From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-gh0-f174.google.com ([209.85.160.174]:60495 "EHLO mail-gh0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752855Ab2FEOiP (ORCPT ); Tue, 5 Jun 2012 10:38:15 -0400 Received: by ghrr11 with SMTP id r11so4337137ghr.19 for ; Tue, 05 Jun 2012 07:38:14 -0700 (PDT) Message-ID: <4FCE19D3.4090908@webstarts.com> Date: Tue, 05 Jun 2012 10:38:11 -0400 From: Jim MIME-Version: 1.0 To: linux-btrfs Subject: delete disk proceedure Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: Good morning btrfs list, I had written about 2 weeks ago about using extra btrfs space in an nfs file system setup. Nfs seems to export the files but the mounts don't work on older machines without btrfs kernels. So I am down to deleting several drives from btrfs to setup a standard raid 1 array for storage and export via nfs. My system stats are: [root@advanced ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sdm2 196G 50G 137G 27% / tmpfs 16G 0 16G 0% /dev/shm /dev/sdm1 2.0G 141M 1.8G 8% /boot /dev/sdm5 1.2T 20G 1.1T 2% /var 10.2.0.40:/data/sites 2.6T 2.4T 155G 94% /nfs1/data/sites 10.2.0.42:/data/sites 2.6T 2.2T 328G 87% /nfs2/data/sites /dev/sda 11T 4.9T 6.0T 46% /btrfs [root@advanced ~]# btrfs fi show failed to read /dev/sr0 Label: none uuid: c21f1221-a224-4ba4-92e5-cdea0fa6d0f9 Total devices 12 FS bytes used 4.76TB devid 6 size 930.99GB used 429.32GB path /dev/sdf devid 5 size 930.99GB used 429.32GB path /dev/sde devid 8 size 930.99GB used 429.32GB path /dev/sdh devid 9 size 930.99GB used 429.32GB path /dev/sdi devid 4 size 930.99GB used 429.32GB path /dev/sdd devid 3 size 930.99GB used 429.32GB path /dev/sdc devid 11 size 930.99GB used 429.08GB path /dev/sdk devid 2 size 930.99GB used 429.32GB path /dev/sdb devid 10 size 930.99GB used 429.32GB path /dev/sdj devid 12 size 930.99GB used 429.33GB path /dev/sdl devid 7 size 930.99GB used 429.32GB path /dev/sdg devid 1 size 930.99GB used 429.09GB path /dev/sda Btrfs v0.19-35-g1b444cd df -h and btrfs fi show seem to be in good size agreement. Btrfs was created as raid1 metadata and raid0 data. I would like to delete the last 4 drives leaving 7T of space to hold 4.9T of data. My plan would be to remove /dev/sdi, j, k, l one at a time. After all are deleted run "btrfs fi balance /btrfs". The data is not critical and can be lost but I am really trying to avoid the hassle of having to completely redo the filesystem. Does my deletion plan seem reasonable. Please, I'm really swimming alone here and would value some advice. Jim Maloney --