NTSTATUS
FstubWritePartitionTableMBR(
  IN  PDISK_INFORMATION Disk,
  IN  PDRIVE_LAYOUT_INFORMATION_EX LayoutEx
  );

Routine Description:

    Write the MBR partition table represented by LayoutEx to
    the disk.

Arguments:

    Disk - The disk where the partition table should be written.

    LayoutEx - The new layout information.

Return Value:

    NTSTATUS code