def mount(segment, puck, sample, unmount = False):
    """
    """
    cmd = "firstmount" if unmount else "mount"
    assertValidAddress(segment, puck, sample)

    hexiposi.move(segment)

    img_segment = get_img_cover_pos()
    if img_segment != segment:
        raise Excepton ("Image detection of cover does not match hexiposi: " + str(img_segment))

    if type(segment) == str:
        segment = ord(segment.upper()) - ord('A') +1
    robot.start_task(cmd,segment, puck, sample)
    #robot.mount(segment, puck, sample)