On Mon, Jun 1, 2015 at 6:36 AM, Neal Becker <ndbecker2@xxxxxxxxx> wrote: > I have everything under /: > > sudo btrfs subvolume list / > ID 257 gen 65795 top level 5 path root root is a subvolume, but is not the top level (default) subvolume. > > I want to move /home onto it's own subvolume. I hope I can do this while > the root device is mounted. Yes. You need to mount the top level and create a new subvolume. Assuming you haven't changed the default subvolume, just mount the device normally: mount /dev/sdaX /mnt btrfs sub create /mnt/home cp -a --reflink /mnt/root/home /mnt/ vi /etc/fstab ## to add an entry to mount subvol=home at /home umount /home mount /home And then at your leisure you can blow away the contents of the copied and no longer used /home directory still in the root subvolume. Just be certain you're deleting the correct home. You could: cd /mnt/root/home rm -rf * ## egads be certain This is not a mount point, but the old home directory which is no longer in use. The path to the in use one is /mnt/home as well as /home (in the above example). > > What is the procedure? > > I tried first to create a subvolume for /home at the top-level, but couldn't > figure out the syntax: > > [nbecker@nbecker2 ~]$ sudo btrfs subvolume create /home > [sudo] password for nbecker: > ERROR: '/home' exists That doesn't work because you're trying to create a home subvolume where a home directory exists. You need to mount the top level subvolume to create a subvolume in it. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
