Cluster count too small for FAT32
    Facility: EFI$CP, The OpenVMS EFI Partition Control Program
    Explanation: FAT32 has a capacity limit on the numbers of storage
    allocation units (clusters), and this limit has been reached.
    User Action: You must specify or utilize volumes with a larger
    cluster count, or switch to a FAT structure that permits the
    required number of clusters; the attempted volume structure is
    beyond the lower limits of FAT32.