Partition type - Wikipedia

# Partition type

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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 and/or to flag special access methods used to access these partitions (f.e. special CHS mappings, LBA access, logical mapped geometries, special driver access, hidden partitions, secured or encrypted file systems, etc.).

## Overview[edit]

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 conflictive double-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.

While not officially maintained,[1] new assignments should be coordinated, in particular any new 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]

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.

## List of partition IDs[edit]

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 | N/A | 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 65536 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 65536 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]
`10h` |  |  |  | ? | Unisys | OPUS | [citation needed]
`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)
`25h` |  |  | ? | File system | Microsoft | Windows Mobile | Windows Mobile IMGFS[citation needed]
`26h` |  |  |  |  | Microsoft, IBM |  | Reserved[citation needed]
`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`)
|  |  | File system |  | MirOS BSD | MirOS partition[citation needed]
|  | ? | Service |  | RooterBOOT | 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`)
`31h` |  |  |  |  | Microsoft, IBM |  | Reserved
`32h` |  |  |  | File system | Alien Internet Services | NOS | [citation needed]
`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)[13]
`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 partitionned volume
`57h` |  |  |  |  | MicroHouse / StorageSoft | DrivePro |
|  |  |  | Novell |  | VNDI partition
`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, GNU HURD |
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` |  |  |  | File system | Novell | NetWare | NetWare File System 386
|  |  | ? | 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
`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)[14]
`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`)
|  |  | ? | ? | ? | Mitac Advanced Disk Manager[citation needed]
`82h` |  |  | No | Swap | GNU/Linux | Linux | Linux swap space (corresponds with `42h`)
|  | x86 | Container | Sun Microsystems |  | Solaris x86 (for Sun disklabels up to 2005) (see `BFh`)
|  |  | ? | Prime Computer | PRIMOS | [citation needed]
`83h` |  |  | Yes | File system | GNU/Linux | Linux | Any native Linux file system (see `93h`, corresponds with `43h`)
`84h` |  |  | No | Hibernation | Microsoft | ? | APM hibernation (suspend to disk, S2D)[5][7][15]
|  |  | Hidden FS | IBM | OS/2 | Hidden C: (FAT16)(corresponds to either 04h or 06h)
|  |  | Hibernation | Intel | Rapid Start technology | Rapid Start hibernation data[16] (possibly iFFS; possibly used for Intel SRT SSD cache as well)
`85h` |  |  | No, AAP | Container | GNU/Linux | Linux | Linux extended[17] (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 | GNU/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 | GNU/Linux |  | Linux plaintext partition table
`8Ah` |  |  |  | Service | Martin Kiewitz | AiR-BOOT | Linux kernel image[citation needed]
`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 | GNU/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[citation needed]
`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)[18]
`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[19]
`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)[20]
`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[21]
`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`)
`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 | [22] (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][23]
`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[24]
`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 [25] | Protective partition for the area containing system firmware
`F9h` |  |  |  | Cache | ALC Press | Linux | pCache ext2/ext3 persistent cache[26]
`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 | GNU/Linux | Linux | Linux RAID superblock with auto-detect (see `86h`)
`FEh` |  |  |  | ? | Intel | LANstep | [citation needed]
|  |  | 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 | Microsoft | Windows NT | Disk Administration hidden partition[citation needed]
|  |  | Service | GNU/Linux | Linux | Old Linux LVM (see `8Eh`)
`FFh` | MBR | CHS | No | Service | Microsoft | XENIX | XENIX bad block table (see `02h` and `03h`)[3]

## See also[edit]

- PC partition types
- List of file systems
- Master Boot Record (MBR)
- Extended Boot Record (EBR)
- GUID Partition Table (GPT)
- Rigid Disk Block (RDB)

## Notes[edit]

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.
2. ^ Jump up to: a b c d e f g h i QNX partition IDs `07h`, `08h`, `09h`, `4Dh` (77), `4Eh` (78), `4Fh` (79), as well as `B1h` (177), `B2h` (178) and `B3h` (179).
3. ^ Jump up to: a b c d e f g 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.
4. ^ Jump up to: a b c d e f g h i j k l m Used by OS/2 Boot Manager: `0Ah`, `11h`, `14h`, `15h`, `16h`, `17h`, `1Bh`, `1Ch`, `1Eh`, `1Fh`.
5. ^ Jump up to: a b c d e f g h i HP Volume Expansion is a variant of SpeedStor and uses partition IDs `21h`, `A1h`, `A3h`, `A4h`, `A6h`, `B1h`, `B3h`, `B4h`, and `B6h`.
6. ^ Jump up to: a b c d e f g h i j k l 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`).
7. ^ Jump up to: a b c d e f g h Used by Free FDISK of FreeDOS: `8Dh`, `90h`, `91h`, `92h`, `97h`, `98h`, `9Ah`, `9Bh`.
8. ^ Jump up to: a b c d Apple Mac OS X uses partition IDs `A8h`, `ABh`, `ACh`, and `AFh`.
9. ^ Jump up to: a b c d e f g h i 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`.
10. ^ Jump up to: a b Versions of IMS REAL/32 use partition IDs `C0h` and `D0h` for multi-user security.
11. ^ Jump up to: a b c d e Versions of Multiuser DOS use these partition IDs for secured FAT partitions with multi-user security: `D0h`, `D1h`, `D4h`, `D5h`, `D6h`.
12. ^ Was 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.

## References[edit]

1. ^ Jump up to: a b c "Windows and GPT FAQ". Microsoft Developer Network. Microsoft. 2011-06-15. Retrieved 2011-07-24.
2. ^ Jump up to: a b Martineau, Stéphane (2002-08-11). "Partition Type ID (The RESULTs)". alt.os.development. Retrieved 2017-08-20.
3. ^ Jump up to: a b c d e f g h i j k Chappell, Geoff (January 1994). Schulman, Andrew; Pedersen, Amorette (eds.). DOS Internals. The Andrew Schulman Programming Series (1st printing, 1st ed.). Addison Wesley Publishing Company. ISBN 978-0-201-60835-9. ISBN 0-201-60835-9. (xxvi+738+iv pages, 3.5"-floppy [1][2]) Errata: [3][4][5]
4. ^ Jump up to: a b c d e f g h i j k l m n o p "Disk Concepts and Troubleshooting". Windows 2000 Server. Microsoft TechNet. Retrieved 2014-06-15.
5. ^ Jump up to: a b c d e f g h i j k l m n o p q r s t u "Troubleshooting Disks and File Systems". Microsoft TechNet. 2005-11-05. Retrieved 2014-06-15.
6. ^ Jump up to: a b c d e f QNX partition types
7. ^ Jump up to: a b c d e f g h i j "Virtual Disk Service (VDS advanced clean method)". Microsoft Developer Network. Microsoft. 2011-09-07. Retrieved 2011-09-14.
8. ^ "Compaq Setup partition". NotebookReview. Retrieved 2018-02-14.
9. ^ Jump up to: a b Thygesen, Lasse Krogh. "Maverick - The Operating System - File System Identifiers". www.maverick-os.dk. Retrieved 2017-08-19.
10. ^ "RE Creating Recovery Partition". ASUS Republic of Gamers. 2011-07-03.
11. ^ FYI - Installing DR DOS on NEC DOS 3.3 Partitions, Novell, 1993-01-05, FYI.M.1101, retrieved 2014-08-12
12. ^ "BIOS-Based Disk-Partition Configurations". Microsoft Developer Network. Microsoft. 2009-10-22. Retrieved 2011-07-24.
13. ^ "About PqRP". HowToFixComputers. 2003-07-26. Archived from the original on 2013-01-25. Retrieved 2011-10-14.
14. ^ DragonFly BSD commit 794d80a: Change legacy MBR partition type from 0xA5 to 0x6C
15. ^ "Drive Letters Assigned to Unsupported Partition Types". Microsoft Knowledge Base. Microsoft. 2007-02-27.
16. ^ Intel Rapid Start technology
17. ^ Andries Brouwer (2004). "Extended and logical partitions". Large Disk HOWTO. Retrieved 2011-07-19.
18. ^ "ForthOS setup instructions". Archived from the original on 2017-07-19. Retrieved 2017-12-31.
19. ^ "Altera Cyclone V Device Handbook - Hard Processor System Technical Reference Manual" (PDF) (cv_5v4 ed.). Altera Corporation. 2014-06-30. Archived from the original (PDF) on 2014-09-07. Retrieved 2014-09-07.
20. ^ "Disk Organization". FreeBSD Handbook. FreeBSD. 2011. Retrieved 2011-07-30.
21. ^ "Partitions". The NetBSD Guide. NetBSD. 2011. Retrieved 2011-12-30.
22. ^ Elliott, John C. (1998). "CP/M-86 disc formats". Seasip.info.
23. ^ "Create Multiple Partitions on a Device". Microsoft TechNet. Retrieved 2015-04-19.
24. ^ "/sbin/fdisk: add LUKS partition type code to fdisk". Debian. 2014-11-19. Archived from the original on 2019-05-03. Retrieved 2019-05-03.
25. ^ "Embedded Base Boot Requirements (EBBR) Specification Release v1.0". Arm Limited and Contributors. 2019-05-31. Retrieved 2020-06-18.
26. ^ Sawicki, Ed; May, David (2003-08-08). "Proposal for pCache". ALCPress.com. Accelerated Learning Center. Archived from the original on 2016-03-08. Retrieved 2016-11-29.

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