PARTITION_INFORMATION - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ntdddisk.h
typedef struct _PARTITION_INFORMATION {
LARGE_INTEGER StartingOffset;
LARGE_INTEGER PartitionLength;
ULONG HiddenSectors;
ULONG PartitionNumber;
UCHAR PartitionType;
BOOLEAN BootIndicator;
BOOLEAN RecognizedPartition;
BOOLEAN RewritePartition;
} PARTITION_INFORMATION, *PPARTITION_INFORMATION;
View the official Windows Driver Kit DDI reference// winioctl.h
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;
View the official Win32 API referenceNo description available.
The PARTITION_INFORMATION structure contains partition information for a partition with a traditional AT-style Master Boot Record (MBR).
StartingOffsetSpecifies the offset in bytes on drive where the partition begins.
PartitionLengthSpecifies the length in bytes of the partition.
HiddenSectorsSpecifies the number of hidden sectors.
PartitionNumberSpecifies the number of the partition.
PartitionTypePossible values are as follows:
| Partition Type | Meaning |
|---|---|
| PARTITION_ENTRY_UNUSED | Unused entry |
| 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 MS-DOS V4 extended partition |
| PARTITION_HUGE | Specifies an MS-DOS V4 huge partition |
| PARTITION_IFS | Specifies an IFS partition |
| PARTITION_FAT32 | Specifies a FAT32 partition |
| PARTITION_FAT32_XINT13 | Windows 95/98: Specifies a partition that uses extended INT 13 services |
| PARTITION_XINT13_EXTENDED | Windows 95/98: Same as PARTITION_EXTENDED, but uses extended INT 13 services |
| PARTITION_PREP | Specifies a PowerPC Reference Platform partition |
| PARTITION_LDM | Specifies a logical disk manager partition |
| PARTITION_UNIX | Specifies a UNIX partition |
| PARTITION_NTFT | Specifies an NTFT partition. This value is used in combination (that is, bitwise logically ORed) with the other values in this table |
BootIndicatorIndicates, when TRUE, that this partition is a bootable (active) partition for this device. When FALSE, this partition is not bootable. This member is set according to the partition list entry boot indicator returned by IoReadPartitionTable.
RecognizedPartitionIndicates, when TRUE, that the system recognized the type of the partition. When FALSE, the system did not recognize the type of the partition.
RewritePartitionIndicates, when TRUE, that the partition information has changed. When FALSE, the partition 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.
The partition entry data in PARTITION_INFORMATION forms part of the drive layout information reported by the legacy routine IoReadPartitionTable in the DRIVE_LAYOUT_INFORMATION structure. DRIVE_LAYOUT_INFORMATION contains an array of PARTITION_INFORMATION structures pointed to by its PartitionEntry member. Each partition entry contains information for a partition on the drive. PARTITION_INFORMATION is also used with the legacy routine IoSetPartitionInformation to change the properties of the partition, such as its type, recorded on the disk.
Disk drivers should now use structures DRIVE_LAYOUT_INFORMATION_EX and PARTITION_INFORMATION_EX along with routines IoReadPartitionTableEx and IoSetPartitionInformationEx to read and alter partition information on the disk.
Contains information about a disk partition.
Note PARTITION_INFORMATION has been superseded by the PARTITION_INFORMATION_EX structure.
StartingOffsetThe starting offset of the partition.
PartitionLengthThe length of the partition, in bytes.
HiddenSectorsThe number of hidden sectors in the partition.
PartitionNumberThe number of the partition (1-based).
PartitionTypeThe type of partition. For a list of values, see Disk Partition Types.
BootIndicatorIf this member is TRUE, the partition is bootable.
RecognizedPartitionIf this member is TRUE, the partition is of a recognized type.
RewritePartitionIf this member is TRUE, 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.
If the partition is on a disk formatted as type master boot record (MBR), partition size totals are limited. For more information, see the Remarks section of IOCTL_DISK_SET_DRIVE_LAYOUT.