NTSTATUS
FstubDetectPartitionStyle(
  IN  PDISK_INFORMATION Disk,
  OUT PARTITION_STYLE* PartitionStyle
  );

Routine Description:

    Detect how a disk has been partitioned. For an MBR partitioned disk,
    sector zero contains the MBR signature. For an EFI partitioned disk,
    sector zero contains a legacy style MBR with a single partition that
    consumes the entire disk.

Arguments:

    Disk - The disk to determine the partition style for.

    PartitionStyle - A buffer to

Return Values:

    STATUS_SUCCESS - If the disk has been partitioned by a recognized
            partitioning scheme EFI or MBR.

    STATUS_UNSUCCESSFUL - If partitioning scheme was not recognized.