From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bk0-f46.google.com ([209.85.214.46]:41178 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932307Ab3GQVY0 (ORCPT ); Wed, 17 Jul 2013 17:24:26 -0400 Received: by mail-bk0-f46.google.com with SMTP id na10so913734bkb.5 for ; Wed, 17 Jul 2013 14:24:25 -0700 (PDT) Received: from horus.localnet ([2001:4ca0:302:0:224:1dff:fed7:99b]) by mx.google.com with ESMTPSA id hn4sm2497247bkc.2.2013.07.17.14.24.23 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 17 Jul 2013 14:24:24 -0700 (PDT) From: Florian Lindner To: linux-btrfs@vger.kernel.org Subject: Questions about multi-device behavior Date: Wed, 17 Jul 2013 23:24:22 +0200 Message-ID: <1860433.azE0Vf7tMy@horus> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hello! I create a btrfs volume comprised of two partitions: # mkfs.btrfs -m dup -d single /dev/sdd1 /dev/sde1 metadata ist mirrored on each device, data chunks are scattered more or less randomly on one disk. a) If one disk fails, is there any chance of data recovery? b) If not, is there any advantage over a raid0 configuration. Thanks and regards, Florian