Disk Partition Types

The following table identifies the valid partition types that are used by disk drivers.

Constant/value	Description
PARTITION_ENTRY_UNUSED 0x00	An unused entry partition.
PARTITION_EXTENDED 0x05	An extended partition.
PARTITION_FAT_12 0x01	A FAT12 file system partition.
PARTITION_FAT_16 0x04	A FAT16 file system partition.
PARTITION_FAT32 0x0B	A FAT32 file system partition.
PARTITION_IFS 0x07	An IFS partition.
PARTITION_LDM 0x42	A logical disk manager (LDM) partition.
PARTITION_NTFT 0x80	An NTFT partition.
VALID_NTFT 0xC0	A valid NTFT partition. The high bit of a partition type code indicates that a partition is part of an NTFT mirror or striped array.

Remarks

There are several macros that can help you detect the partition type: IsContainerPartition, IsFTPartition, and IsRecognizedPartition. For more information, see WinIoCtl.h.

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

PARTITION_INFORMATION_EX

PARTITION_INFORMATION_MBR

SET_PARTITION_INFORMATION