testing a schottky diode
If your DMM has a diode test function (diode symbol on the switch or display), try it both ways. 

With the red on the anode it should show the forward voltage at a relatively low current, so maybe 250 (mV) vs. 600 or so with a regular diode. In the opposite direction it should show overrange. 

Repeat the test for the other diode in the package. 

Of course it needs to be removed from the circuit for this to work reliably. 

A beep is not a good indication of semiconductor functionality- typically that means a short circuit, or at least a resistance that is fairly low.