Can't create new volume on 3rd Gen Drobo

Greetings all. I have a 3rd gen Drobo 4-bay with 2 4TB and 2 2TB drives. I have 1 volume created besides the full drive (for Time Machine) and want to create another volume to use for Carbon Copy Cloner backups of my 2 main drives (about 5TBs of data). However Dashboard shows the 2 volumes (the Drobo main volume and DroboTM) with no option to create additional volumes. I’m on the latest version of Dashboard (2.6.7). What am I doing wrong?