Invalid volume format

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

    Explanation: One or more of the volume structure checks has
    failed. Failures normally indicate that the specified target
    disk is not a recognized or supported format, or the target disk
    volume is corrupted.

    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.