[ovirt-users] Cannot upgrade hosted-engine due to a LUN in a storage domain

I need to know if there are any cli commands to manage storage domains. I have a completely empty LUN in a storage domain but I can't use it to apply to my hosted-engine upgrade. I think I need to put the storage domain into maintenance mode and remove it but I don't have the GUI to do this. Anyone know how to use the command line for this?