Running OMV 3.0.86. Decided to try UnionFS so I installed the plugin and installed 2 drives that I otherwise wasn't using. I formatted both drives with EXT4 but didn't mount them. When I open up the Union Filesystems menu there are no devices listed, I have a feeling I'm missing something simple but after messing with it for about 2 hours I thought I would try to get some help. Drives are WD, 320GB and 500GB.