def METHOD_NAME(wwn):
    cmd = "powershell -command \"get-disk|?"
    cmd += " {$_.UniqueId -eq '%s'}|select number|FL\"" % wwn
    status, output = session.cmd_status_output(cmd)
    if status != 0:
        test.fail("execute command fail: %s" % output)
    test.log.debug(output)
    output = "".join([s for s in output.splitlines(True) if s.strip()])
    info = output.split(":")
    if len(info) > 1:
        return info[1].strip()
    cmd = "powershell -command \"get-disk| FL\""
    output = session.cmd_output(cmd)
    test.log.debug(output)
    test.fail("Not find expected disk:" + wwn)