Comment 7 for bug 1588791

First of all, you should unmanage a volume otherwise you'll get what you've got (in the cinder-volume log "Volume is already managed.") To do it just run: "$ cinder unmanage 2e48c311-0b2d-4788-b7bf-80016f45baa5". To look at volumes' names on storage you can use such commands: "sudo lvs" for LVM; "sudo rbd ls -l -p volumes" for Ceph. And then run: "$ cinder manage <host> <volume_name>", where <volume_name> is the name on STORAGE (that is, the output of the above commands).