DISK_PARTITION_INFO structure (ntdddisk.h)

The DISK_PARTITION_INFO structure is used to report information about the disk's partition table.

Syntax

typedef struct _DISK_PARTITION_INFO {
  ULONG           SizeOfPartitionInfo;
  PARTITION_STYLE PartitionStyle;
  union {
    struct {
      ULONG Signature;
      ULONG CheckSum;
    } Mbr;
    struct {
      GUID DiskId;
    } Gpt;
  } DUMMYUNIONNAME;
} DISK_PARTITION_INFO, *PDISK_PARTITION_INFO;

Members

SizeOfPartitionInfo

Size of this structure in bytes. Set to sizeof(DISK_PARTITION_INFO).

PartitionStyle

Takes a PARTITION_STYLE enumerated value that specifies the type of partition table the disk contains.

DUMMYUNIONNAME

DUMMYUNIONNAME.Mbr

If PartitionStyle == MBR

DUMMYUNIONNAME.Mbr.Signature

Specifies the signature value, which uniquely identifies the disk. The Mbr member of the union is used to specify the disk signature data for a disk formatted with a Master Boot Record (MBR) format partition table. Any other value indicates that the partition is not a boot partition. This member is valid when PartitionStyle is PARTITION_STYLE_MBR.

DUMMYUNIONNAME.Mbr.CheckSum

Specifies the checksum for the master boot record. The Mbr member of the union is used to specify the disk signature data for a disk formatted with a Master Boot Record (MBR) format partition table. This member is valid when PartitionStyle is PARTITION_STYLE_MBR.

DUMMYUNIONNAME.Gpt

If PartitionStyle == GPT

DUMMYUNIONNAME.Gpt.DiskId

Specifies the GUID that uniquely identifies the disk. The Gpt member of the union is used to specify the disk signature data for a disk that is formatted with a GUID Partition Table (GPT) format partition table. This member is valid when PartitionStyle is PARTITION_STYLE_GPT. The GUID data type is described on the Using GUIDs in Drivers reference page.

Requirements

Requirement	Value
Header	ntdddisk.h (include Ntdddisk.h)

See also

DISK_GEOMETRY_EX

PARTITION_STYLE