From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:57816 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752873AbbI0VpH (ORCPT ); Sun, 27 Sep 2015 17:45:07 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZgJkl-0004LG-07 for linux-btrfs@vger.kernel.org; Sun, 27 Sep 2015 23:45:03 +0200 Received: from 84.76.233.227 ([84.76.233.227]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 27 Sep 2015 23:45:02 +0200 Received: from iam by 84.76.233.227 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 27 Sep 2015 23:45:02 +0200 To: linux-btrfs@vger.kernel.org From: Juan Francisco Cantero Hurtado Subject: mkfs.btrfs(8) --data outdated? Date: Sun, 27 Sep 2015 22:33:01 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: kernel: 4.1.7 btrfs-progs: 4.2 mkfs.btrfs(8) man page says: -d|--data Specify how the data must be spanned across the devices specified. Valid values are raid0, raid1, raid5, raid6, raid10 or single. $ sudo mkfs.btrfs -d dup -m dup -M -O no-holes -f /dev/sdb1 SMALL VOLUME: forcing mixed metadata/data groups btrfs-progs v4.2 See http://btrfs.wiki.kernel.org for more information. Label: (null) UUID: 29de8c3e-92da-4fe1-aa31-830c1068f532 Node size: 4096 Sector size: 4096 Filesystem size: 3.00GiB Block group profiles: Data+Metadata: DUP 161.56MiB System: DUP 12.00MiB SSD detected: no Incompat features: mixed-bg, extref, skinny-metadata, no-holes Number of devices: 1 Devices: ID SIZE PATH 1 3.00GiB /dev/sdb1 The man page doesn't mention the option "-d dup". Am I missing something or the man page is outdated?. The partition will contain two copies of the data blocks?