PARTITION_INFORMATION

The PARTITION_INFORMATION structure provides information about a disk partition.

typedef struct _PARTITION_INFORMATION {
  LARGE_INTEGER StartingOffset;
  LARGE_INTEGER PartitionLength;
  DWORD HiddenSectors;
  DWORD PartitionNumber;
  BYTE  PartitionType;
  BOOLEAN BootIndicator;
  BOOLEAN RecognizedPartition;
  BOOLEAN RewritePartition;
} PARTITION_INFORMATION, *PPARTITION_INFORMATION;

Members

StartingOffset

Specifies the starting offset of the partition.

PartitionLength

Specifies the length of the partition.

HiddenSectors

Specifies the number of hidden sectors in the partition.

PartitionNumber

Specifies the number of the partition (1-based).

PartitionType

Specifies the type of partition. This member can be one of the following values:

Value	Meaning
PARTITION_ENTRY_UNUSED	Entry unused.
PARTITION_FAT_12	Specifies a partition with 12-bit FAT entries.
PARTITION_XENIX_1	Specifies a Xenix type 1 partition.
PARTITION_XENIX_2	Specifies a Xenix type 2 partition.
PARTITION_FAT_16	Specifies a partition with 16-bit FAT entries.
PARTITION_EXTENDED	Specifies an extended partition entry.
PARTITION_HUGE	Specifies an MS-DOS V4 huge partition.
PARTITION_IFS	Specifies an IFS partition.
PARTITION_PREP	Specifies a PowerPC Reference Platform partition.
PARTITION_UNIX	Specifies a UNIX partition.
VALID_NTFT	Specifies an NTFT partition.
PARTITION_XINT13	Windows 95/98: Specifies a partition that uses extended int13 services.
PARTITION_XINT13_EXTENDED	Windows 95/98: Same as PARTITION_EXTENDED, but uses extended int13 services.

BootIndicator

Specifies whether the partition is bootable.

RecognizedPartition

Specifies whether the partition is recognized.

RewritePartition

Specifies whether the partition information has changed. When you change a partition (with IOCTL_DISK_SET_DRIVE_LAYOUT), the system uses this member to determine which partitions have changed and need their information rewritten.

Remarks

The DeviceIoControl function receives a PARTITION_INFORMATION structure in response to an IOCTL_DISK_GET_PARTITION_INFO or IOCTL_DISK_GET_DRIVE_LAYOUT control code. The DeviceIoControl function uses a PARTITION_INFORMATION structure as input to an IOCTL_DISK_SET_DRIVE_LAYOUT control code.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Unsupported.
  Header: Declared in Winioctl.h.

See Also

Device Input and Output Overview, Device Input and Output Structures, DeviceIoControl, IOCTL_DISK_GET_DRIVE_LAYOUT, IOCTL_DISK_GET_PARTITION_INFO, IOCTL_DISK_SET_DRIVE_LAYOUT