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.).
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.
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]
This is a list of known master boot record partition types on IBM PC compatible computers:
| 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] | |||
| 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] |
| 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] | ||
| 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] | |||
| 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 | ||
| File system | Willow Schlanger | Willowsoft Overture File System (OFS1) (see 19h ) | |||||
21h | MBR | ? | Hewlett-Packard | HP Volume Expansion | [nb 5] | ||
| 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 ) | |||
| 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) | |||
| 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 | ||||
| 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 ) | ||
| 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] | ||||
| 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 | ||||||
| No | Ontrack | Disk Manager 4-6 | Read-write partition (Aux 1) | ||||
52h | MBR | CHS | File system | Digital Research | CP/M-80 | CP/M-80 | |
| 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 | |||||
| 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) | |||
| 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 | ||||
| ? | 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 ) | |
| 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 ) | ||
| 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] | |||
| 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 | |||
| 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 ] | |||
| 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] | ||
| Hibernation | Phoenix, IBM, Toshiba, Sony | ? | Hibernate partition [5] | ||||
A1h | ? | Hewlett-Packard | HP Volume Expansion | [nb 5] | |||
| 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] | |||
| 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] | ||
| 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] | ||
| 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] | |||
| 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] | |||
| 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] | |||
| 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 ) | ||||
| 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] |
| 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 | ||
| 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] |
| 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] |
| 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 ) | ||
| 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 | |||
| 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 |
| 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] | |
| 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 | |||
| 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] |
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. 07h , 08h , 09h , 4Dh (77), 4Eh (78), 4Fh (79), as well as B1h (177), B2h (178) and B3h (179).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. 0Ah , 11h , 14h , 15h , 16h , 17h , 1Bh , 1Ch , 1Eh , 1Fh . 21h , A1h , A3h , A4h , A6h , B1h , B3h , B4h , and B6h . 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 ). 8Dh , 90h , 91h , 92h , 97h , 98h , 9Ah , 9Bh . A8h , ABh , ACh , and AFh . C0h , C1h , C4h , C5h , C6h , CBh , CCh , CEh , CFh . C0h and D0h for multi-user security. D0h , D1h , D4h , D5h , D6h .