4.1 Create a VSC without Status Callback
Since the status callback interface is optional when creating a VSC, the requestor cannot provide a callback interface to the target. In this case, the requestor is only notified through the return value when the requested operation has been completed on the target.
The following figure shows the communication between the requestor and the target when creating a VSC without a requestor-provided callback interface.
Figure 3: Create a VSC without status callback