You can view QoSSIOC events from the NetApp Element Configuration extension point. A QoSSIOC event is reported when a VM that has a datastore with QoS enabled is reconfigured or issued a power or guest event.
QoSSIOC events are displayed from locally added clusters. In a Linked Mode environment, log into the vSphere Web Client that has the cluster added locally to view QoSSIOC events for that cluster.