The VTAM® MODIFY TRACE and NOTRACE start options and commands, with the value TYPE=QDIOSYNC, are used to activate and terminate QDIOSYNC trace. As with most other TRACE commands, you can save a QDIOSYNC command so that if the TRLE defining the OSA-Express2 or later devices to be synchronized is not active, the command is applied when the TRLE is activated. Unlike other TRACE and NOTRACE commands, the value ID=* is supported. When the value ID=* is specified with SAVE=NO, the ID=* value indicates that the QDIOSYNC command is to be applied to all currently active TRLEs that define OSA-Express2 or later adapters. When the value ID=* is specified with SAVE=YES, the ID=* value indicates that the QDIOSYNC command is to be applied to all currently active TRLEs that define OSA-Express2 or later adapters and to those that are activated by this VTAM in the future.

See MODIFY NOTRACE and MODIFY TRACE commands in z/OS Communications Server: SNA Operation and TRACE start option in z/OS Communications Server: SNA Resource Definition Reference for additional details about employing QDIOSYNC using TRACE.

You can use the VTAM DISPLAY TRACES, DISPLAY TRL, and DISPLAY ID commands to determine the current QDIOSYNC usage. See DISPLAY TRACES, DISPLAY TRL, and DISPLAY ID commands in z/OS Communications Server: SNA Operation for additional details.