def METHOD_NAME(fs_util, client1, mounting_dir, timeout=300):
    global stop_flag
    stop_flag = False
    iter = 0
    if timeout:
        stop = datetime.now() + timedelta(seconds=timeout)
    else:
        stop = 0
    while not stop_flag:
        if stop and datetime.now() > stop:
            log.info("Timed out *************************")
            break
        client1.exec_command(sudo=True, cmd=f"mkdir -p {mounting_dir}/run_ios_{iter}")
        fs_util.run_ios(
            client1, f"{mounting_dir}/run_ios_{iter}", io_tools=["smallfile"]
        )
        iter = iter + 1