device not suitable for defragmentation, do you wish to continue
    (Y, [N])?

    Explanation: The user specified a device for a defragment
    operation that is currently unavailable or unsuitable for
    defragmentation. However, since the device may become available
    by the time the defragmentation operation begins, the user is
    allowed the option of continuing or aborting the command.

    User Action: If the device specified is correct, but is
    currently off line or, for some other reason, is unsuitable for
    defragmentation, enter Y in response to the prompt. Otherwise,
    enter N or press Return to abort the command.