unsupported volume format

    Facility: EFI$CP, The OpenVMS EFI Partition Control Program

    Explanation: One or more of the volume structure checks has
    detected a volume format that is recognized, but that is not
    supported.

    User Action: Repair or reinitialize the target volume
    appropriately, or transfer the contents of the FAT volume to
    one of the recognized and supported FAT volume formats.