On Wed, Mar 18, 2015 at 2:42 PM, K Richard Pixley <rpix...@graphitesystems.com> wrote: > I'm having trouble deleting a subvolume. > > [root@new-alfred ~]# uname -a > Linux new-alfred.corp.graphitesystems.com 3.10.0-123.el7.x86_64 #1 SMP Mon
If highly recommend that you check out elrepo.org for a newer kernel than this. Currently they have kernel-ml-3.19.1-1.el7.elrepo.x86_64.rpm available. The Fedora 21 package for btrfs-progs-3.19 also works on RHEL 7/CentOS 7, which you can find in koji.fedoraproject.org, or build it from source if you prefer. > [root@new-alfred ~]# btrfs fi show > Label: 'rhel_bark' uuid: d3c6c783-c190-4675-99f2-b83f3c462656 > Total devices 2 FS bytes used 14.25GiB > devid 1 size 461.38GiB used 7.03GiB path /dev/sda2 > devid 2 size 465.76GiB used 12.01GiB path /dev/sdb1 > > Btrfs v3.16.2 > [root@new-alfred ~]# btrfs fi df / > Data, single: total=15.01GiB, used=13.19GiB > System, RAID1: total=8.00MiB, used=16.00KiB > System, single: total=4.00MiB, used=0.00 > Metadata, RAID1: total=2.00GiB, used=1.07GiB > Metadata, single: total=8.00MiB, used=0.00 > [root@new-alfred ~]# btrfs subvolume list / > ID 257 gen 1483 top level 5 path root > ID 258 gen 1466 top level 5 path home > [root@new-alfred ~]# btrfs subvolume delete home > Transaction commit: none (default) > ERROR: error accessing 'home' > [root@new-alfred ~]# btrfs subvolume delete /home > Transaction commit: none (default) > ERROR: error accessing '/home' > > What format do I need to use to delete the "home" subvolume? # mkdir /mnt/btr # mount /dev/sda2 /mnt/btr # btrfs subvolume delete /mnt/btr/home The Fedora/RHEL/CentOS installer creates two subvolumes: root and home. If you check out fstab, those subvolumes are mounted at / and /home. Therefore the top level subvolume (id 5) is not mounted by default, so there's no way to delete subvolumes in the top level. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
