root@vmhost-0:~# nova-manage service list | grep volume
nova-volume      vmhost-0                             nova             disabled   :-)   2012-11-16 15:59:43
nova-volume      vmhost-2                             nova             enabled    :-)   2012-11-16 15:59:50
nova-volume      vmhost-5                             nova             disabled   :-)   2012-11-16 15:59:49
nova-volume      vmhost-4                             nova             disabled   :-)   2012-11-16 15:59:49
nova-volume      vmhost-6                             nova             disabled   :-)   2012-11-16 15:59:51