DISK_PARTITION_INFO - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntdddisk.h

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;

View the official Windows Driver Kit DDI reference
// winioctl.h

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

View the official Win32 API reference

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Windows Driver Kit DDI reference (ns-ntdddisk-_disk_partition_info)

_DISK_PARTITION_INFO structure

Description

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

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.

See also

DISK_GEOMETRY_EX

PARTITION_STYLE

View the official Windows Driver Kit DDI reference

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Win32 API reference (ns-winioctl-disk_partition_info)

DISK_PARTITION_INFO structure

Description

Contains the disk partition information.

Members

SizeOfPartitionInfo

The size of this structure, in bytes.

PartitionStyle

The format of a partition.

For more information, see PARTITION_STYLE.

DUMMYUNIONNAME

DUMMYUNIONNAME.Mbr

If PartitionStyle is PARTITION_STYLE_MBR (0), the union is a structure that contains information for a master boot record partition, which includes a disk signature and a checksum.

DUMMYUNIONNAME.Mbr.Signature

MBR signature of the partition.

DUMMYUNIONNAME.Mbr.CheckSum

DUMMYUNIONNAME.Gpt

If PartitionStyle is PARTITION_STYLE_GPT (1), the union is a structure that contains information for a GUID partition table partition, which includes a disk identifier (GUID).

DUMMYUNIONNAME.Gpt.DiskId

GUID of the GPT partition.

See also

DISK_GEOMETRY_EX, PARTITION_STYLE

View the official Win32 API reference

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