Start Tracing:
logman create trace "ETWTrace_n1" -ow -o c:\ETWTrace.etl -p {8E9AC05F-13FD-4507-85CD-B47ADC105FF6} 0xffffffffffffffff 0xff -nb 16 16 -bs 1024 -mode Circular -f bincirc -max 4096 –ets

Update Tracing:
logman update trace "ETWTrace_n1" -p {DEDADFF5-F99F-4600-B8C9-2D4D9B806B5B} 0xfffffffffffffff7 0xff -ets

Stop tracing:
logman stop "ETWTrace_n1" –ets