From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from meiko.romanrm.net ([195.154.92.155]:46433 "EHLO meiko.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756690AbbHZLu3 (ORCPT ); Wed, 26 Aug 2015 07:50:29 -0400 Date: Wed, 26 Aug 2015 16:50:24 +0500 From: Roman Mamedov To: George Duffield Cc: linux-btrfs@vger.kernel.org Subject: Re: Understanding BTRFS storage Message-ID: <20150826165024.05af044f@natsu> In-Reply-To: References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/H=KSd+EtaHwz_5ISj.BLvD3"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/H=KSd+EtaHwz_5ISj.BLvD3 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Wed, 26 Aug 2015 10:56:03 +0200 George Duffield wrote: > I'm looking to switch from a 5x3TB mdadm raid5 array to a Btrfs based > solution that will involve duplicating a data store on a second > machine for backup purposes (the machine is only powered up for > backups). What do you want to achieve by switching? As Btrfs RAID5/6 is not safe yet,= do you also plan to migrate to RAID10, losing in storage efficiency? Why not use Btrfs in single-device mode on top of your mdadm RAID5/6? Can e= ven migrate without moving any data if you currently use Ext4, as it can be converted to Btrfs in-place. --=20 With respect, Roman --Sig_/H=KSd+EtaHwz_5ISj.BLvD3 Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlXdqAAACgkQTLKSvz+PZwiY9wCcCMu57M/UB8aYETk0nwym7c7L F3AAmwaeXafytTtMMbFlb5C7RJkNIgeu =NIL2 -----END PGP SIGNATURE----- --Sig_/H=KSd+EtaHwz_5ISj.BLvD3--