PARTITION_INFORMATION structure (ntdddisk.h)
The PARTITION_INFORMATION structure contains partition information for a partition with a traditional AT-style Master Boot Record (MBR).
Syntax
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;
Members
StartingOffset
Specifies the offset in bytes on drive where the partition begins.
PartitionLength
Specifies the length in bytes of the partition.
HiddenSectors
Specifies the number of hidden sectors.
PartitionNumber
Specifies the number of the partition.
PartitionType
Possible 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 |
BootIndicator
Indicates, 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.
RecognizedPartition
Indicates, when TRUE, that the system recognized the type of the partition. When FALSE, the system did not recognize the type of the partition.
RewritePartition
Indicates, 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.
Remarks
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.
Requirements
| Requirement | Value |
|---|---|
| Header | ntdddisk.h (include Ntdddisk.h) |
See also
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