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DRIVE_LAYOUT_INFORMATION structure (winioctl.h)

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Contains information about the partitions of a drive.

Note

DRIVE_LAYOUT_INFORMATION is superseded DRIVE_LAYOUT_INFORMATION_EX structure.

Syntax

typedef struct _DRIVE_LAYOUT_INFORMATION {
  DWORD                 PartitionCount;
  DWORD                 Signature;
  PARTITION_INFORMATION PartitionEntry[1];
} DRIVE_LAYOUT_INFORMATION, *PDRIVE_LAYOUT_INFORMATION;

Members

PartitionCount

The number of partitions on a drive.

On disks with the MBR layout, this value is always a multiple of 4. Any partitions that are unused have a partition type of PARTITION_ENTRY_UNUSED (0).

Signature

The drive signature value.

PartitionEntry[1]

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

Requirements

Requirement Value
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header winioctl.h (include Windows.h)

See also

DRIVE_LAYOUT_INFORMATION_EX, IOCTL_DISK_GET_DRIVE_LAYOUT, IOCTL_DISK_SET_DRIVE_LAYOUT