# File lib/openstack/compute/connection.rb, line 487
    def attach_volume(server_id, volume_id, device_id)
      raise OpenStack::Exception::NotImplemented.new("os-volumes not implemented by #{@connection.http.keys.first}", 501, "NOT IMPLEMENTED") unless api_extensions["os-volumes""os-volumes"]
      data = JSON.generate(:volumeAttachment => {"volumeId" => volume_id, "device"=> device_id})
      @connection.req("POST", "/servers/#{server_id}/os-volume_attachments", {:data=>data})
      true
    end