duplicate concurrent defragmentation processes for device !AD

    Explanation: The defragmentation process detected a currently
    running defragmentation process on the target device. Concurrent
    defragmentation processes on the same target device are not
    allowed; thus, this process exits. This ensures that two
    defragmentation processes do not attempt to defragment the same
    disk at the same time.

    User Action: Ensure that no two defragmentation processes attempt
    to defragment the same device at the same time.