From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Helmut Hullen" Subject: Re: cloning single-device btrfs file system onto multi-device one Date: 06 Apr 2011 08:30:00 +0200 Message-ID: References: Reply-To: helmut@hullen.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: List-ID: Hallo, Evert, Du meintest am 05.04.11: >> I then did a btrfs fi balance again and let it run through. However >> here is what I get: >> >> $ df -h /mnt >> Filesystem =A0 =A0 =A0 =A0 =A0 =A0Size =A0Used Avail Use% Mounted on >> /dev/sdb =A0 =A0 =A0 =A0 =A0 =A0 =A08.2T =A03.5T =A03.2T =A053% /mnt >> >> Only 3.2T left. How would I reclaim the missing space? >> >> $ sudo btrfs fi show >> Label: none =A0uuid: ... >> =A0 =A0 =A0 =A0Total devices 3 FS bytes used 3.43TB >> =A0 =A0 =A0 =A0devid =A0 =A04 size 2.73TB used 1.17TB path /dev/sdc >> =A0 =A0 =A0 =A0devid =A0 =A03 size 2.73TB used 1.17TB path /dev/sdb >> =A0 =A0 =A0 =A0devid =A0 =A02 size 2.70TB used 1.14TB path /dev/sda4 >> $ sudo btrfs fi df /mnt >> Data, RAID0: total=3D3.41TB, used=3D3.41TB >> System, RAID1: total=3D16.00MB, used=3D232.00KB >> Metadata, RAID1: total=3D35.25GB, used=3D20.55GB >> >> So that kind of worked but that is of little use to me as 2TB >> kind of disappeared under my feet in the process. > From my limited understanding, btrfs will write metadata in raid1 by > default. So, this could be where your 2TB has gone. > I am assuming you used raid0 for the three new disks? No - take a look at the (shown) output of "btrfs fi df /mnt". "DATA" is= RAID0. Viele Gruesse! Helmut -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html