DRIVE_LAYOUT_INFORMATION_EX structure (winioctl.h)

Contains extended information about a drive's partitions.

Syntax

typedef struct _DRIVE_LAYOUT_INFORMATION_EX {
  DWORD                    PartitionStyle;
  DWORD                    PartitionCount;
  union {
    DRIVE_LAYOUT_INFORMATION_MBR Mbr;
    DRIVE_LAYOUT_INFORMATION_GPT Gpt;
  } DUMMYUNIONNAME;
  PARTITION_INFORMATION_EX PartitionEntry[1];
} DRIVE_LAYOUT_INFORMATION_EX, *PDRIVE_LAYOUT_INFORMATION_EX;

Members

PartitionStyle

The style of the partitions on the drive enumerated by the PARTITION_STYLE enumeration.

PartitionCount

The number of partitions on the drive. On hard disks with the MBR layout, this value will always be a multiple of 4. Any partitions that are actually unused will have a partition type of PARTITION_ENTRY_UNUSED (0) set in the PartitionType member of the PARTITION_INFORMATION_MBR structure of the Mbr member of the PARTITION_INFORMATION_EX structure of the PartitionEntry member of this structure.

DUMMYUNIONNAME

DUMMYUNIONNAME.Mbr

A DRIVE_LAYOUT_INFORMATION_MBR structure containing information about the master boot record type partitioning on the drive.

DUMMYUNIONNAME.Gpt

A DRIVE_LAYOUT_INFORMATION_GPT structure containing information about the GUID disk partition type partitioning on the drive.

PartitionEntry[1]

A variable-sized array of PARTITION_INFORMATION_EX structures, one structure for each partition on the drive.

Requirements

See also

DRIVE_LAYOUT_INFORMATION_GPT, DRIVE_LAYOUT_INFORMATION_MBR, IOCTL_DISK_GET_DRIVE_LAYOUT_EX, IOCTL_DISK_SET_DRIVE_LAYOUT_EX, PARTITION_INFORMATION_EX, PARTITION_INFORMATION