2

I have an Arch Linux Installation on a btrfs filesystem partition "/dev/sda1":

[root@larch ~]# mount | grep sda
/dev/sda1 on / type btrfs (rw,relatime,ssd,space_cache,subvolid=266,subvol=/subvol_root)

As you can see, I do not mount the root volume but a subvolume called "subvol_root". When I mount the whole partition to /root/BTRFSROOT, you can see the current subvolumes:

[root@larch ~]# pwd
/root
[root@larch ~]# mount -o subvol=/ /dev/sda1 BTRFSROOT/
[root@larch ~]# btrfs sub list -apt BTRFSROOT/
ID  gen parent  top level   path    
--  --- ------  ---------   ----    
257 3239    5   5       subvol_root_borked
264 3350    5   5       snapshots
266 3358    5   5       subvol_root
267 3223    264 264     <FS_TREE>/snapshots/20190103-fresh-arch
268 302     264 264     <FS_TREE>/snapshots/20190104-pre-graphics
272 2275    264 264     <FS_TREE>/snapshots/20190106-pre-intel-driver
276 3250    264 264     <FS_TREE>/snapshots/20190107-pre-vbox
[root@larch ~]# 

I want to get rid of the subvol_root_borked, but I get the following error:

[root@larch ~]# btrfs sub delete BTRFSROOT/subvol_root_borked/
Delete subvolume (no-commit): '/root/BTRFSROOT/subvol_root_borked'
ERROR: Could not destroy subvolume/snapshot: Operation not permitted
[root@larch ~]# 

I created the subvol_root_borked by making a snapshot of subvol_root, but I have renamed it since the creation. I don't know the original snapshot name anymore. It may have also been initially created under the snapshots subvolume, but I'm not sure about that.

I was able to delete all of the contents within the subvolume, however:

[root@larch ~]# ls -lah BTRFSROOT/subvol_root_borked/
total 16K
drwxr-xr-x 1 root root  0 Jan  7 20:13 .
drwxr-xr-x 1 root root 94 Jan  4 00:24 ..

What is the problem with this subvolume / how can I further analyse this issue?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.