PARTITION_INFORMATION_EX

PARTITION_INFORMATION_EX is the extended version of the PARTITION_INFORMATION structure. It holds information both for partitions with a Master Boot Record and for partitions with a GUID Partition Table.

typedef struct _PARTITION_INFORMATION_EX {
  PARTITION_STYLE  PartitionStyle;
  LARGE_INTEGER  StartingOffset;
  LARGE_INTEGER  PartitionLength;
  ULONG  PartitionNumber;
  BOOLEAN  RewritePartition;
  union {
    PARTITION_INFORMATION_MBR  Mbr;
    PARTITION_INFORMATION_GPT  Gpt;
  };
} PARTITION_INFORMATION_EX, *PPARTITION_INFORMATION_EX;

Members

PartitionStyle

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

StartingOffset

Specifies the offset in bytes on drive where the partition begins.

PartitionLength

Specifies the length in bytes of the partition.

PartitionNumber

Specifies the number of the partition.

RewritePartition

Indicates, when TRUE, that the partition information has changed. When FALSE, the information has not changed. This member has a value of TRUE when the partition has changed as a result of an IOCTL_DISK_SET_DRIVE_LAYOUT IOCTL. This informs the system that the partition information needs to be rewritten.

Mbr

Contains a structure of type PARTITION_INFORMATION_MBR containing information specific to a partition with a PartitionStyle member of PARTITION_STYLE_MBR.

Gpt

Contains a structure of type PARTITION_INFORMATION_GPT containing information specific to a partition with a PartitionStyle member of PARTITION_STYLE_GPT.

Headers

Declared in ntdddisk.h. Include ntdddisk.h.

Comments

This is the extended version of the partition information structure, PARTITION_INFORMATION. IoReadPartitionTableEx and IoWritePartitionTableEx operate on an array of PARTITON_INFORMATION_EX structures contained within the extended drive layout structure, DRIVE_LAYOUT_INFORMATION_EX. PARTITION_INFORMATION_EX replaces the structure PARTITION_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

PARTITION_INFORMATION_MBR, PARTITION_INFORMATION_GPT, IoReadPartitionTable, IoWritePartitionTable