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Disk Partition Types

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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