sender: linux-ext4-owner@vger.kernel.org List-ID: Hi, I am using e4defrag to defrag running ext4 online. During running e4defrag, I am writing/reading data on file system. Is it safe to use e4defrag? I mean if power failure happens, is there any possibility of data loss or defragging file corruption? If there is possibility of defragging file corruption after power failure, can fsck fix it? Thank you very much. Peng