    # File lib/fog/vcloud/models/compute/server.rb, line 121
            def add_disk(size)
              if @disk_change == :deleted
                raise RuntimeError, "Can't add a disk w/o saving changes or reloading"
              else
                load_unless_loaded!
                @disk_change = :added

                @add_disk = {
                  'rasd:HostResource''rasd:HostResource' => {:vcloud_capacity => size},
                  'rasd:AddressOnParent''rasd:AddressOnParent' =>  (disk_mess.map { |dm| dm['rasd:AddressOnParent''rasd:AddressOnParent'] }.sort.last.to_i + 1).to_s,
                  'rasd:ResourceType''rasd:ResourceType' => '17'
                }
              end
              true
            end