I'm having an issue just like the one in this post Kralizec - can't create shared folder, no volume?.]
I can't create a shared folder because omv web gui doesn't show any volumes. The volume it's supposed to show is a Btrfs Raid1 system. I have to say that Btrfs is able to do a Raid array by itself without mdadm, like this documentation shows: https://btrfs.wiki.kernel.org/…rfs_with_Multiple_Devices.
Since I can't create any shared folders, omv is been useless to me so far. Btrfs is working and mounting well but omv web gui doesn't seem to recognize it. My fstab entry looks like this:
and yes, that's a valid entry for Btrfs but I could not find any example of entries using UUIDs.
I also edited /etc/openmediavault/config.xml mntent entry with the fstab entrie above but it didn't work by itself. Any help would be apreciated.