Starting an FSS device

Successful completion of FSA level CONNECT processing causes JES to issue the START device order to the FSA. When the FSA receives the START device order, it performs device processing and then responds to JES. IBM recommends that all device initialization be done by the START FSA routine. Therefore, the START device routine is the signal for the FSA to begin issuing GETDS requests. Once the device is started, it can begin requesting data sets from JES for output processing.

The topics that follow explain how the FSA processes the START device order and responds to JES.