From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mondschein.lichtvoll.de ([194.150.191.11]:34979 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755736Ab2GBSAp convert rfc822-to-8bit (ORCPT ); Mon, 2 Jul 2012 14:00:45 -0400 From: Martin Steigerwald To: linux-btrfs@vger.kernel.org Subject: Re: Btrfs RAID space utilization and bitrot reconstruction Date: Mon, 2 Jul 2012 20:00:44 +0200 Cc: Waxhead References: <4FF0398F.3030802@online.no> (sfid-20120701_192140_431066_0D7C919C) In-Reply-To: <4FF0398F.3030802@online.no> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Message-Id: <201207022000.44415.Martin@lichtvoll.de> Sender: linux-btrfs-owner@vger.kernel.org List-ID: Am Sonntag, 1. Juli 2012 schrieb Waxhead: > As far as I understand btrfs stores all data in huge chunks that are > striped, mirrored or "raid5/6'ed" throughout all the disks added to > the filesystem/volume. Not through all disks. At least not with the current RAID-1 implementation. It stores two copies of a chunk, no matter how many drives you use. Rest see Hugo´s answer. -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7