Partition type

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

Summarize

Perspective

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.^[1]

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,^[1] new assignments should be coordinated.

In particular temporary partition type assignments for local or experimental projects can utilize type 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.^[2]

List of partition IDs

Summarize

Perspective

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

More information Occurrence, Access ...

Partition ID	Occurrence	Access	Bootable	Type	Origin	Supported by	Description
`00h`	MBR, EBR	—	No	Free	IBM	All	Empty partition entry
`01h`	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	File system	IBM	DOS 2.0+	FAT12 as primary partition in first physical 32 MB of disk or as logical drive anywhere on disk (else use `06h` instead)^[3]^[4]^[5]
`02h`	MBR	CHS	x86, 68000, Z8000, PDP-11	File system	Microsoft, SCO	XENIX	XENIX root (see `03h` and `FFh`)^[3]
`03h`	MBR	CHS	No	File system	Microsoft, SCO	XENIX	XENIX usr (see `02h` and `FFh`)^[3]
`04h`	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	File system	Microsoft	DOS 3.0+	FAT16 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` instead).^[3]^[4]^[5]
`05h`	MBR, EBR	CHS, (LBA)	No, AAP	Container	IBM	Some versions of DOS 3.2, DOS 3.3+	Extended partition with CHS addressing. It must reside within the first physical 8 GB of disk, else use `0Fh` instead (see `0Fh`, `85h`, `C5h`, `D5h`)^[3]^[4]^[5]
`06h`	MBR, EBR	CHS, LBA	x86	File system	Compaq	DOS 3.31+	FAT16B with 65,536 or more sectors. It must reside within the first 8 GB of disk unless used for logical drives in an `0Fh` extended partition (else use `0Eh` instead). Also used for FAT12 and FAT16 volumes in primary partitions if they are not residing in first physical 32 MB of disk.^{[nb 1]}^[3]^[4]^[5]
`07h`	MBR, EBR	CHS, LBA	x86	File system	Microsoft, IBM	OS/2 1.2+	IFS
	MBR, EBR	CHS, LBA	286	File system	IBM	OS/2 1.2+, Windows NT	HPFS^[3]
	MBR, EBR	CHS, LBA	386	File system	Microsoft	Windows NT	NTFS^[4]^[5]
	MBR, EBR	CHS, LBA	Yes	File system	Microsoft	Windows Embedded CE	exFAT
				File system	Quantum Software Systems	QNX 2	QNX "qnx" (7) (pre-1988 only)^[6]^{[nb 2]}
`08h`	MBR	CHS	x86	File system	Commodore	Commodore MS-DOS 3.x	Logical sectored FAT12 or FAT16^{[nb 3]}
		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)^[6]^{[nb 2]}
				Container	Dell		Partition spanning multiple drives
`09h`				File system	IBM	AIX	AIX data/boot
				File system	Quantum Software Systems	QNX 1.x/2.x	QNX "qnz" (9)^[6]^{[nb 2]}
	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	OS/2 Boot Manager^{[nb 4]}
`0Ah`				Swap	Mark Williams Company	Coherent	Coherent swap partition
`0Bh`	MBR, EBR	CHS, LBA	x86	File system	Microsoft	DOS 7.1+	FAT32 with CHS addressing^[4]^[5]
`0Ch`	MBR, EBR	LBA	x86	File system	Microsoft	DOS 7.1+	FAT32 with LBA^[4]^[5]
`0Eh`	MBR, EBR	LBA	x86	File system	Microsoft	DOS 7.0+	FAT16B with LBA^[4]^[5]
`0Fh`	MBR, EBR	LBA	No, AAP	Container	Microsoft	DOS 7.0+	Extended partition with LBA (see `05h` and `CFh`)^[4]^[5]
`11h`	MBR	CHS	x86	File system	Leading Edge	Leading Edge MS-DOS 3.x	Logical sectored FAT12 or FAT16^{[nb 3]}
`11h`				Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT12 (corresponds with `01h`)^{[nb 4]}
`12h`	MBR	CHS, LBA	x86	Service FS	Compaq		Configuration partition (bootable FAT with MS-DOS^[4]^[5]^[7]); Recovery partition (bootable FAT32 with Windows setup^[8])
	MBR		x86	Service	Gang of Nine	EISA machines	EISA configuration utility for the system^[4]^[5]
				Hibernation	Compaq	Compaq Contura	Hibernation partition^[7]
	MBR		x86	Service FS	NCR		Diagnostics and firmware partition (bootable FAT)^[7]
	MBR		x86	Service FS	Intel		Service partition (bootable FAT)^[7] (see `98h`)
				Service FS	IBM		Rescue and Recovery partition^[7]
`14h`				File system	AST	AST MS-DOS 3.x	Logical sectored FAT12 or FAT16^{[nb 3]} (see AST MBR)
			x86, 68000, 8080/Z80	Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT16 (corresponds with `04h`)^{[nb 4]}
		LBA	x86	File system	Lasse Krogh Thygesen	Maverick OS	Omega file system^[9]
`15h`			No, AAP	Hidden container	IBM	OS/2 Boot Manager	Hidden extended partition with CHS addressing (corresponds with `05h`)^{[nb 4]}
`15h`		LBA	No	Swap	Lasse Krogh Thygesen	Maverick OS	Swap^[9]
`16h`			x86, 68000, 8080/Z80	Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT16B (corresponds with `06h`)^{[nb 4]}
`17h`				Hidden FS	IBM	OS/2 Boot Manager	Hidden IFS (corresponds with `07h`)^{[nb 4]}
							Hidden HPFS (corresponds with `07h`)^{[nb 4]}
							Hidden NTFS (corresponds with `07h`)^{[nb 4]}
							Hidden exFAT (corresponds with `07h`)^{[nb 4]}
`18h`			No	Hibernation	AST	AST Windows	AST Zero Volt Suspend or SmartSleep partition
`19h`					Willow Schlanger	Willowtech Photon coS	Willowtech Photon coS (see `20h`)
`1Bh`				Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT32 (corresponds with `0Bh`)^{[nb 4]}
`1Ch`				Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT32 with LBA (corresponds with `0Ch`)^{[nb 4]}
`1Ch`				Service FS	ASUS	ASUS eRecovery	ASUS recovery partition (Hidden FAT32 with LBA, see `0Ch`)^[10]
`1Eh`				Hidden FS	IBM	OS/2 Boot Manager	Hidden FAT16 with LBA (corresponds with `0Eh`)^{[nb 4]}
`1Fh`	MBR, EBR	LBA		Hidden container	IBM	OS/2 Boot Manager	Hidden extended partition with LBA addressing (corresponds with `0Fh`)^{[nb 4]}
`20h`			?	File system	Microsoft	Windows Mobile	Windows Mobile update XIP
`20h`				File system	Willow Schlanger		Willowsoft Overture File System (OFS1) (see `19h`)
`21h`	MBR			?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`21h`				File system	Dave Poirier	Oxygen	FSo2 (Oxygen File System) (see `22h`)
`22h`				Container	Dave Poirier	Oxygen	Oxygen Extended Partition Table (see `21h`)
`23h`			Yes	File system	Microsoft	Windows Mobile	Windows Mobile boot XIP
`24h`	MBR	CHS	x86	File system	NEC	NEC MS-DOS 3.30	Logical sectored FAT12 or FAT16^[11]^{[nb 3]} (see NEC MBR)
`27h`				Service FS	Microsoft	Windows	Windows Recovery Environment (RE) partition (hidden NTFS partition type `07h`)^[12]
	MBR	LBA	Yes	Service FS	Acer	D2D eRecovery	Rescue partition (Hidden NTFS labeled "PQService", corresponds to `07h`)
			Yes	Service	MikroTik	Linux (RouterBOARD 500)	RooterBOOT kernel partition (contains a raw ELF Linux kernel, no file system)
`2Ah`				File system	Kurt Skauen	AtheOS	AtheOS file system (AthFS, AFS) (an extension of BFS, see `2Bh` and `EBh`)
`2Ah`	MBR, EBR	LBA	x86	File system			Reserved (see `CAh`)
`2Bh`				File system	Kristian van der Vliet	SyllableOS	SyllableSecure (SylStor), a variant of AthFS (an extension of BFS, see `2Ah` and `EBh`)
`30h`	MBR	CHS	x86	File system	Digital Research	Personal CP/M-86	Found in some OEM Siemens systems instead of `DBh`.^[13] Filesystem parameters are in the following sector (LBA 1), not the partition itself.
`31h`					Microsoft, IBM		Reserved
`32h`	MBR	Yes	Container		Alien Internet Services	nOS	Used as a container for nOS partitions (kernel and driver caching, user file storage, swap, etc.)^[14] ^[15] ^[16]
`33h`					Microsoft, IBM		Reserved
`34h`					Microsoft, IBM		Reserved
`35h`	MBR, EBR	CHS, LBA	No	File system	IBM	OS/2 Warp Server / eComStation	JFS (OS/2 implementation of AIX Journaling File system)
`36h`					Microsoft, IBM		Reserved
`38h`				File system	Timothy Williams	THEOS	THEOS version 3.2, 2 GB partition
`39h`				Container	Bell Labs	Plan 9	Plan 9 edition 3 partition (sub-partitions described in second sector of partition)
`39h`				File system	Timothy Williams	THEOS	THEOS version 4 spanned partition
`3Ah`				File system	Timothy Williams	THEOS	THEOS version 4, 4 GB partition
`3Bh`				Container	Timothy Williams	THEOS	THEOS version 4 extended partition
`3Ch`				Service	PowerQuest	PartitionMagic	PqRP (PartitionMagic or DriveImage in progress)^[17]
`3Dh`				Hidden FS	PowerQuest	PartitionMagic	Hidden NetWare
`40h`					PICK Systems	PICK	PICK R83
`40h`					VenturCom	Venix	Venix 80286
`41h`			Yes			Personal RISC	Personal RISC Boot
					Linux	Linux	Old Linux/Minix (disk shared with DR DOS 6.0) (corresponds with `81h`)
			PowerPC		PowerPC	PowerPC	PPC PReP (Power PC Reference Platform) Boot
`42h`				Secured FS	Peter Gutmann	SFS	Secure File system (SFS)
			No		Linux	Linux	Old Linux swap (disk shared with DR DOS 6.0) (corresponds with `82h`)
				Container	Microsoft	Windows 2000, XP, etc.	Dynamic extended partition marker^[4]^[5]
`43h`			Yes	File system	Linux	Linux	Old Linux native (disk shared with DR DOS 6.0) (corresponds with `83h`)
`44h`					Wildfile	GoBack	Norton GoBack, WildFile GoBack, Adaptec GoBack, Roxio GoBack
`45h`		CHS			Priam		Priam (see also `5Ch`)
	MBR	CHS	Yes			Boot-US	Boot-US boot manager (1 cylinder)
					Jochen Liedtke, GMD	EUMEL/ELAN	EUMEL/ELAN (L2)
`46h`					Jochen Liedtke, GMD	EUMEL/ELAN	EUMEL/ELAN (L2)
`47h`					Jochen Liedtke, GMD	EUMEL/ELAN	EUMEL/ELAN (L2)
`48h`					Jochen Liedtke, GMD	EUMEL/ELAN	EUMEL/ELAN (L2), ERGOS L3
`4Ah`	MBR		Yes		Nick Roberts	AdaOS	Aquila (see `7Fh`)
`4Ah`	MBR, EBR	CHS, LBA	No	File system	Mark Aitchison	ALFS/THIN	ALFS/THIN advanced lightweight file system for DOS
`4Ch`					ETH Zürich	ETH Oberon	Aos (A2) file system (76)
`4Dh`					Quantum Software Systems	QNX 4.x, Neutrino	Primary QNX POSIX volume on disk (77)^[6]^{[nb 2]}
`4Eh`					Quantum Software Systems	QNX 4.x, Neutrino	Secondary QNX POSIX volume on disk (78)^[6]^{[nb 2]}
`4Fh`					Quantum Software Systems	QNX 4.x, Neutrino	Tertiary QNX POSIX volume on disk (79)^[6]^{[nb 2]}
`4Fh`			Yes		ETH Zürich	ETH Oberon	Boot / native file system (79)
`50h`					ETH Zürich	ETH Oberon	Alternative native file system (80)
			No		Ontrack	Disk Manager 4	Read-only partition (old)
						LynxOS	Lynx RTOS
						Novell
`51h`					Novell
`51h`			No		Ontrack	Disk Manager 4-6	Read-write partition (Aux 1)
`52h`	MBR	CHS		File system	Digital Research	CP/M-80	CP/M-80
`52h`					Microport	System V/AT, V/386
`53h`					Ontrack	Disk Manager 6	Auxiliary 3 (WO)
`54h`					Ontrack	Disk Manager 6	Dynamic Drive Overlay (DDO)
`55h`					MicroHouse / StorageSoft	EZ-Drive	EZ-Drive, Maxtor, MaxBlast, or DriveGuide INT 13h redirector volume
`56h`					AT&T	AT&T MS-DOS 3.x	Logical sectored FAT12 or FAT16^{[nb 3]}
					MicroHouse / StorageSoft	EZ-Drive	Disk Manager partition converted to EZ-BIOS
					Golden Bow	VFeature	VFeature partitioned volume
`57h`					MicroHouse / StorageSoft	DrivePro
`57h`					Novell		VNDI partition
`59h`	MBR, EBR	CHS, LBA	Yes	File system	Yocto	yocOS	yocFS
`5Ch`		CHS		Container	Priam	EDISK	Priam EDisk Partitioned Volume (see also `45h`)
`61h`	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden FAT12 (corresponds to `E1h`)^{[nb 6]}
`63h`		CHS		File system	AT&T	SCO Unix, ISC, UnixWare, AT&T System V/386, ix, MtXinu BSD 4.3 on Mach
		CHS	Yes	File system	Mach and BSD^[18]^[19]	GNU/Hurd	Old GNU/Hurd with UFS^[18] support (corresponds with `83h`)
	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden read-only FAT12 (corresponds to `E3h`)^{[nb 6]}
`64h`				?	Storage Dimensions	SpeedStor	Hidden FAT16 (corresponds to `E4h`)^{[nb 6]}
				File system	Novell	NetWare	NetWare File System 286/2^[3]
				Secured FS	Solomon		PC-ARMOUR
`65h`				File system	Novell	NetWare	NetWare File System 386
`66h`				?	Novell	NetWare	Storage Management Services (SMS)
`66h`	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden read-only FAT16 (corresponds to `E6h`)^{[nb 6]}
`67h`				?	Novell	NetWare	Wolf Mountain cluster
`68h`				?	Novell	NetWare
`69h`				?	Novell	NetWare 5
`69h`				?	Novell	NetWare	Novell Storage Services (NSS)
`6Ch`	MBR	CHS, LBA	x86	Container	DragonFly BSD	BSD	BSD slice (DragonFly BSD)^[20]
`70h`				Service		DiskSecure	DiskSecure multiboot
`71h`					Microsoft, IBM		Reserved
`72h`	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	APTI alternative FAT12 (CHS, SFN) (corresponds with `01h`)
`72h`				File system	Nordier	Unix V7/x86	V7/x86
`73h`					Microsoft, IBM		Reserved
`74h`	MBR	CHS		Hidden FS	Storage Dimensions	SpeedStor	Hidden FAT16B (corresponds to `F4h`)^{[nb 6]}
`75h`				File system	IBM	PC/IX	^[3]
`76h`					Storage Dimensions	SpeedStor	Hidden read-only FAT16B (corresponds to `F6h`)^{[nb 6]}
`77h`				File system	Novell		VNDI, M2FS, M2CS
`78h`			Yes	File system	Geurt Vos		XOSL bootloader file system
`79h`	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	APTI alternative FAT16 (CHS, SFN) (corresponds with `04h`)
`7Ah`	MBR, EBR	LBA	x86	Policy FS		APTI conformant systems	APTI alternative FAT16 (LBA, SFN) (corresponds with `0Eh`)
`7Bh`	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	APTI alternative FAT16B (CHS, SFN) (corresponds with `06h`)
`7Ch`	MBR, EBR	LBA	x86	Policy FS		APTI conformant systems	APTI alternative FAT32 (LBA, SFN) (corresponds with `0Ch`)
`7Dh`	MBR, EBR	CHS	x86	Policy FS		APTI conformant systems	APTI alternative FAT32 (CHS, SFN) (corresponds with `0Bh`)
`7Eh`	MBR, EBR		No	Cache	Romex Software	PrimoCache	Level 2 cache
`7Fh`	MBR, EBR				Alternative OS Development Partition Standard		Reserved for individual or local use and temporary or experimental projects^[2]
`80h`				File system	Andrew Tanenbaum	Minix 1.1-1.4a	MINIX file system (old)
`81h`				File system	Andrew Tanenbaum	Minix 1.4b+	MINIX file system (corresponds with `41h`)
`82h`			No	Swap	Linux	Linux	Linux swap space (corresponds with `42h`)
			No	Swap	Linux	GNU/Hurd	GNU/Hurd (Hurd uses the same Linux swap file system)
			x86	Container	Sun Microsystems		Solaris x86 (for Sun disklabels up to 2005) (see `BFh`)
`83h`			Yes	File system	Linux	Linux	Any native Linux file system (see `93h`, corresponds with `43h`)
`83h`			Yes	File system	Linux	GNU/Hurd	GNU/Hurd (Hurd and GRUB use the same Linux ext2 file system to run and it no longer supports UFS^[18] file system, corresponds with `63h`)
`84h`			No	Hibernation	Microsoft	?	APM hibernation (suspend to disk, S2D)^[5]^[7]^[21]
				Hidden FS	IBM	OS/2	Hidden C: (FAT16)(corresponds to either 04h or 06h)
				Hibernation	Intel	Rapid Start technology	Rapid Start hibernation data^[22] (possibly iFFS; possibly used for Intel SRT SSD cache as well)
`85h`			No, AAP	Container	Linux	Linux	Linux extended^[23] (corresponds with `05h`)
`86h`				File system	Microsoft	Windows NT 4 Server	Fault-tolerant FAT16B mirrored volume set (see `B6h` and `C6h`, corresponds with `06h`)^[4]^[5]
`86h`				Service	Linux	Linux	Linux RAID superblock with auto-detect (old) (see `FDh`)^{[citation needed]}
`87h`				File system	Microsoft	Windows NT 4 Server	Fault-tolerant HPFS/NTFS mirrored volume set (see `B7h` and `C7h`, corresponds with `07h`)^[4]^[5]
`88h`				Service	Linux	Linux	Linux plaintext partition table
`8Ah`				Service	Martin Kiewitz	AirBoot	AirBoot is a track0 Boot Manager with on-the-fly partition detection^[24]
`8Bh`				File system	Microsoft	Windows NT 4 Server	Legacy fault-tolerant FAT32 mirrored volume set (see `BBh` and `CBh`, corresponds with `0Bh`)^[4]
`8Ch`				File system	Microsoft	Windows NT 4 Server	Legacy fault-tolerant FAT32 mirrored volume set (see `BCh` and `CCh`, corresponds with `0Ch`)^[4]
`8Dh`	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	Hidden FS	FreeDOS	Free FDISK	Hidden FAT12 (corresponds with `01h`)^{[nb 7]}
`8Eh`				Container	Linux	Linux	Linux LVM since 1999 (see `FEh`)^{[citation needed]}
`90h`	MBR, EBR	CHS, LBA	x86, 68000, 8080/Z80	Hidden FS	FreeDOS	Free FDISK	Hidden FAT16 (corresponds with `04h`)^{[nb 7]}
`91h`	MBR, EBR	CHS, LBA	No, AAP	Hidden container	FreeDOS	Free FDISK	Hidden extended partition with CHS addressing (corresponds with `05h`)^{[nb 7]}
`92h`	MBR, EBR	CHS, LBA	x86	Hidden FS	FreeDOS	Free FDISK	Hidden FAT16B (corresponds with `06h`)^{[nb 7]}
`93h`				File system	Andrew S. Tanenbaum	Amoeba	Amoeba native file system
`93h`				Hidden FS		Linux	Hidden Linux file system (see `83h`)
`94h`				Service	Andrew S. Tanenbaum	Amoeba	Amoeba bad block table
`95h`				File system	MIT	EXOPC	EXOPC native
`96h`				File system	?	CHRP	ISO-9660 file system^[25]
`97h`	MBR, EBR	CHS, LBA	x86	Hidden FS	FreeDOS	Free FDISK	Hidden FAT32 (corresponds with `0Bh`)^{[nb 7]}
`98h`	MBR, EBR	LBA	x86	Hidden FS	FreeDOS	Free FDISK	Hidden FAT32 (corresponds with `0Ch`)^{[nb 7]}
	MBR	CHS, LBA	x86	Service FS	Datalight	ROM-DOS	Service partition (bootable FAT) ROM-DOS SuperBoot (see `12h`)
	MBR	CHS, LBA	x86	Service FS	Intel	?	Service partition (bootable FAT)^[7] (see `12h`)
`99h`				File system	?	?	Early Unix^{[citation needed]}
`9Ah`	MBR, EBR	LBA	x86	Hidden FS	FreeDOS	Free FDISK	Hidden FAT16 (corresponds with `0Eh`)^{[nb 7]}
`9Bh`	MBR, EBR	LBA	No, AAP	Hidden container	FreeDOS	Free FDISK	Hidden extended partition with LBA (corresponds with `0Fh`)^{[nb 7]}
`9Eh`				File system	Andy Valencia	VSTa	^{[citation needed]}
`9Eh`				File system	Andy Valencia	ForthOS	ForthOS (eForth port)^[26]
`9Fh`				?	?	BSD/OS 3.0+, BSDI	(see `B7h` and `B8h`)
`A0h`	MBR			Service FS	Hewlett-Packard	?	Diagnostic partition for HP laptops^[7]
`A0h`				Hibernation	Phoenix, IBM, Toshiba, Sony	?	Hibernate partition^[5]
`A1h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`A1h`				Hibernation	Phoenix, NEC	?	Hibernate partition
`A2h`	MBR	CHS, LBA	ARM	Image	Altera	Cyclone V	Hard Processor System (HPS) ARM preloader^[27]
`A3h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`A4h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`A5h`	MBR			Container	FreeBSD	BSD	BSD slice (BSD/386, 386BSD, NetBSD (before 1998-02-19), FreeBSD)^[28]
`A6h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`A6h`	MBR			Container	OpenBSD	OpenBSD	OpenBSD slice
`A7h`			386	File system	NeXT	NeXTSTEP	^{[citation needed]}
`A8h`				File system	Apple	Darwin, Mac OS X	Apple Darwin, Mac OS X UFS^{[nb 8]}
`A9h`	MBR			Container	NetBSD	NetBSD	NetBSD slice^[29]
`AAh`	MBR	CHS	?	File system	Olivetti	MS-DOS	Olivetti MS-DOS FAT12 (1.44 MB) (corresponds with `06h`)
`ABh`			Yes	Service	Apple	Darwin, Mac OS X	Apple Darwin, Mac OS X boot^{[nb 8]}
`ABh`				File system	Stanislav Karchebny	GO! OS	GO!
`ACh`			Yes	Service	Apple	Darwin, Mac OS X	Apple RAID, Mac OS X RAID^{[nb 8]}
`ADh`				File system	Ben Avison, Acorn	RISC OS	ADFS / FileCore format
`AEh`			x86	File system	Frank Barrus	ShagOS	ShagOS file system
`AFh`			?	File system	Apple	Mac OS X	HFS and HFS+^{[nb 8]}
`AFh`			No	Swap	Frank Barrus	ShagOS	ShagOS swap
`B0h`	MBR	CHS, LBA	x86	Blocker	Star-Tools	Boot-Star	Boot-Star dummy partition
`B1h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`B1h`				File system	QNX Software Systems	QNX 6.x	QNX Neutrino power-safe file system^{[nb 2]}
`B2h`				File system	QNX Software Systems	QNX 6.x	QNX Neutrino power-safe file system^{[nb 2]}
`B3h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`B3h`				File system	QNX Software Systems	QNX 6.x	QNX Neutrino power-safe file system^{[nb 2]}
`B4h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`B6h`				?	Hewlett-Packard	HP Volume Expansion	^{[nb 5]}
`B6h`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT16B mirrored master volume (see `C6h` and `86h`, corresponds with `06h`)
`B7h`				File system		BSDI (before 3.0)	BSDI native file system / swap (see `B8h` and `9Fh`)
`B7h`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant HPFS/NTFS mirrored master volume (see `C7h` and `87h`, corresponds with `07h`)
`B8h`				File system		BSDI (before 3.0)	BSDI swap / native file system (see `B7h` and `9Fh`)
`BBh`				Hidden FS	PhysTechSoft, Acronis, SWsoft	BootWizard, OS Selector	PTS BootWizard 4 / OS Selector 5 for hidden partitions other than `01h`, `04h`, `06h`, `07h`, `0Bh`, `0Ch`, `0Eh` and unformatted partitions
	MBR			Service FS	Acronis	Acronis True Image	OEM Secure Zone (corresponds to `BCh`)
	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored master volume (see `CBh` and `8Bh`, corresponds with `0Bh`)
`BCh`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored master volume (see `CCh` and `8Ch`, corresponds with `0Ch`)
	MBR	LBA		Service FS	Acronis	Acronis True Image	Acronis Secure Zone
	MBR, EBR			Service FS	Paragon Software Group	Backup Capsule	Backup Capsule^{[citation needed]}
`BDh`				File system	?	BonnyDOS/286	^{[citation needed]}
`BEh`			Yes	File system	Sun Microsystems	Solaris 8	Solaris 8 boot
`BFh`			x86	Container	Sun Microsystems	Solaris	Solaris x86 (for Sun disklabels, since 2005) (see `82h`)
`C0h`	MBR	CHS, LBA	x86	Secured container	Novell, IMS	DR-DOS, Multiuser DOS, REAL/32	Secured FAT partition (smaller than 32 MB)^{[nb 9]}^{[nb 10]}
`C1h`	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	Secured FAT12 (corresponds with `01h`)^{[nb 9]}
`C2h`			Yes	Hidden FS	BlueSky Innovations	Power Boot	Hidden Linux native file system
`C3h`			No	Hidden swap	BlueSky Innovations	Power Boot	Hidden Linux swap
`C4h`	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	Secured FAT16 (corresponds with `04h`)^{[nb 9]}
`C5h`	MBR, EBR	CHS, LBA	No, AAP	Secured container	Digital Research	DR DOS 6.0+	Secured extended partition with CHS addressing (corresponds with `05h`)^{[nb 9]}
`C6h`	MBR, EBR	CHS, LBA	x86	Secured FS	Digital Research	DR DOS 6.0+	Secured FAT16B (corresponds with `06h`)^{[nb 9]}
`C6h`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT16B mirrored slave volume (see `B6h` and `86h`, corresponds with `06h`)
`C7h`	MBR		Yes	File system		Syrinx	Syrinx boot
`C7h`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant HPFS/NTFS mirrored slave volume (see `B7h` and `87h`, corresponds with `07h`)
`C8h`					?		Reserved for DR-DOS since 1997^{[citation needed]}
`C9h`					?		Reserved for DR-DOS since 1997^{[citation needed]}
`CAh`					?		Reserved for DR-DOS since 1997^{[citation needed]}
`CBh`	MBR, EBR	CHS, LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	Secured FAT32 (corresponds with `0Bh`)^{[nb 9]}
`CBh`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored slave volume (see `BBh` and `8Bh`, corresponds with `0Bh`)
`CCh`	MBR, EBR	LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	Secured FAT32 (corresponds with `0Ch`)^{[nb 9]}
`CCh`	EBR			File system	Microsoft	Windows NT 4 Server	Corrupted fault-tolerant FAT32 mirrored slave volume (see `BCh` and `8Ch`, corresponds with `0Ch`)
`CDh`			No	Service	Convergent Technologies, Unisys	CTOS	Memory dump (see `DDh` and `DBh`)
`CDh`	MBR	LBA	x86	File system	openSUSE	Linux	openSUSE ISOHybrid ISO9660 partition (from openSUSE Leap "Live" x86 images) ^[30]
`CEh`	MBR, EBR	LBA	x86	Secured FS	Caldera	DR-DOS 7.0x	Secured FAT16B (corresponds with `0Eh`)^{[nb 9]}
`CFh`	MBR, EBR	LBA	No, AAP	Secured container	Caldera	DR-DOS 7.0x	Secured extended partition with LBA (corresponds with `0Fh`)^{[nb 9]}
`D0h`	MBR	CHS, LBA	386	Secured container	Novell, IMS	Multiuser DOS, REAL/32	Secured FAT partition (larger than 32 MB)^{[nb 11]}^{[nb 10]}
`D1h`	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	Secured FAT12 (corresponds with `01h`)^{[nb 11]}
`D4h`	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	Secured FAT16 (corresponds with `04h`)^{[nb 11]}
`D5h`	MBR, EBR	CHS	No	Secured container	Novell	Multiuser DOS	Secured extended partition with CHS addressing (corresponds with `05h`)^{[nb 11]}
`D6h`	MBR, EBR	CHS	386	Secured FS	Novell	Multiuser DOS	Secured FAT16B (corresponds with `06h`)^{[nb 11]}
`D8h`	MBR	CHS		File system	Digital Research	CP/M-86	CP/M-86 (see `DBh`)^{[citation needed]}
`DAh`			No	Service	John Hardin		Non-file system data
`DAh`				Secured FS	DataPower	Powercopy Backup	Shielded disk
`DBh`	MBR	CHS	x86	File system	Digital Research	CP/M-86, Concurrent CP/M-86, Concurrent DOS	^[13] (see `D8h`)^[3]
				?	Convergent Technologies, Unisys	CTOS	? (see `CDh` and `DDh`)^{[citation needed]}
			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`)
`DDh`			No	Service	Convergent Technologies, Unisys	CTOS	Hidden memory dump (see `CDh` and `DBh`)
`DEh`	MBR	CHS, LBA	x86	Hidden FS	Dell		FAT16 utility/diagnostic partition^[5]^[7]^[31]
`DFh`				?	Data General	DG/UX	DG/UX virtual disk manager^{[citation needed]}
	MBR			Blocker	TeraByte Unlimited	BootIt	EMBRM^{[citation needed]}
				?	?	Aviion	^{[citation needed]}
`E0h`				File system	STMicroelectronics		ST AVFS
`E1h`	MBR	CHS		File system	Storage Dimensions	SpeedStor	FAT12 (≤16 MB) (corresponds to `01h`)^{[nb 6]}
`E3h`				File system	Storage Dimensions	SpeedStor	Read-only FAT12 (corresponds to `E1h`)^{[nb 6]}
`E4h`	MBR	CHS		File system	Storage Dimensions	SpeedStor	FAT16 (≤32 MB) (corresponds to `04h`)^{[nb 6]}
`E5h`	MBR	CHS	x86	File system	Tandy	Tandy MS-DOS	Logical sectored FAT12 or FAT16^{[nb 3]}
`E6h`				File System	Storage Dimensions	SpeedStor	Read-only FAT16 (corresponds to `E4h`)^{[nb 6]}
`E8h`	MBR, EBR	CHS, LBA	No	Service	Linux	LUKS	Linux Unified Key Setup^[32]
`EBh`			386	File system	Be Inc.	BeOS, Haiku	BFS (see `2Ah` and `2Bh`)
`ECh`				File system	Robert Szeleney	SkyOS	SkyFS
`EDh`	MBR, EBR	CHS, LBA	x86	Service	Matthias R. Paul	Sprytix	EDC loader
`EDh`	MBR	CHS, LBA	x86		Hewlett-Packard	EFI	Was proposed for GPT hybrid MBR^{[nb 12]}
`EEh`	MBR		No	Blocker	Microsoft	EFI	GPT protective MBR^[1]^[5] (see `EFh`)
`EFh`	MBR			Service FS	Intel	EFI	EFI system partition. Can be a FAT12, FAT16, FAT32 (or other) file system^[5] (see `EEh`)
`F0h`		CHS		Service		Linux	PA-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	Logical sectored FAT12 or FAT16^{[nb 3]} secondary partition
`F4h`	MBR	CHS		File system	Storage Dimensions	SpeedStor	FAT16B (corresponds to `06h`)^{[nb 6]}
`F4h`				File system	?	Prologue	Single volume partition for NGF or TwinFS
`F5h`				Container	?	Prologue	MD0-MD9 multi volume partition for NGF or TwinFS
`F6h`	MBR			File system	Storage Dimensions	SpeedStor	Read-only FAT16B (corresponds to `F4h`)^{[nb 6]}
`F7h`				File system	Natalia Portillo	O.S.G.	EFAT
`F7h`				File system	DDRdrive	X1	Solid State file system
`F8h`	MBR			Service	Arm	Arm EBBR 1.0 ^[33]	Protective partition for the area containing system firmware
`F9h`				Cache	ALC Press	Linux	pCache ext2/ext3 persistent cache^[34]
`FBh`			No	File system	VMware	VMware ESX	VMware VMFS file system partition
`FCh`			No	Swap	VMware	VMware ESX	VMware swap / VMKCORE kernel dump partition
`FDh`				Service	Linux	Linux	Linux RAID superblock with auto-detect (see `86h`)
`FEh`				Service	IBM	PS/2	PS/2 IML partition^[5]^[7]
	MBR	CHS, LBA	x86	Service FS	IBM	PS/2	PS/2 recovery partition (FAT12 reference disk floppy image), (corresponds with `01h` if activated, all other partitions `+10h` then)^[5]
				Service	Linux	Linux	Old Linux LVM (see `8Eh`)
`FFh`	MBR	CHS	No	Service	Microsoft	XENIX	XENIX bad block table (see `02h` and `03h`)^[3]

Notes

[N 1]
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 and 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 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.
[N 2]
QNX partition IDs 07h, 08h, 09h, 4Dh (77), 4Eh (78), 4Fh (79), as well as B1h (177), B2h (178) and B3h (179).
[N 3]
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.
[N 4]
Used by OS/2 Boot Manager: 0Ah, 11h, 14h, 15h, 16h, 17h, 1Bh, 1Ch, 1Eh, 1Fh.
[N 5]
HP Volume Expansion is a variant of SpeedStor and uses partition IDs 21h, A1h, A3h, A4h, A6h, B1h, B3h, B4h, and B6h.
[N 6]
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, E4h and F4h which can be marked read-only (becoming E3h, E6h, F6h), hidden (61h, 64h, 74h) or hidden read-only (63h, 66h, 76h).
[N 7]
Used by Free FDISK of FreeDOS: 8Dh, 90h, 91h, 92h, 97h, 98h, 9Ah, 9Bh.
[N 8]
Apple Mac OS X uses partition IDs A8h, ABh, ACh, and AFh.
[N 9]
Versions of DR DOS 6.0 and higher use several of these partition IDs for secured FAT partitions with single-user security: C0h, C1h, C4h, C5h, C6h, CBh, CCh, CEh, CFh.
[N 10]
Versions of IMS REAL/32 use partition IDs C0h and D0h for multi-user security.
[N 11]
Versions of Multiuser DOS use these partition IDs for secured FAT partitions with multi-user security: D0h, D1h, D4h, D5h, D6h.
[N 12]
Was suggested in now-superseded T13 EDD 4 proposal e09127r1 Archived 2017-08-19 at the Wayback Machine (2009). The successor e09127r3 Archived 2018-05-01 at the Wayback Machine (2010) now recommends to use a normal partition type (the one that a legacy OS would see) instead of this special value.

References

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Overview

Local or Experimental Use

List of partition IDs

See also

Notes

References

Further reading

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