DRIVE_LAYOUT_INFORMATION_EX

The DRIVE_LAYOUT_INFORMATION_EX structure is used to report information about the driver layout.

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

Members

PartitionStyle

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

PartitionCount

Indicates the number of partitions detected on the disk.

Mbr

Indicates the drive layout information for a disk with a Master Boot Record. This member is valid when PartitionStyle is PARTITION_STYLE_MBR. See the definition of DRIVE_LAYOUT_INFORMATION_MBR for more information.

Gpt

Indicates the drive layout information for a disk with a GUID Partition Table. This member is valid when PartitionStyle is PARTITION_STYLE_GPT. See definition of DRIVE_LAYOUT_INFORMATION_GPT for more information.

PartitionEntry

Contains a variable-length array of PARTITION_INFORMATION_EX structures, one for each partition on the drive.

Headers

Declared in ntddk.h. Include ntddk.h.

Comments

This structure is used for both reading and writing disk partition information. It is used with IoReadPartitionTableEx and IoWritePartitionTableEx and replaces the obsolete structure DRIVE_LAYOUT_INFORMATION that was used with IoReadPartitionTable and IoWritePartitionTable. The principal difference is that the new structures and routines support both Master Boot Record (MBR) partitions and GUID Partition Table (GPT) partitions, whereas the older routines and structures are only used with MBR partitions.

See Also

IoReadPartitionTableEx, IoWritePartitionTableEx, DRIVE_LAYOUT_INFORMATION_MBR, DRIVE_LAYOUT_INFORMATION_GPT, PARTITION_STYLE