Partition type

---

title: "Partition type" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["disk-file-systems", "disk-partitions", "dos-technology", "ibm-pc-compatibles"] description: "Table inside a master boot record" topic_path: "technology/operating-systems" source: "https://en.wikipedia.org/wiki/Partition_type" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Table inside a master boot record ::

::callout[type=note] MBR partition types in IBM PC compatible systems ::

The partition type (or partition ID) in a partition's entry in the partition table inside a master boot record (MBR) is a byte value intended to specify the file system the partition contains or to flag special access methods used to access these partitions (e.g. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file systems, etc.).

Overview

Lists of assigned partition types to be used in the partition table in the MBR were originally maintained by IBM and Microsoft internally. When the market of PC operating systems and disk tools grew and liberated, other vendors had a need to assign special partition types to their products as well. As Microsoft neither documented all partition types already assigned by them nor wanted to maintain foreign assignments, third parties started to simply assign partition types on their own behalf in a mostly uncoordinated trial-and-error manner. This led to various conflicting assignments sometimes causing severe compatibility problems between certain products.

Several industry experts including Hale Landis, Ralf D. Brown, Matthias R. Paul, and Andries E. Brouwer in the 1990s started to research partition types and published (and later synchronized) partition type lists in order to help document the industry de facto standard and thereby reduce the risk of further conflicts. Some of them also actively helped to maintain software dealing with partitions to work with the updated lists, indicated conflicts, devised additional detection methods and work-arounds for vendors, or engaged in coordinating new non-conflictive partition type assignments as well.

It is up to an operating system's boot loader or kernel how to interpret the value. So the table specifies which operating systems or disk-related products introduced an ID and what file system or special partition type they mapped it to. Partitions with partition types unknown to the software should be treated as reserved but occupied disk storage space which should not be dealt with by the software, save for partition managers.

Local or Experimental Use

While the list is not officially maintained, new assignments should be coordinated.

In particular temporary partition type assignments for local or experimental projects can utilize type [7Fh](pid-7fh) in order to avoid conflicts with already assigned types. This type was specially reserved for individual use as part of the Alternative OS Development Partition Standard (AODPS) initiative since 2002.

List of partition IDs

This is a list of known master boot record partition types on IBM PC compatible computers:

::data[format=table]

Partition ID	Occurrence	Access	Bootable	Type	Origin	Supported by	Description
00h	MBR, EBR			Free	IBM	All	PID_00hEmpty partition entry
01h	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	File system	IBM	DOS 2.0+	PID_01hFAT12 as primary partition in first physical 32 MB of disk or as logical drive anywhere on disk (else use [06h](pid-06h) instead)
02h	MBR	CHS	x86, 68000, Z8000, PDP-11	File system	Microsoft, SCO	XENIX	PID_02hXENIX root (see [03h](pid-03h) and [FFh](pid-ffh))
03h	MBR	CHS		File system	Microsoft, SCO	XENIX	PID_03hXENIX usr (see [02h](pid-02h) and [FFh](pid-ffh))
04h	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	File system	Microsoft	DOS 3.0+	PID_04hFAT16 with less than 65,536 sectors (32 MB). As primary partition it must reside in first physical 32 MB of disk, or as logical drive anywhere on disk (else use [06h](pid-06h) instead).
05h	MBR, EBR	CHS, (LBA)	, AAP	Container	IBM	Some versions of DOS 3.2, DOS 3.3+	PID_05hExtended partition with CHS addressing. It must reside within the first physical 8 GB of disk, else use [0Fh](pid-0fh) instead (see [0Fh](pid-0fh), [85h](pid-85h), [C5h](pid-c5h), [D5h](pid-d5h))
06h	MBR, EBR	CHS, LBA	x86	File system	Compaq	DOS 3.31+	PID_06hFAT16B with 65,536 or more sectors. It must reside within the first 8 GB of disk unless used for logical drives in an [0Fh](pid-0fh) extended partition (else use [0Eh](pid-0eh) instead). Also used for FAT12 and FAT16 volumes in primary partitions if they are not residing in first physical 32 MB of disk.
07h	MBR, EBR	CHS, LBA	x86	File system	Microsoft, IBM	OS/2 1.2+	PID_07hIFS
MBR, EBR	CHS, LBA	286	File system	IBM	OS/2 1.2+, Windows NT	HPFS
MBR, EBR	CHS, LBA	386	File system	Microsoft	Windows NT	NTFS
MBR, EBR	CHS, LBA		File system	Microsoft	Windows Embedded CE	exFAT
			File system	Quantum Software Systems	QNX 2	QNX "qnx" (7) (pre-1988 only)
08h	MBR	CHS	x86	File system	Commodore	Commodore MS-DOS 3.x	PID_08hLogical sectored FAT12 or FAT16
	CHS	x86	File system	IBM	OS/2 1.0-1.3	OS/2 (FAT?)
			File system	IBM	AIX	AIX boot/split
			File system	Quantum Software Systems	QNX 1.x/2.x	QNX "qny" (8)
			Container	Dell		Partition spanning multiple drives
09h				File system	IBM	AIX	PID_09hAIX data/boot
			File system	Quantum Software Systems	QNX 1.x/2.x	QNX "qnz" (9)
MBR	CHS	286	File system	Mark Williams Company	Coherent	Coherent file system
MBR			File system	Microware	OS-9	OS-9 RBF
0Ah				Service	PowerQuest, IBM	OS/2	PID_0AhOS/2 Boot Manager
			Swap	Mark Williams Company	Coherent	Coherent swap partition
0Bh	MBR, EBR	CHS, LBA	x86	File system	Microsoft	DOS 7.1+	PID_0BhFAT32 with CHS addressing
0Ch	MBR, EBR	LBA	x86	File system	Microsoft	DOS 7.1+	PID_0ChFAT32 with LBA
0Eh	MBR, EBR	LBA	x86	File system	Microsoft	DOS 7.0+	PID_0EhFAT16B with LBA
0Fh	MBR, EBR	LBA	, AAP	Container	Microsoft	DOS 7.0+	PID_0FhExtended partition with LBA (see [05h](pid-05h) and [CFh](pid-cfh))
11h	MBR	CHS	x86	File system	Leading Edge	Leading Edge MS-DOS 3.x	PID_11hLogical sectored FAT12 or FAT16
			Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT12 (corresponds with [01h](pid-01h))
12h	MBR	CHS, LBA	x86	Service FS	Compaq		PID_12hConfiguration partition (bootable FAT with MS-DOS); Recovery partition (bootable FAT32 with Windows setup)
MBR		x86	Service	Gang of Nine	EISA machines	EISA configuration utility for the system
			Hibernation	Compaq	Compaq Contura	Hibernation partition
MBR		x86	Service FS	NCR		Diagnostics and firmware partition (bootable FAT)
MBR		x86	Service FS	Intel		Service partition (bootable FAT) (see [98h](pid-98h))
			Service FS	IBM		Rescue and Recovery partition
14h				File system	AST	AST MS-DOS 3.x	PID_14hLogical sectored FAT12 or FAT16 (see AST MBR)
		x86, 68000, 8080/Z80	Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT16 (corresponds with [04h](pid-04h))
	LBA	x86	File system	Lasse Krogh Thygesen	Maverick OS	url=http://www.maverick-os.dk/FileSystemFormats/FileSystemIdentifiers.html	title=Maverick - The Operating System - File System Identifiers
15h			, AAP	Hidden container	IBM	OS/2 Boot Manager	PID_15hHidden extended partition with CHS addressing (corresponds with [05h](pid-05h))
	LBA	No	Swap	Lasse Krogh Thygesen	Maverick OS	Swap
16h			x86, 68000, 8080/Z80	Hidden FS	IBM	OS/2 Boot Manager	PID_16hHidden FAT16B (corresponds with [06h](pid-06h))
17h				Hidden FS	IBM	OS/2 Boot Manager	PID_17hHidden IFS (corresponds with [07h](pid-07h))
Hidden HPFS (corresponds with [07h](pid-07h))
Hidden NTFS (corresponds with [07h](pid-07h))
Hidden exFAT (corresponds with [07h](pid-07h))
18h				Hibernation	AST	AST Windows	PID_18hAST Zero Volt Suspend or SmartSleep partition
19h					Willow Schlanger	Willowtech Photon coS	PID_19hWillowtech Photon coS (see [20h](pid-20h))
1Bh				Hidden FS	IBM	OS/2 Boot Manager	PID_1BhHidden FAT32 (corresponds with [0Bh](pid-0bh))
1Ch				Hidden FS	IBM	OS/2 Boot Manager	PID_1ChHidden FAT32 with LBA (corresponds with [0Ch](pid-0ch))
			Service FS	ASUS	ASUS eRecovery	ASUS recovery partition (Hidden FAT32 with LBA, see [0Ch](pid-0ch))
1Eh				Hidden FS	IBM	OS/2 Boot Manager	PID_1EhHidden FAT16 with LBA (corresponds with [0Eh](pid-0eh))
1Fh	MBR, EBR	LBA		Hidden container	IBM	OS/2 Boot Manager	PID_1FhHidden extended partition with LBA addressing (corresponds with [0Fh](pid-0fh))
20h			?	File system	Microsoft	Windows Mobile	PID_20hWindows Mobile update XIP
			File system	Willow Schlanger		Willowsoft Overture File System (OFS1) (see [19h](pid-19h))
21h	MBR			?	Hewlett-Packard	HP Volume Expansion	PID_21h
			File system	Dave Poirier	Oxygen	FSo2 (Oxygen File System) (see [22h](pid-22h))
22h				Container	Dave Poirier	Oxygen	PID_22hOxygen Extended Partition Table (see [21h](pid-21h))
23h				File system	Microsoft	Windows Mobile	Windows Mobile boot XIP
24h	MBR	CHS	x86	File system	NEC	NEC MS-DOS 3.30	PID_24hLogical sectored FAT12 or FAT16 (see NEC MBR)
27h				Service FS	Microsoft	Windows	PID_27hWindows Recovery Environment (RE) partition (hidden NTFS partition type [07h](pid-07h))
MBR	LBA		Service FS	Acer	D2D eRecovery	Rescue partition (Hidden NTFS labeled "PQService", corresponds to [07h](pid-07h))
			Service	MikroTik	Linux (RouterBOARD 500)	RooterBOOT kernel partition (contains a raw ELF Linux kernel, no file system)
2Ah				File system	Kurt Skauen	AtheOS	PID_2AhAtheOS file system (AthFS, AFS) (an extension of BFS, see [2Bh](pid-2bh) and [EBh](pid-ebh))
MBR, EBR	LBA	x86	File system			Reserved (see [CAh](pid-cah))
2Bh				File system	Kristian van der Vliet	SyllableOS	PID_2BhSyllableSecure (SylStor), a variant of AthFS (an extension of BFS, see [2Ah](pid-2ah) and [EBh](pid-ebh))
30h	MBR	CHS	x86	File system	Digital Research	Personal CP/M-86	Found in some OEM Siemens systems instead of [DBh](pid-dbh). Filesystem parameters are in the following sector (LBA 1), not the partition itself.
31h					Microsoft, IBM		PID_31hReserved
32h	MBR	Yes	Container		Alien Internet Services	nOS	PID_32hUsed as a container for nOS partitions (kernel and driver caching, user file storage, swap, etc.)
33h					Microsoft, IBM		PID_33hReserved
34h					Microsoft, IBM		PID_34hReserved
35h	MBR, EBR	CHS, LBA		File system	IBM	OS/2 Warp Server / eComStation	PID_35hJFS (OS/2 implementation of AIX Journaling File system)
36h					Microsoft, IBM		PID_36hReserved
38h				File system	Timothy Williams	THEOS	PID_38hTHEOS version 3.2, 2 GB partition
39h				Container	Bell Labs	Plan 9	PID_39hPlan 9 edition 3 partition (sub-partitions described in second sector of partition)
			File system	Timothy Williams	THEOS	THEOS version 4 spanned partition
3Ah				File system	Timothy Williams	THEOS	PID_3AhTHEOS version 4, 4 GB partition
3Bh				Container	Timothy Williams	THEOS	PID_3BhTHEOS version 4 extended partition
3Ch				Service	PowerQuest	PartitionMagic	PID_3ChPqRP (PartitionMagic or DriveImage in progress)
3Dh				Hidden FS	PowerQuest	PartitionMagic	PID_3DhHidden NetWare
40h					PICK Systems	PICK	PID_40hPICK R83
				VenturCom	Venix	Venix 80286
41h						Personal RISC	PID_41hPersonal RISC Boot
				Linux	Linux	Old Linux/Minix (disk shared with DR DOS 6.0) (corresponds with [81h](pid-81h))
		PowerPC		PowerPC	PowerPC	PPC PReP (Power PC Reference Platform) Boot
42h				Secured FS	Peter Gutmann	SFS	PID_42hSecure File system (SFS)
				Linux	Linux	Old Linux swap (disk shared with DR DOS 6.0) (corresponds with [82h](pid-82h))
			Container	Microsoft	Windows 2000, XP, etc.	Dynamic extended partition marker
43h				File system	Linux	Linux	PID_43hOld Linux native (disk shared with DR DOS 6.0) (corresponds with [83h](pid-83h))
44h					Wildfile	GoBack	PID_44hNorton GoBack, WildFile GoBack, Adaptec GoBack, Roxio GoBack
45h		CHS			Priam		PID_45hPriam (see also [5Ch](pid-5ch))
MBR	CHS				Boot-US	Boot-US boot manager (1 cylinder)
				Jochen Liedtke, GMD	EUMEL/ELAN	EUMEL/ELAN (L2)
46h					Jochen Liedtke, GMD	EUMEL/ELAN	PID_46hEUMEL/ELAN (L2)
47h					Jochen Liedtke, GMD	EUMEL/ELAN	PID_47hEUMEL/ELAN (L2)
48h					Jochen Liedtke, GMD	EUMEL/ELAN	PID_48hEUMEL/ELAN (L2), ERGOS L3
4Ah	MBR				Nick Roberts	AdaOS	PID_4AhAquila (see [7Fh](pid-7fh))
MBR, EBR	CHS, LBA		File system	Mark Aitchison	ALFS/THIN	ALFS/THIN advanced lightweight file system for DOS
4Ch					ETH Zürich	ETH Oberon	PID_4ChAos (A2) file system (76)
4Dh					Quantum Software Systems	QNX 4.x, Neutrino	PID_4DhPrimary QNX POSIX volume on disk (77)
4Eh					Quantum Software Systems	QNX 4.x, Neutrino	PID_4EhSecondary QNX POSIX volume on disk (78)
4Fh					Quantum Software Systems	QNX 4.x, Neutrino	PID_4FhTertiary QNX POSIX volume on disk (79)
				ETH Zürich	ETH Oberon	Boot / native file system (79)
50h					ETH Zürich	ETH Oberon	PID_50hAlternative native file system (80)
				Ontrack	Disk Manager 4	Read-only partition (old)
					LynxOS	Lynx RTOS
					Novell
51h					Novell		PID_51h
				Ontrack	Disk Manager 4-6	Read-write partition (Aux 1)
52h	MBR	CHS		File system	Digital Research	CP/M-80	PID_52hCP/M-80
				Microport	System V/AT, V/386
53h					Ontrack	Disk Manager 6	PID_53hAuxiliary 3 (WO)
54h					Ontrack	Disk Manager 6	PID_54hDynamic Drive Overlay (DDO)
55h					MicroHouse / StorageSoft	EZ-Drive	PID_55hEZ-Drive, Maxtor, MaxBlast, or DriveGuide INT 13h redirector volume
56h					AT&T	AT&T MS-DOS 3.x	PID_56hLogical sectored FAT12 or FAT16
				MicroHouse / StorageSoft	EZ-Drive	Disk Manager partition converted to EZ-BIOS
				Golden Bow	VFeature	VFeature partitioned volume
57h					MicroHouse / StorageSoft	DrivePro	PID_57h
				Novell		VNDI partition
59h	MBR, EBR	CHS, LBA		File system	Yocto	yocOS	yocFS
5Ch		CHS		Container	Priam	EDISK	PID_5ChPriam EDisk Partitioned Volume (see also [45h](pid-45h))
61h	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	PID_61hHidden FAT12 (corresponds to [E1h](pid-e1h))SpeedStor is an extended storage support driver for DOS for IBM PC/XT (v. 6.03) and IBM PC/AT (v. 6.5). Its custom partition types are [E1h](pid-e1h), [E4h](pid-e4h) and [F4h](pid-f4h) which can be marked read-only (becoming [E3h](pid-e3h), [E6h](pid-e6h), [F6h](pid-f6h)), hidden ([61h](pid-61h), [64h](pid-64h), [74h](pid-74h)) or hidden read-only ([63h](pid-63h), [66h](pid-66h), [76h](pid-76h)).
63h		CHS		File system	AT&T	SCO Unix, ISC, UnixWare, AT&T System V/386, ix, MtXinu BSD 4.3 on Mach	PID_63h
	CHS		File system	Mach and BSD	GNU/Hurd	PID_63hOld GNU/Hurd with UFS support (corresponds with [83h](pid-83h))
MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden read-only FAT12 (corresponds to [E3h](pid-e3h))
64h				?	Storage Dimensions	SpeedStor	PID_64hHidden FAT16 (corresponds to [E4h](pid-e4h))
			File system	Novell	NetWare	NetWare File System 286/2
			Secured FS	Solomon		PC-ARMOUR
65h				File system	Novell	NetWare	PID_65hNetWare File System 386
66h				?	Novell	NetWare	PID_66hStorage Management Services (SMS)
MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden read-only FAT16 (corresponds to [E6h](pid-e6h))
67h				?	Novell	NetWare	PID_67hWolf Mountain cluster
68h				?	Novell	NetWare	PID_68h
69h				?	Novell	NetWare 5	PID_69h
			?	Novell	NetWare	Novell Storage Services (NSS)
6Ch	MBR	CHS, LBA	x86	Container	DragonFly BSD	BSD	PID_6ChBSD slice (DragonFly BSD)
70h				Service		DiskSecure	PID_70hDiskSecure multiboot
71h					Microsoft, IBM		PID_71hReserved
72h	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	PID_72hAPTI alternative FAT12 (CHS, SFN) (corresponds with [01h](pid-01h))
			File system	Nordier	Unix V7/x86	V7/x86
73h					Microsoft, IBM		PID_73hReserved
74h	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	PID_74hHidden FAT16B (corresponds to [F4h](pid-f4h))
75h				File system	IBM	PC/IX	PID_75h
76h					Storage Dimensions	SpeedStor	PID_76hHidden read-only FAT16B (corresponds to [F6h](pid-f6h))
77h				File system	Novell		PID_77hVNDI, M2FS, M2CS
78h				File system	Geurt Vos		PID_78hXOSL bootloader file system
79h	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	PID_79hAPTI alternative FAT16 (CHS, SFN) (corresponds with [04h](pid-04h))
7Ah	MBR, EBR	LBA	x86	Policy FS		APTI conformant systems	PID_7AhAPTI alternative FAT16 (LBA, SFN) (corresponds with [0Eh](pid-0eh))
7Bh	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	PID_7BhAPTI alternative FAT16B (CHS, SFN) (corresponds with [06h](pid-06h))
7Ch	MBR, EBR	LBA	x86	Policy FS		APTI conformant systems	PID_7ChAPTI alternative FAT32 (LBA, SFN) (corresponds with [0Ch](pid-0ch))
7Dh	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	PID_7DhAPTI alternative FAT32 (CHS, SFN) (corresponds with [0Bh](pid-0bh))
7Eh	MBR, EBR			Cache	Romex Software	PrimoCache	Level 2 cache
7Fh	MBR, EBR				Alternative OS Development Partition Standard		PID_7Fh Reserved for individual or local use and temporary or experimental projects
80h				File system	Andrew Tanenbaum	Minix 1.1-1.4a	PID_80hMINIX file system (old)
81h				File system	Andrew Tanenbaum	Minix 1.4b+	PID_81hMINIX file system (corresponds with [41h](pid-41h))
82h				Swap	Linux	Linux	PID_82hLinux swap space (corresponds with [42h](pid-42h))
			Swap	Linux	GNU/Hurd	PID_82hGNU/Hurd (Hurd uses the same Linux swap file system)
		x86	Container	Sun Microsystems		PID_82hSolaris x86 (for Sun disklabels up to 2005) (see [BFh](pid-bfh))
83h				File system	Linux	Linux	PID_83hAny native Linux file system (see [93h](pid-93h), corresponds with [43h](pid-43h))
			File system	Linux	GNU/Hurd	PID_83hGNU/Hurd (Hurd and GRUB use the same Linux ext2 file system to run and it no longer supports UFS file system, corresponds with [63h](pid-63h))
84h				Hibernation	Microsoft	?	PID_84hAPM hibernation (suspend to disk, S2D)
			Hidden FS	IBM	OS/2	Hidden C: (FAT16)(corresponds to either 04h or 06h)
			Hibernation	Intel	Rapid Start technology	Intel SRT]] SSD cache as well)
85h			, AAP	Container	Linux	Linux	PID_85hLinux extended (corresponds with [05h](pid-05h))
86h				File system	Microsoft	Windows NT 4 Server	PID_86hFault-tolerant FAT16B mirrored volume set (see [B6h](pid-b6h) and [C6h](pid-c6h), corresponds with [06h](pid-06h))
			Service	Linux	Linux	Linux RAID superblock with auto-detect (old) (see [FDh](pid-fdh))
87h				File system	Microsoft	Windows NT 4 Server	PID_87hFault-tolerant HPFS/NTFS mirrored volume set (see [B7h](pid-b7h) and [C7h](pid-c7h), corresponds with [07h](pid-07h))
88h				Service	Linux	Linux	PID_88hLinux plaintext partition table
8Ah				Service	Martin Kiewitz	AirBoot	PID_8AhAirBoot is a track0 Boot Manager with on-the-fly partition detection
8Bh				File system	Microsoft	Windows NT 4 Server	PID_8BhLegacy fault-tolerant FAT32 mirrored volume set (see [BBh](pid-bbh) and [CBh](pid-cbh), corresponds with [0Bh](pid-0bh))
8Ch				File system	Microsoft	Windows NT 4 Server	PID_8ChLegacy fault-tolerant FAT32 mirrored volume set (see [BCh](pid-bch) and [CCh](pid-cch), corresponds with [0Ch](pid-0ch))
8Dh	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	Hidden FS	FreeDOS	Free FDISK	PID_8DhHidden FAT12 (corresponds with [01h](pid-01h))
8Eh				Container	Linux	Linux	PID_8EhLinux LVM since 1999 (see [FEh](pid-feh))
90h	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	Hidden FS	FreeDOS	Free FDISK	PID_90hHidden FAT16 (corresponds with [04h](pid-04h))
91h	MBR, EBR	CHS, LBA	, AAP	Hidden container	FreeDOS	Free FDISK	PID_91hHidden extended partition with CHS addressing (corresponds with [05h](pid-05h))
92h	MBR, EBR	CHS, LBA	x86	Hidden FS	FreeDOS	Free FDISK	PID_92hHidden FAT16B (corresponds with [06h](pid-06h))
93h				File system	Andrew S. Tanenbaum	Amoeba	PID_93hAmoeba native file system
			Hidden FS		Linux	Hidden Linux file system (see [83h](pid-83h))
94h				Service	Andrew S. Tanenbaum	Amoeba	PID_94hAmoeba bad block table
95h				File system	MIT	EXOPC	PID_95hEXOPC native
96h				File system	?	CHRP	PID_96hISO-9660 file system
97h	MBR, EBR	CHS, LBA	x86	Hidden FS	FreeDOS	Free FDISK	PID_97hHidden FAT32 (corresponds with [0Bh](pid-0bh))
98h	MBR, EBR	LBA	x86	Hidden FS	FreeDOS	Free FDISK	PID_98hHidden FAT32 (corresponds with [0Ch](pid-0ch))
MBR	CHS, LBA	x86	Service FS	Datalight	ROM-DOS	Service partition (bootable FAT) ROM-DOS SuperBoot (see [12h](pid-12h))
MBR	CHS, LBA	x86	Service FS	Intel	?	Service partition (bootable FAT) (see [12h](pid-12h))
99h				File system	?	?	PID_99hEarly Unix
9Ah	MBR, EBR	LBA	x86	Hidden FS	FreeDOS	Free FDISK	PID_9AhHidden FAT16 (corresponds with [0Eh](pid-0eh))
9Bh	MBR, EBR	LBA	, AAP	Hidden container	FreeDOS	Free FDISK	PID_9BhHidden extended partition with LBA (corresponds with [0Fh](pid-0fh))
9Eh				File system	Andy Valencia	VSTa	PID_9Eh
			File system	Andy Valencia	ForthOS	url=http://www.forthos.org/setup.html	title=ForthOS setup instructions
9Fh				?	?	BSD/OS 3.0+, BSDI	PID_9Fh (see [B7h](pid-b7h) and [B8h](pid-b8h))
A0h	MBR			Service FS	Hewlett-Packard	?	PID_A0hDiagnostic partition for HP laptops
			Hibernation	Phoenix, IBM, Toshiba, Sony	?	Hibernate partition
					AiR-BOOT	AiR-BOOT (see [8Ah](pid-8ah))
A1h				?	Hewlett-Packard	HP Volume Expansion	PID_A1h
			Hibernation	Phoenix, NEC	?	Hibernate partition
A2h	MBR	CHS, LBA	ARM	Image	Altera	Cyclone V	PID_A2hHard Processor System (HPS) ARM preloader
A3h				?	Hewlett-Packard	HP Volume Expansion	PID_A3h
A4h				?	Hewlett-Packard	HP Volume Expansion	PID_A4h
A5h	MBR			Container	FreeBSD	BSD	PID_A5hBSD slice (BSD/386, 386BSD, NetBSD (before 1998-02-19), FreeBSD)
A6h				?	Hewlett-Packard	HP Volume Expansion	PID_A6h
MBR			Container	OpenBSD	OpenBSD	OpenBSD slice
A7h			386	File system	NeXT	NeXTSTEP	PID_A7h
A8h				File system	Apple	Darwin, Mac OS X	PID_A8hApple Darwin, Mac OS X UFS
A9h	MBR			Container	NetBSD	NetBSD	PID_A9hNetBSD slice
AAh	MBR	CHS	?	File system	Olivetti	MS-DOS	PID_AAhOlivetti MS-DOS FAT12 (1.44 MB) (corresponds with [06h](pid-06h))
ABh				Service	Apple	Darwin, Mac OS X	PID_ABhApple Darwin, Mac OS X boot
			File system	Stanislav Karchebny	GO! OS	GO!
ACh				Service	Apple	Darwin, Mac OS X	PID_AChApple RAID, Mac OS X RAID
ADh				File system	Ben Avison, Acorn	RISC OS	PID_ADhADFS / FileCore format
AEh			x86	File system	Frank Barrus	ShagOS	PID_AEhShagOS file system
AFh			?	File system	Apple	Mac OS X	PID_AFhHFS and HFS+
			Swap	Frank Barrus	ShagOS	ShagOS swap
B0h	MBR	CHS, LBA	x86	Blocker	Star-Tools	Boot-Star	PID_B0hBoot-Star dummy partition
B1h				?	Hewlett-Packard	HP Volume Expansion	PID_B1h
			File system	QNX Software Systems	QNX 6.x	QNX Neutrino power-safe file system
B2h				File system	QNX Software Systems	QNX 6.x	PID_B2hQNX Neutrino power-safe file system
B3h				?	Hewlett-Packard	HP Volume Expansion	PID_B3h
			File system	QNX Software Systems	QNX 6.x	QNX Neutrino power-safe file system
B4h				?	Hewlett-Packard	HP Volume Expansion	PID_B4h
B6h				?	Hewlett-Packard	HP Volume Expansion	PID_B6h
	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT16B mirrored master volume (see [C6h](pid-c6h) and [86h](pid-86h), corresponds with [06h](pid-06h))
B7h				File system		BSDI (before 3.0)	PID_B7hBSDI native file system / swap (see [B8h](pid-b8h) and [9Fh](pid-9fh))
	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant HPFS/NTFS mirrored master volume (see [C7h](pid-c7h) and [87h](pid-87h), corresponds with [07h](pid-07h))
B8h				File system		BSDI (before 3.0)	PID_B8hBSDI swap / native file system (see [B7h](pid-b7h) and [9Fh](pid-9fh))
BBh				Hidden FS	PhysTechSoft, Acronis, SWsoft	BootWizard, OS Selector	PID_BBhPTS BootWizard 4 / OS Selector 5 for hidden partitions other than [01h](pid-01h), [04h](pid-04h), [06h](pid-06h), [07h](pid-07h), [0Bh](pid-0bh), [0Ch](pid-0ch), [0Eh](pid-0eh) and unformatted partitions
MBR			Service FS	Acronis	Acronis True Image	OEM Secure Zone (corresponds to [BCh](pid-bch))
EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored master volume (see [CBh](pid-cbh) and [8Bh](pid-8bh), corresponds with [0Bh](pid-0bh))
BCh	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored master volume (see [CCh](pid-cch) and [8Ch](pid-8ch), corresponds with [0Ch](pid-0ch))
MBR	LBA		Service FS	Acronis	Acronis True Image	Acronis Secure Zone
MBR, EBR			Service FS	Paragon Software Group	Backup Capsule	Backup Capsule
BDh				File system	?	BonnyDOS/286	PID_BDh
BEh				File system	Sun Microsystems	Solaris 8	PID_BEhSolaris 8 boot
BFh			x86	Container	Sun Microsystems	Solaris	PID_BFhSolaris x86 (for Sun disklabels, since 2005) (see [82h](pid-82h))
C0h	MBR	CHS, LBA	x86	Secured container	Novell, IMS	DR-DOS, Multiuser DOS, REAL/32	PID_C0hSecured FAT partition (smaller than 32 MB)
C1h	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	PID_C1hSecured FAT12 (corresponds with [01h](pid-01h))
C2h				Hidden FS	BlueSky Innovations	Power Boot	PID_C2hHidden Linux native file system
C3h				Hidden swap	BlueSky Innovations	Power Boot	PID_C3hHidden Linux swap
C4h	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	PID_C4hSecured FAT16 (corresponds with [04h](pid-04h))
C5h	MBR, EBR	CHS, LBA	, AAP	Secured container	Digital Research	DR DOS 6.0+	PID_C5hSecured extended partition with CHS addressing (corresponds with [05h](pid-05h))
C6h	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	PID_C6hSecured FAT16B (corresponds with [06h](pid-06h))
EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT16B mirrored slave volume (see [B6h](pid-b6h) and [86h](pid-86h), corresponds with [06h](pid-06h))
C7h	MBR			File system		Syrinx	PID_C7hSyrinx boot
EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant HPFS/NTFS mirrored slave volume (see [B7h](pid-b7h) and [87h](pid-87h), corresponds with [07h](pid-07h))
C8h					?		Reserved for DR-DOS since 1997
C9h					?		Reserved for DR-DOS since 1997
CAh					?		Reserved for DR-DOS since 1997
CBh	MBR, EBR	CHS, LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	PID_CBhSecured FAT32 (corresponds with [0Bh](pid-0bh))
EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored slave volume (see [BBh](pid-bbh) and [8Bh](pid-8bh), corresponds with [0Bh](pid-0bh))
CCh	MBR, EBR	LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	PID_CChSecured FAT32 (corresponds with [0Ch](pid-0ch))
EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored slave volume (see [BCh](pid-bch) and [8Ch](pid-8ch), corresponds with [0Ch](pid-0ch))
CDh				Service	Convergent Technologies, Unisys	CTOS	PID_CDhMemory dump (see [DDh](pid-ddh) and [DBh](pid-dbh))
MBR	LBA	x86	File system	openSUSE	Linux	openSUSE ISOHybrid ISO9660 partition (from openSUSE Leap "Live" x86 images)
CEh	MBR, EBR	LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	PID_CEhSecured FAT16B (corresponds with [0Eh](pid-0eh))
CFh	MBR, EBR	LBA	, AAP	Secured container	Caldera	DR-DOS 7.0x	PID_CFhSecured extended partition with LBA (corresponds with [0Fh](pid-0fh))
D0h	MBR	CHS, LBA	386	Secured container	Novell, IMS	Multiuser DOS, REAL/32	PID_D0hSecured FAT partition (larger than 32 MB)
D1h	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	PID_D1hSecured FAT12 (corresponds with [01h](pid-01h))
D4h	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	PID_D4hSecured FAT16 (corresponds with [04h](pid-04h))
D5h	MBR, EBR	CHS		Secured container	Novell	Multiuser DOS	PID_D5hSecured extended partition with CHS addressing (corresponds with [05h](pid-05h))
D6h	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	PID_D6hSecured FAT16B (corresponds with [06h](pid-06h))
D8h	MBR	CHS		File system	Digital Research	CP/M-86	PID_D8hCP/M-86 (see [DBh](pid-dbh))
DAh				Service	John Hardin		PID_DAhNon-file system data
			Secured FS	DataPower	Powercopy Backup	Shielded disk
DBh	MBR	CHS	x86	File system	Digital Research	CP/M-86, Concurrent CP/M-86, Concurrent DOS	PID_DBh (see [D8h](pid-d8h))
			?	Convergent Technologies, Unisys	CTOS	? (see [CDh](pid-cdh) and [DDh](pid-ddh))
		x86	Service	KDG Telemetry	D800	boot image for x86 supervisor CPU (SCPU) module
MBR	CHS, LBA	x86	Service FS	Dell	DRMK	FAT32 system restore partition (DSR) (see [DEh](pid-deh))
DDh				Service	Convergent Technologies, Unisys	CTOS	PID_DDhHidden memory dump (see [CDh](pid-cdh) and [DBh](pid-dbh))
DEh	MBR	CHS, LBA	x86	Hidden FS	Dell		PID_DEhFAT16 utility/diagnostic partition
DFh				?	Data General	DG/UX	PID_DFhDG/UX virtual disk manager
MBR			Blocker	TeraByte Unlimited	BootIt	EMBRM
			?	?	Aviion
E0h				File system	STMicroelectronics		PID_E0hST AVFS
E1h	MBR	CHS		File system	Storage Dimensions	SpeedStor	PID_E1hFAT12 (≤16 MB) (corresponds to [01h](pid-01h))
E3h				File system	Storage Dimensions	SpeedStor	PID_E3hRead-only FAT12 (corresponds to [E1h](pid-e1h))
E4h	MBR	CHS		File system	Storage Dimensions	SpeedStor	PID_E4hFAT16 (≤32 MB) (corresponds to [04h](pid-04h))
E5h	MBR	CHS	x86	File system	Tandy	Tandy MS-DOS	PID_E5hLogical sectored FAT12 or FAT16
E6h				File System	Storage Dimensions	SpeedStor	PID_E6hRead-only FAT16 (corresponds to [E4h](pid-e4h))
E8h	MBR, EBR	CHS, LBA		Service	Linux	LUKS	PID_E8hLinux Unified Key Setup
EBh			386	File system	Be Inc.	BeOS, Haiku	PID_EBhBFS (see [2Ah](pid-2ah) and [2Bh](pid-2bh))
ECh				File system	Robert Szeleney	SkyOS	PID_EChSkyFS
EDh	MBR, EBR	CHS, LBA	x86	Service	Matthias R. Paul	Sprytix	PID_EDhEDC loader
MBR	CHS, LBA	x86		Hewlett-Packard	EFI	Was proposed for GPT hybrid MBRWas suggested in now-superseded T13 EDD 4 proposal e09127r1 (2009). The successor e09127r3 (2010) now recommends to use a normal partition type (the one that a legacy OS would see) instead of this special value.
EEh	MBR			Blocker	Microsoft	EFI	PID_EEhGPT protective MBR (see [EFh](pid-efh))
EFh	MBR			Service FS	Intel	EFI	PID_EFhEFI system partition. Can be a FAT12, FAT16, FAT32 (or other) file system (see [EEh](pid-eeh))
F0h		CHS		Service		Linux	PID_F0hPA-RISC Linux boot loader; must reside in first physical 2 GB
F2h	MBR	CHS	x86	File system	Sperry IT, Unisys, Digital Research	Sperry IT MS-DOS 3.x, Unisys MS-DOS 3.3, Digital Research DOS Plus 2.1	PID_F2hLogical sectored FAT12 or FAT16 secondary partition
F4h	MBR	CHS		File system	Storage Dimensions	SpeedStor	PID_F4hFAT16B (corresponds to [06h](pid-06h))
			File system	?	Prologue	Single volume partition for NGF or TwinFS
F5h				Container	?	Prologue	PID_F5hMD0-MD9 multi volume partition for NGF or TwinFS
F6h	MBR			File system	Storage Dimensions	SpeedStor	PID_F6hRead-only FAT16B (corresponds to [F4h](pid-f4h))
F7h				File system	Natalia Portillo	O.S.G.	PID_F7hEFAT
			File system	DDRdrive	X1	Solid State file system
F8h	MBR			Service	Arm	Arm EBBR 1.0	Protective partition for the area containing system firmware
F9h				Cache	ALC Press	Linux	PID_F9hpCache ext2/ext3 persistent cache
FBh				File system	VMware	VMware ESX	PID_FBhVMware VMFS file system partition
FCh				Swap	VMware	VMware ESX	PID_FChVMware swap / VMKCORE kernel dump partition
FDh				Service	Linux	Linux	PID_FDhLinux RAID superblock with auto-detect (see [86h](pid-86h))
FEh				Service	IBM	PS/2	PID_FEhPS/2 IML partition
MBR	CHS, LBA	x86	Service FS	IBM	PS/2	PS/2 recovery partition (FAT12 reference disk floppy image), (corresponds with [01h](pid-01h) if activated, all other partitions +10h then)
			Service	Linux	Linux	Old Linux LVM (see [8Eh](pid-8eh))
FFh	MBR	CHS		Service	Microsoft	XENIX	PID_FFhXENIX bad block table (see [02h](pid-02h) and [03h](pid-03h))
::

Notes

MS-DOS/PC DOS 2.0-3.1 cannot cope with hard disk partitions outside the first 32 MB of the disk. Therefore, FAT12 and FAT16 volumes in primary partitions physically residing outside this area must not use partition IDs [01h](pid-01h) and [04h](pid-04h), even if they were otherwise small enough to be recognized by these DOS versions. In order to hide these volumes from these DOS issues [06h](pid-06h) can be used instead. DOS distinguishes FAT types by their number of clusters, not by their partition ID, therefore, this does not cause any problems for DOS 3.31 and higher except for a possibly wrong file system type display in FDISK. Used by OS/2 Boot Manager: [0Ah](pid-0ah), [11h](pid-11h), [14h](pid-14h), [15h](pid-15h), [16h](pid-16h), [17h](pid-17h), [1Bh](pid-1bh), [1Ch](pid-1ch), [1Eh](pid-1eh), [1Fh](pid-1fh). Used by Free FDISK of FreeDOS: [8Dh](pid-8dh), [90h](pid-90h), [91h](pid-91h), [92h](pid-92h), [97h](pid-97h), [98h](pid-98h), [9Ah](pid-9ah), [9Bh](pid-9bh). Known partition IDs for logical sectored FATs include: 08h (Commodore MS-DOS 3.x), 11h (Leading Edge MS-DOS 3.x), 14h (AST MS-DOS 3.x), 24h (NEC MS-DOS 3.30), 56h (AT&T MS-DOS 3.x), E5h (Tandy MS-DOS), F2h (Sperry IT MS-DOS 3.x, Unisys MS-DOS 3.3 — also used by Digital Research DOS Plus 2.1). While non-standard and sub-optimal these FAT variants are perfectly valid according to the specifications of the file system itself, although default issues of MS-DOS / PC DOS 3.x were not able to cope with them. Most of these vendor specific FAT12 and FAT16 variants can be mounted by more flexible file system implementations in operating systems such as DR-DOS simply by changing the partition ID to one of the recognized types. Also, if they no longer need to be recognized by their original operating systems, existing partitions can be "converted" into FAT12 and FAT16 volumes compliant with versions of MS-DOS/PC DOS like 5.0-6.3, which do not support logical sector sizes different from 512 bytes, by switching to a BPB with 32-bit entry for the number of sectors, as introduced since DOS 3.31, keeping the cluster size and reducing the logical sector size in the BPB down to 512 bytes, while at the same time increasing the counts of logical sectors per cluster, reserved logical sectors, total logical sectors, and logical sectors per FAT by the same factor. HP Volume Expansion is a variant of SpeedStor and uses partition IDs [21h](pid-21h), [A1h](pid-a1h), [A3h](pid-a3h), [A4h](pid-a4h), [A6h](pid-a6h), [B1h](pid-b1h), [B3h](pid-b3h), [B4h](pid-b4h), and [B6h](pid-b6h). Apple Mac OS X uses partition IDs [A8h](pid-a8h), [ABh](pid-abh), [ACh](pid-ach), and [AFh](pid-afh). Versions of DR DOS 6.0 and higher use several of these partition IDs for secured FAT partitions with single-user security: [C0h](pid-c0h), [C1h](pid-c1h), [C4h](pid-c4h), [C5h](pid-c5h), [C6h](pid-c6h), [CBh](pid-cbh), [CCh](pid-cch), [CEh](pid-ceh), [CFh](pid-cfh). Versions of Multiuser DOS use these partition IDs for secured FAT partitions with multi-user security: [D0h](pid-d0h), [D1h](pid-d1h), [D4h](pid-d4h), [D5h](pid-d5h), [D6h](pid-d6h). Versions of IMS REAL/32 use partition IDs [C0h](pid-c0h) and [D0h](pid-d0h) for multi-user security. QNX partition IDs [07h](pid-07h), [08h](pid-08h), [09h](pid-09h), [4Dh](pid-4dh) (77), [4Eh](pid-4eh) (78), [4Fh](pid-4fh) (79), as well as [B1h](pid-b1h) (177), [B2h](pid-b2h) (178) and [B3h](pid-b3h) (179).

References

| title=Virtual Disk Service (VDS advanced clean method) | url=http://msdn.microsoft.com/en-us/library/aa381675(v=vs.85).aspx | website=Microsoft Developer Network | date=2011-09-07 | publisher=Microsoft | access-date=2011-09-14}} | url=http://msdn.microsoft.com/en-us/library/dd744364.aspx | title=BIOS-Based Disk-Partition Configurations | website=Microsoft Developer Network | date=2009-10-22 | publisher=Microsoft | access-date=2011-07-24}} |url = http://www.howtofixcomputers.com/bb/ftopic4438.html |title = About PqRP |date = 2003-07-26 |publisher = HowToFixComputers |access-date = 2011-10-14 |url-status = dead |archive-url = https://archive.today/20130125233947/http://www.howtofixcomputers.com/bb/ftopic4438.html |archive-date = 2013-01-25 | url=http://support.microsoft.com/kb/221799 | title=Drive Letters Assigned to Unsupported Partition Types | website=Microsoft Knowledge Base | publisher=Microsoft | date=2007-02-27}} | url=http://tldp.org/HOWTO/Large-Disk-HOWTO-13.html | title=Extended and logical partitions | work=Large Disk HOWTO | author=Andries Brouwer | author-link=Andries Brouwer | year=2004 | access-date=2011-07-19}} | url=http://www.freebsd.org/doc/handbook/disk-organization.html#BASICS-CONCEPT-DISK-MODEL | title=Disk Organization | work=FreeBSD Handbook | year=2011 | publisher=FreeBSD | access-date=2011-07-30}} | url=http://www.netbsd.org/docs/guide/en/chap-inst.html#chap-inst-install-partition | title=Partitions | work=The NetBSD Guide | year=2011 | publisher=NetBSD | access-date=2011-12-30}} | url=http://msdn.microsoft.com/en-us/windows/hardware/gg463525.aspx | title=Windows and GPT FAQ | website=Microsoft Developer Network | date=2011-06-15 | publisher=Microsoft | access-date=2011-07-24}} | publisher=Microsoft TechNet | url=https://technet.microsoft.com/en-us/library/cc977219.aspx | title=Disk Concepts and Troubleshooting | work=Windows 2000 Server | date=11 September 2008 | access-date=2014-06-15}} | publisher=Microsoft TechNet | url=https://technet.microsoft.com/en-us/library/bb457122.aspx | title=Troubleshooting Disks and File Systems | date=2005-11-05 | access-date=2014-06-15}} | title=FYI - Installing DR DOS on NEC DOS 3.3 Partitions | publisher=Novell | date=1993-01-05 | id=FYI.M.1101 | url=http://cd.textfiles.com/netwaresl/NOV_INFO/RNW93/10JAN93.MON | access-date=2014-08-12}} | title=PowerPC Microprocessor Common Hardware Reference Platform (CHRP) | url=http://www.bitsavers.org/pdf/apple/powerpc/CHRP/chrp1_7a.pdf | date=1996-09-23 | access-date=2023-10-28}}

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