From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:35119 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753759Ab3A3US6 (ORCPT ); Wed, 30 Jan 2013 15:18:58 -0500 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1U0e7i-0007gj-O9 for linux-btrfs@vger.kernel.org; Wed, 30 Jan 2013 21:19:10 +0100 Received: from 50-0-67-239.dsl.static.fusionbroadband.com ([50.0.67.239]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jan 2013 21:19:10 +0100 Received: from rogerb by 50-0-67-239.dsl.static.fusionbroadband.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jan 2013 21:19:10 +0100 To: linux-btrfs@vger.kernel.org From: Roger Binns Subject: Re: RAID 0 across SSD and HDD Date: Wed, 30 Jan 2013 12:18:41 -0800 Message-ID: References: <20130130100201.GN16285@carfax.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 In-Reply-To: Sender: linux-btrfs-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 30/01/13 11:10, Filipe Brandenburger wrote: > You could try something like "-l=linear" on md-raid or something > similar on LVM to build a 750GB volume That would also require wiping the filesystems and starting again(*). One of the joys of btrfs has been not dealing with LVM. On my workstation I have two 2GB disks, but on one there is a sizeable Windows partition. Getting LVM to stripe across the common sized space and then just use the rest took quite a while to work out, requires running several different commands and was something I had to write down. There was nothing intuitive. It was a happy day when I could wipe and replace with btrfs. Contrast with btrfs where 'btrfs --help' is almost always sufficient and adding/removing/resizing is trivial (and online). (*) I realise I could do things like add an external disk, btrfs add that and then btrfs delete the internals, redo the internal storage, btrfs add those back and then btrfs delete the external. It would take a long time, and is a reminder as to why I would prefer to be all btrfs everywhere rather than also dealing with LVM and similar. Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAlEJgCEACgkQmOOfHg372QSwEwCdG5GDUC2Ab/eVZo36t3Zs691R otAAn3p4Gq8lV2NgPp79799BflBwt/cW =yl2B -----END PGP SIGNATURE-----