GUID Partition Table
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Short description: Computer disk partitioning standard
The layout of a disk with the GUID Partition Table. In this example, each logical block is 512 bytes in size and each entry has 128 bytes. The corresponding partition entries are assumed to be located in LBA 2–33. Negative LBA addresses indicate a position from the end of the volume, with −1 being the last addressable block.
The GUID Partition Table (GPT) is a standard for the layout of partition tables of a physical computer storage device, such as a hard disk drive or solid-state drive, using universally unique identifiers, which are also known as globally unique identifiers (GUIDs). Forming a part of the Unified Extensible Firmware Interface (UEFI) standard (Unified EFI Forum-proposed replacement for the PC BIOS), it is nevertheless also used for some BIOSs, because of the limitations of master boot record (MBR) partition tables, which use 32 bits for logical block addressing (LBA) of traditional 512-byte disk sectors.
All modern personal computer operating systems support GPT. Some, including macOS and Microsoft Windows on the x86 architecture, support booting from GPT partitions only on systems with EFI firmware, but FreeBSD and most Linux distributions can boot from GPT partitions on systems with either the BIOS or the EFI firmware interface.
History
The Master Boot Record (MBR) partitioning scheme, widely used since the early 1980s, imposed limitations for use of modern hardware. The available size for block addresses and related information is limited to 32 bits. For hard disks with 512‑byte sectors, the MBR partition table entries allow a maximum size of 2 TiB (2³² × 512‑bytes) or 2.20 TB (2.20 × 10¹² bytes).[1]
In the late 1990s, Intel developed a new partition table format as part of what eventually became the Unified Extensible Firmware Interface (UEFI). The GUID Partition Table is specified in chapter 5 of the UEFI 2.8 specification.[2] GPT uses 64 bits for logical block addresses, allowing a maximum disk size of 264 sectors. For disks with 512‑byte sectors, the maximum size is 8 ZiB (264 × 512‑bytes) or 9.44 ZB (9.44 × 10²¹ bytes).[1] For disks with 4,096‑byte sectors the maximum size is 64 ZiB (264 × 4,096‑bytes) or 75.6 ZB (75.6 × 10²¹ bytes).
In 2010, hard-disk manufacturers introduced drives with 4,096‑byte sectors (Advanced Format).[3] For compatibility with legacy hardware and software, those drives include an emulation technology (512e) that presents 512‑byte sectors to the entity accessing the hard drive, despite their underlying 4,096‑byte physical sectors.[4] Performance could be degraded on write operations, when the drive is forced to perform two read-modify-write operations to satisfy a single misaligned 4,096‑byte write operation.[5] Since April 2014, enterprise-class drives without emulation technology (4K native) have been available on the market.[6][7]
Readiness of the support for 4 KB logical sectors within operating systems differs among their types, vendors and versions.[8] For example, Microsoft Windows supports 4K native drives since Windows 8 and Windows Server 2012 (both released in 2012) in UEFI.[9]
Features
Like MBR, GPT uses logical block addressing (LBA) in place of the historical cylinder-head-sector (CHS) addressing. The protective MBR is stored at LBA 0, and the GPT header is in LBA 1, with a backup GPT header stored at the final LBA. The GPT header has a pointer to the partition table (Partition Entry Array), which is typically at LBA 2. Each entry on the partition table has a size of 128 bytes. The UEFI specification stipulates that a minimum of 16,384 bytes, regardless of sector size, are allocated for the Partition Entry Array.[10] Thus, on a disk with 512-byte sectors, at least 32 sectors are used for the Partition Entry Array, and the first usable block is at LBA 34 or higher, while on a 4,096-byte sectors disk, at least 4 sectors are used for the Partition Entry Array, and the first usable block is at LBA 6 or higher.
MBR variants
Protective MBR (LBA 0)
For limited backward compatibility, the space of the legacy Master Boot Record (MBR) is still reserved in the GPT specification, but it is now used in a way that prevents MBR-based disk utilities from misrecognizing and possibly overwriting GPT disks. This is referred to as a protective MBR.[11]
A single partition of type EEh, encompassing the entire GPT drive (where "entire" actually means as much of the drive as can be represented in an MBR), is indicated and identifies it as GPT. Operating systems and tools which cannot read GPT disks will generally recognize the disk as containing one partition of unknown type and no empty space, and will typically refuse to modify the disk unless the user explicitly requests and confirms the deletion of this partition. This minimizes accidental erasures.[11] Furthermore, GPT-aware OSes may check the protective MBR and if the enclosed partition type is not of type EEh or if there are multiple partitions defined on the target device, the OS may refuse to manipulate the partition table.[12]
If the actual size of the disk exceeds the maximum partition size representable using the legacy 32-bit LBA entries in the MBR partition table, the recorded size of this partition is clipped at the maximum, thereby ignoring the rest of the disk. This amounts to a maximum reported size of 2 TiB, assuming a disk with 512 bytes per sector (see 512e). It would result in 16 TiB with 4 KiB sectors (4Kn), but since many older operating systems and tools are hard coded for a sector size of 512 bytes or are limited to 32-bit calculations, exceeding the 2 TiB limit could cause compatibility problems.[11]
Hybrid MBR (LBA 0 + GPT)
In operating systems that support GPT-based boot through BIOS services rather than EFI, the first sector may also still be used to store the first stage of the bootloader code, but modified to recognize GPT partitions. The bootloader in the MBR must not assume a sector size of 512 bytes.[11]
Partition table header (LBA 1)
| Offset | Length | Contents |
|---|---|---|
| 0 (0x00) | 8 bytes | Signature ("EFI PART", 45h 46h 49h 20h 50h 41h 52h 54h or 0x5452415020494645ULL[lower-alpha 1] on little-endian machines) |
| 8 (0x08) | 4 bytes | Revision number of header - 1.0 (00h 00h 01h 00h) for UEFI 2.10 |
| 12 (0x0C) | 4 bytes | Header size in little endian (in bytes, usually 5Ch 00h 00h 00h or 92 bytes) |
| 16 (0x10) | 4 bytes | CRC32 of header (offset +0 to +0x5b) in little endian, with this field zeroed during calculation |
| 20 (0x14) | 4 bytes | Reserved; must be zero |
| 24 (0x18) | 8 bytes | Current LBA (location of this header copy) |
| 32 (0x20) | 8 bytes | Backup LBA (location of the other header copy) |
| 40 (0x28) | 8 bytes | First usable LBA for partitions (primary partition table last LBA + 1) |
| 48 (0x30) | 8 bytes | Last usable LBA (secondary partition table first LBA − 1) |
| 56 (0x38) | 16 bytes | Disk GUID in mixed endian[12] |
| 72 (0x48) | 8 bytes | Starting LBA of array of partition entries (usually 2 for compatibility) |
| 80 (0x50) | 4 bytes | Number of partition entries in array |
| 84 (0x54) | 4 bytes | Size of a single partition entry (usually 80h or 128) |
| 88 (0x58) | 4 bytes | CRC32 of partition entries array in little endian |
| 92 (0x5C) | * | Reserved; must be zeroes for the rest of the block (420 bytes for a sector size of 512 bytes; but can be more with larger sector sizes) |
The partition table header defines the usable blocks on the disk. It also defines the number and size of the partition entries that make up the partition table (offsets 80 and 84 in the table).[2]:119
Partition entries (LBA 2–33)
| Offset | Length | Contents |
|---|---|---|
| 0 (0x00) | 16 bytes | Partition type GUID (mixed endian[12]) |
| 16 (0x10) | 16 bytes | Unique partition GUID (mixed endian) |
| 32 (0x20) | 8 bytes | First LBA (little endian) |
| 40 (0x28) | 8 bytes | Last LBA (inclusive, usually odd) |
| 48 (0x30) | 8 bytes | Attribute flags (e.g. bit 60 denotes read-only) |
| 56 (0x38) | 72 bytes | Partition name (36 UTF-16LE code units) |
After the primary header and before the backup header, the Partition Entry Array describes partitions, using a minimum size of 128 bytes for each entry block.[13] The starting location of the array on disk, and the size of each entry, are given in the GPT header. The first 16 bytes of each entry designate the partition type's globally unique identifier (GUID). For example, the GUID for an EFI system partition is C12A7328-F81F-11D2-BA4B-00A0C93EC93B. The second 16 bytes are a GUID unique to the partition. Then follow the starting and ending 64 bit LBAs, partition attributes, and the 36 character (max.) Unicode partition name. As is the nature and purpose of GUIDs and as per RFC 4122, no central registry is needed to ensure the uniqueness of the GUID partition type designators.[14][2]:2200
The 64-bit partition table attributes are shared between 48-bit common attributes for all partition types, and 16-bit type-specific attributes:
| Bit | Content |
|---|---|
| 0 | Platform required (required by the computer to function properly, OEM partition for example, disk partitioning utilities must preserve the partition as is) |
| 1 | EFI firmware should ignore the content of the partition and not try to read from it |
| 2 | Legacy BIOS bootable (equivalent to active flag (typically bit 7 set) at offset +0h in partition entries of the MBR partition table)[15] |
| 3–47 | Reserved for future use |
| 48–63 | Defined and used by the individual partition type |
Microsoft defines the type-specific attributes for basic data partition as:[16][17]
| Bit | Content |
|---|---|
| 60 | Read-only |
| 61 | Shadow copy (of another partition) |
| 62 | Hidden |
| 63 | No drive letter (i.e. do not automount) |
Google defines the type-specific attributes for ChromeOS kernel as:[18]
| Bit | Content |
|---|---|
| 56 | Successful boot flag |
| 55–52 | Tries remaining |
| 51–48 | Priority (15: highest, 1: lowest, 0: not bootable) |
Operating-system support
UNIX and Unix-like systems
| OS family | Version or edition | Platform | Read and write support | Boot support | Note |
|---|---|---|---|---|---|
| FreeBSD | Since 7.0 | IA-32, x86-64, ARM | Yes | Yes | In a hybrid configuration, both GPT and MBR partition identifiers may be used. |
| Linux | Most of the x86 Linux distributions Fedora 8+ and Ubuntu 8.04+[19] |
IA-32, x86-64, ARM | Yes | Yes | Tools such as gdisk, GNU Parted,[20][21] util-linux v2.23+ fdisk,[22][23] SYSLINUX, GRUB 0.96 + patches and GRUB 2 have been GPT-enabled. Limited to 256 partitions per disk.[24] |
| macOS | Since 10.4.0 (some features since 10.4.6)[25] | IA-32, x86-64, PowerPC, Apple silicon | Yes | Yes | Only Intel and Apple silicon Macintosh computers can boot from GPT. |
| MidnightBSD | Since 0.4-CURRENT | IA-32, x86-64 | Yes | Requires CSM | In a hybrid configuration, both GPT and MBR partition identifiers may be used. |
| NetBSD | Since 6.0[26] | IA-32,[27] x86-64,[28] ARM | Yes | Yes | |
| OpenBSD | Since 5.9 | IA-32, x86-64, ARM | Yes | Yes | [29] |
| Solaris | Since Solaris 10 | IA-32, x86-64, SPARC | Yes | Yes | [30] |
| HP-UX | Since HP-UX 11.20 | IA-64 | Yes | Yes | [31] |
Windows: 32-bit versions
Windows 7 and earlier do not support UEFI on 32-bit platforms, and therefore do not allow booting from GPT partitions.[32]
| OS version | Release date | Platform | Read or write support | Boot support | Note |
|---|---|---|---|---|---|
| Windows 9x | 1995-08-24 | IA-32 | No[lower-alpha 2] | No | |
| Windows XP | 2001-10-25 | IA-32 | No | No | |
| Windows Server 2003 | 2003-04-24 | IA-32 | No | No | |
| Windows Server 2003 SP1 | 2005-03-30 | IA-32 | Yes | No | MBR takes precedence in hybrid configuration. |
| Windows Vista | 2006-07-22 | IA-32 | Yes | No | MBR takes precedence in hybrid configuration. |
| Windows Server 2008 | 2008-02-27 | IA-32 | Yes | No | MBR takes precedence in hybrid configuration. |
| Windows 7 | 2009-10-22 | IA-32 | Yes | No | MBR takes precedence in hybrid configuration. |
| Windows 8 | 2012-08-01 | IA-32 | Yes | Requires UEFI[33] | MBR takes precedence in hybrid configuration. |
| Windows 8.1 | 2013-08-27 | IA-32 | Yes | Requires UEFI[34] | MBR takes precedence in hybrid configuration. |
| Windows 10 | 2015-07-29 | IA-32 | Yes | Requires UEFI[35] | MBR takes precedence in hybrid configuration. |
Windows: 64-bit versions
Limited to 128 partitions per disk.[32]
| OS version | Release date | Platform | Read and write support | Boot support | Note |
|---|---|---|---|---|---|
| Windows XP 64-Bit Edition for Itanium systems, Version 2002 | 2001-10-25 | IA-64 | Yes | Yes | MBR takes precedence in hybrid configuration. |
| Windows XP 64-Bit Edition, Version 2003 | 2003-03-28 | IA-64 | Yes | Yes | MBR takes precedence in hybrid configuration. |
| Windows XP Professional x64 Edition Windows Server 2003 |
2005-04-25[36] | x64 | Yes | No | MBR takes precedence in hybrid configuration. |
| Windows Server 2003 | 2005-04-25 | IA-64 | Yes | Yes | MBR takes precedence in hybrid configuration. |
| Windows Vista | 2006-07-22 | x64 | Yes | Requires UEFI[lower-alpha 3] | MBR takes precedence in hybrid configuration. |
| Windows Server 2008 | 2008-02-27 | x64 | Yes | Requires UEFI | MBR takes precedence in hybrid configuration. |
| Windows Server 2008 | 2008-02-27 | IA-64 | Yes | Yes | MBR takes precedence in hybrid configuration. |
| Windows 7 | 2009-10-22 | x64 | Yes | Requires UEFI[lower-alpha 4] | MBR takes precedence in hybrid configuration. |
| Windows Server 2008 R2 | 2009-10-22 | IA-64 | Yes | Yes | MBR takes precedence in hybrid configuration. |
| Windows 8 Windows Server 2012 |
2012-08-01 | x64 | Yes | Requires UEFI[37] | MBR takes precedence in hybrid configuration. |
| Windows 8.1 | 2013-08-27 | x64 | Yes | Requires UEFI[38] | MBR takes precedence in hybrid configuration. |
| Windows 10 | 2015-07-29 | x64 | Yes | Requires UEFI[39] | MBR takes precedence in hybrid configuration. |
| Windows Server 2016 | 2016-10-12 | x64 | Yes | Requires UEFI | MBR takes precedence in hybrid configuration. |
| Windows Server 2019 | 2018-10-02 | x64 | Yes | Requires UEFI | MBR takes precedence in hybrid configuration. |
| Windows Server 2022 | 2021-08-18[40] | x64 | Yes | Requires UEFI | MBR takes precedence in hybrid configuration. |
| Windows 11 | 2021-10-05 | x64, ARM64 | Yes | Yes | UEFI is a system requirement for Windows 11. |
Partition type GUIDs
"Partition type GUID" means that each partition type is strictly identified by a GUID number unique to that type, and therefore partitions of the same type will all have the same "partition type GUID". Each partition also has a "partition unique GUID" as a separate entry, which as the name implies is a unique id for each partition.
| Operating system | Partition type | Globally unique identifier (GUID)[lower-alpha 5] |
|---|---|---|
| N/A | Unused entry | 00000000-0000-0000-0000-000000000000 |
| MBR partition scheme | 024DEE41-33E7-11D3-9D69-0008C781F39F | |
| EFI System partition | C12A7328-F81F-11D2-BA4B-00A0C93EC93B | |
| BIOS boot partition[lower-alpha 6] | 21686148-6449-6E6F-744E-656564454649 | |
| Intel Fast Flash (iFFS) partition (for Intel Rapid Start technology)[41][42] | D3BFE2DE-3DAF-11DF-BA40-E3A556D89593 | |
| Sony boot partition[lower-alpha 7] | F4019732-066E-4E12-8273-346C5641494F | |
| Lenovo boot partition[lower-alpha 7] | BFBFAFE7-A34F-448A-9A5B-6213EB736C22 | |
| Windows | Microsoft Reserved Partition (MSR)[44] | E3C9E316-0B5C-4DB8-817D-F92DF00215AE |
| Basic data partition[44][lower-alpha 8] | EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 | |
| Logical Disk Manager (LDM) metadata partition[44] | 5808C8AA-7E8F-42E0-85D2-E1E90434CFB3 | |
| Logical Disk Manager data partition[44] | AF9B60A0-1431-4F62-BC68-3311714A69AD | |
| Windows Recovery Environment[44] | DE94BBA4-06D1-4D40-A16A-BFD50179D6AC | |
| IBM General Parallel File System (GPFS) partition | 37AFFC90-EF7D-4E96-91C3-2D7AE055B174 | |
| Storage Spaces partition[46] | E75CAF8F-F680-4CEE-AFA3-B001E56EFC2D | |
| Storage Replica partition[47] | 558D43C5-A1AC-43C0-AAC8-D1472B2923D1 | |
| HP-UX | Data partition | 75894C1E-3AEB-11D3-B7C1-7B03A0000000 |
| Service partition | E2A1E728-32E3-11D6-A682-7B03A0000000 | |
| Linux[48][49][50][51] | Linux filesystem data[lower-alpha 8] | 0FC63DAF-8483-4772-8E79-3D69D8477DE4 |
| RAID partition | A19D880F-05FC-4D3B-A006-743F0F84911E | |
| Root partition (Alpha)[48] | 6523F8AE-3EB1-4E2A-A05A-18B695AE656F | |
| Root partition (ARC)[48] | D27F46ED-2919-4CB8-BD25-9531F3C16534 | |
| Root partition (ARM 32‐bit)[48] | 69DAD710-2CE4-4E3C-B16C-21A1D49ABED3 | |
| Root partition (AArch64)[48] | B921B045-1DF0-41C3-AF44-4C6F280D3FAE | |
| Root partition (IA-64)[48] | 993D8D3D-F80E-4225-855A-9DAF8ED7EA97 | |
| Root partition (LoongArch 64‐bit)[48] | 77055800-792C-4F94-B39A-98C91B762BB6 | |
| Root partition (mips: 32‐bit MIPS big‐endian)[48] | E9434544-6E2C-47CC-BAE2-12D6DEAFB44C | |
| Root partition (mips64: 64‐bit MIPS big‐endian)[48] | D113AF76-80EF-41B4-BDB6-0CFF4D3D4A25 | |
| Root partition (mipsel: 32‐bit MIPS little‐endian)[48] | 37C58C8A-D913-4156-A25F-48B1B64E07F0 | |
| Root partition (mips64el: 64‐bit MIPS little‐endian)[48] | 700BDA43-7A34-4507-B179-EEB93D7A7CA3 | |
| Root partition (PA-RISC)[48] | 1AACDB3B-5444-4138-BD9E-E5C2239B2346 | |
| Root partition (32‐bit PowerPC)[48] | 1DE3F1EF-FA98-47B5-8DCD-4A860A654D78 | |
| Root partition (64‐bit PowerPC big‐endian)[48] | 912ADE1D-A839-4913-8964-A10EEE08FBD2 | |
| Root partition (64‐bit PowerPC little‐endian)[48] | C31C45E6-3F39-412E-80FB-4809C4980599 | |
| Root partition (RISC-V 32‐bit)[48] | 60D5A7FE-8E7D-435C-B714-3DD8162144E1 | |
| Root partition (RISC-V 64‐bit)[48] | 72EC70A6-CF74-40E6-BD49-4BDA08E8F224 | |
| Root partition (s390)[48] | 08A7ACEA-624C-4A20-91E8-6E0FA67D23F9 | |
| Root partition (s390x)[48] | 5EEAD9A9-FE09-4A1E-A1D7-520D00531306 | |
| Root partition (TILE-Gx)[48] | C50CDD70-3862-4CC3-90E1-809A8C93EE2C | |
| Root partition (x86)[48] | 44479540-F297-41B2-9AF7-D131D5F0458A | |
| Root partition (x86-64)[48] | 4F68BCE3-E8CD-4DB1-96E7-FBCAF984B709 | |
| /usr partition (Alpha)[48] | E18CF08C-33EC-4C0D-8246-C6C6FB3DA024 | |
| /usr partition (ARC)[48] | 7978A683-6316-4922-BBEE-38BFF5A2FECC | |
| /usr partition (ARM 32‐bit)[48] | 7D0359A3-02B3-4F0A-865C-654403E70625 | |
| /usr partition (AArch64)[48] | B0E01050-EE5F-4390-949A-9101B17104E9 | |
| /usr partition (IA-64)[48] | 4301D2A6-4E3B-4B2A-BB94-9E0B2C4225EA | |
| /usr partition (LoongArch 64‐bit)[48] | E611C702-575C-4CBE-9A46-434FA0BF7E3F | |
| /usr partition (mips: 32‐bit MIPS big‐endian)[48] | 773B2ABC-2A99-4398-8BF5-03BAAC40D02B | |
| /usr partition (mips64: 64‐bit MIPS big‐endian)[48] | 57E13958-7331-4365-8E6E-35EEEE17C61B | |
| /usr partition (mipsel: 32‐bit MIPS little‐endian)[48] | 0F4868E9-9952-4706-979F-3ED3A473E947 | |
| /usr partition (mips64el: 64‐bit MIPS little‐endian)[48] | C97C1F32-BA06-40B4-9F22-236061B08AA8 | |
| /usr partition (PA-RISC)[48] | DC4A4480-6917-4262-A4EC-DB9384949F25 | |
| /usr partition (32‐bit PowerPC)[48] | 7D14FEC5-CC71-415D-9D6C-06BF0B3C3EAF | |
| /usr partition (64‐bit PowerPC big‐endian)[48] | 2C9739E2-F068-46B3-9FD0-01C5A9AFBCCA | |
| /usr partition (64‐bit PowerPC little‐endian)[48] | 15BB03AF-77E7-4D4A-B12B-C0D084F7491C | |
| /usr partition (RISC-V 32‐bit)[48] | B933FB22-5C3F-4F91-AF90-E2BB0FA50702 | |
| /usr partition (RISC-V 64‐bit)[48] | BEAEC34B-8442-439B-A40B-984381ED097D | |
| /usr partition (s390)[48] | CD0F869B-D0FB-4CA0-B141-9EA87CC78D66 | |
| /usr partition (s390x)[48] | 8A4F5770-50AA-4ED3-874A-99B710DB6FEA | |
| /usr partition (TILE-Gx)[48] | 55497029-C7C1-44CC-AA39-815ED1558630 | |
| /usr partition (x86)[48] | 75250D76-8CC6-458E-BD66-BD47CC81A812 | |
| /usr partition (x86-64)[48] | 8484680C-9521-48C6-9C11-B0720656F69E | |
| Root verity partition for dm-verity (Alpha)[48] | FC56D9E9-E6E5-4C06-BE32-E74407CE09A5 | |
| Root verity partition for dm-verity (ARC) [48] | 24B2D975-0F97-4521-AFA1-CD531E421B8D | |
| Root verity partition for dm-verity (ARM 32‐bit) [48] | 7386CDF2-203C-47A9-A498-F2ECCE45A2D6 | |
| Root verity partition for dm-verity (AArch64) [48] | DF3300CE-D69F-4C92-978C-9BFB0F38D820 | |
| Root verity partition for dm-verity (IA-64) [48] | 86ED10D5-B607-45BB-8957-D350F23D0571 | |
| Root verity partition for dm-verity (LoongArch 64‐bit) [48] | F3393B22-E9AF-4613-A948-9D3BFBD0C535 | |
| Root verity partition for dm-verity (mips: 32‐bit MIPS big‐endian) [48] | 7A430799-F711-4C7E-8E5B-1D685BD48607 | |
| Root verity partition for dm-verity (mips64: 64‐bit MIPS big‐endian) [48] | 579536F8-6A33-4055-A95A-DF2D5E2C42A8 | |
| Root verity partition for dm-verity (mipsel: 32‐bit MIPS little‐endian) [48] | D7D150D2-2A04-4A33-8F12-16651205FF7B | |
| Root verity partition for dm-verity (mips64el: 64‐bit MIPS little‐endian) [48] | 16B417F8-3E06-4F57-8DD2-9B5232F41AA6 | |
| Root verity partition for dm-verity (PA-RISC) [48] | D212A430-FBC5-49F9-A983-A7FEEF2B8D0E | |
| Root verity partition for dm-verity (64‐bit PowerPC little‐endian) [48] | 906BD944-4589-4AAE-A4E4-DD983917446A | |
| Root verity partition for dm-verity (64‐bit PowerPC big‐endian) [48] | 9225A9A3-3C19-4D89-B4F6-EEFF88F17631 | |
| Root verity partition for dm-verity (32‐bit PowerPC) [48] | 98CFE649-1588-46DC-B2F0-ADD147424925 | |
| Root verity partition for dm-verity (RISC-V 32‐bit) [48] | AE0253BE-1167-4007-AC68-43926C14C5DE | |
| Root verity partition for dm-verity (RISC-V 64‐bit) [48] | B6ED5582-440B-4209-B8DA-5FF7C419EA3D | |
| Root verity partition for dm-verity (s390) [48] | 7AC63B47-B25C-463B-8DF8-B4A94E6C90E1 | |
| Root verity partition for dm-verity (s390x) [48] | B325BFBE-C7BE-4AB8-8357-139E652D2F6B | |
| Root verity partition for dm-verity (TILE-Gx) [48] | 966061EC-28E4-4B2E-B4A5-1F0A825A1D84 | |
| Root verity partition for dm-verity (x86-64) [48] | 2C7357ED-EBD2-46D9-AEC1-23D437EC2BF5 | |
| Root verity partition for dm-verity (x86) [48] | D13C5D3B-B5D1-422A-B29F-9454FDC89D76 | |
| /usr verity partition for dm-verity (Alpha) [48] | 8CCE0D25-C0D0-4A44-BD87-46331BF1DF67 | |
| /usr verity partition for dm-verity (ARC) [48] | FCA0598C-D880-4591-8C16-4EDA05C7347C | |
| /usr verity partition for dm-verity (ARM 32‐bit) [48] | C215D751-7BCD-4649-BE90-6627490A4C05 | |
| /usr verity partition for dm-verity (AArch64) [48] | 6E11A4E7-FBCA-4DED-B9E9-E1A512BB664E | |
| /usr verity partition for dm-verity (IA-64) [48] | 6A491E03-3BE7-4545-8E38-83320E0EA880 | |
| /usr verity partition for dm-verity (LoongArch 64‐bit) [48] | F46B2C26-59AE-48F0-9106-C50ED47F673D | |
| /usr verity partition for dm-verity (mips: 32‐bit MIPS big‐endian) [48] | 6E5A1BC8-D223-49B7-BCA8-37A5FCCEB996 | |
| /usr verity partition for dm-verity (mips64: 64‐bit MIPS big‐endian) [48] | 81CF9D90-7458-4DF4-8DCF-C8A3A404F09B | |
| /usr verity partition for dm-verity (mipsel: 32‐bit MIPS little‐endian) [48] | 46B98D8D-B55C-4E8F-AAB3-37FCA7F80752 | |
| /usr verity partition for dm-verity (mips64el: 64‐bit MIPS little‐endian) [48] | 3C3D61FE-B5F3-414D-BB71-8739A694A4EF | |
| /usr verity partition for dm-verity (PA-RISC) [48] | 5843D618-EC37-48D7-9F12-CEA8E08768B2 | |
| /usr verity partition for dm-verity (64‐bit PowerPC little‐endian) [48] | EE2B9983-21E8-4153-86D9-B6901A54D1CE | |
| /usr verity partition for dm-verity (64‐bit PowerPC big‐endian) [48] | BDB528A5-A259-475F-A87D-DA53FA736A07 | |
| /usr verity partition for dm-verity (32‐bit PowerPC) [48] | DF765D00-270E-49E5-BC75-F47BB2118B09 | |
| /usr verity partition for dm-verity (RISC-V 32‐bit) [48] | CB1EE4E3-8CD0-4136-A0A4-AA61A32E8730 | |
| /usr verity partition for dm-verity (RISC-V 64‐bit) [48] | 8F1056BE-9B05-47C4-81D6-BE53128E5B54 | |
| /usr verity partition for dm-verity (s390) [48] | B663C618-E7BC-4D6D-90AA-11B756BB1797 | |
| /usr verity partition for dm-verity (s390x) [48] | 31741CC4-1A2A-4111-A581-E00B447D2D06 | |
| /usr verity partition for dm-verity (TILE-Gx) [48] | 2FB4BF56-07FA-42DA-8132-6B139F2026AE | |
| /usr verity partition for dm-verity (x86-64) [48] | 77FF5F63-E7B6-4633-ACF4-1565B864C0E6 | |
| /usr verity partition for dm-verity (x86) [48] | 8F461B0D-14EE-4E81-9AA9-049B6FB97ABD | |
| Root verity signature partition for dm-verity (Alpha)[48] | D46495B7-A053-414F-80F7-700C99921EF8 | |
| Root verity signature partition for dm-verity (ARC)}[48] | 143A70BA-CBD3-4F06-919F-6C05683A78BC | |
| Root verity signature partition for dm-verity (ARM 32‐bit)[48] | 42B0455F-EB11-491D-98D3-56145BA9D037 | |
| Root verity signature partition for dm-verity (AArch64)[48] | 6DB69DE6-29F4-4758-A7A5-962190F00CE3 | |
| Root verity signature partition for dm-verity (IA-64)[48] | E98B36EE-32BA-4882-9B12-0CE14655F46A | |
| Root verity signature partition for dm-verity (LoongArch 64‐bit)[48] | 5AFB67EB-ECC8-4F85-AE8E-AC1E7C50E7D0 | |
| Root verity signature partition for dm-verity (mips: 32‐bit MIPS big‐endian)[48] | BBA210A2-9C5D-45EE-9E87-FF2CCBD002D0 | |
| Root verity signature partition for dm-verity (mips64: 64‐bit MIPS big‐endian)[48] | 43CE94D4-0F3D-4999-8250-B9DEAFD98E6E | |
| Root verity signature partition for dm-verity (mipsel: 32‐bit MIPS little‐endian)[48] | C919CC1F-4456-4EFF-918C-F75E94525CA5 | |
| Root verity signature partition for dm-verity (mips64el: 64‐bit MIPS little‐endian)[48] | 904E58EF-5C65-4A31-9C57-6AF5FC7C5DE7 | |
| Root verity signature partition for dm-verity (PA-RISC)[48] | 15DE6170-65D3-431C-916E-B0DCD8393F25 | |
| Root verity signature partition for dm-verity (64‐bit PowerPC little‐endian)[48] | D4A236E7-E873-4C07-BF1D-BF6CF7F1C3C6 | |
| Root verity signature partition for dm-verity (64‐bit PowerPC big‐endian)[48] | F5E2C20C-45B2-4FFA-BCE9-2A60737E1AAF | |
| Root verity signature partition for dm-verity (32‐bit PowerPC)[48] | 1B31B5AA-ADD9-463A-B2ED-BD467FC857E7 | |
| Root verity signature partition for dm-verity (RISC-V 32‐bit)[48] | 3A112A75-8729-4380-B4CF-764D79934448 | |
| Root verity signature partition for dm-verity (RISC-V 64‐bit)[48] | EFE0F087-EA8D-4469-821A-4C2A96A8386A | |
| Root verity signature partition for dm-verity (s390)[48] | 3482388E-4254-435A-A241-766A065F9960 | |
| Root verity signature partition for dm-verity (s390x)[48] | C80187A5-73A3-491A-901A-017C3FA953E9 | |
| Root verity signature partition for dm-verity (TILE-Gx)[48] | B3671439-97B0-4A53-90F7-2D5A8F3AD47B | |
| Root verity signature partition for dm-verity (x86-64)[48] | 41092B05-9FC8-4523-994F-2DEF0408B176 | |
| Root verity signature partition for dm-verity (x86)[48] | 5996FC05-109C-48DE-808B-23FA0830B676 | |
| /usr verity signature partition for dm-verity (Alpha)[48] | 5C6E1C76-076A-457A-A0FE-F3B4CD21CE6E | |
| /usr verity signature partition for dm-verity (ARC)[48] | 94F9A9A1-9971-427A-A400-50CB297F0F35 | |
| /usr verity signature partition for dm-verity (ARM 32‐bit)[48] | D7FF812F-37D1-4902-A810-D76BA57B975A | |
| /usr verity signature partition for dm-verity (AArch64)[48] | C23CE4FF-44BD-4B00-B2D4-B41B3419E02A | |
| /usr verity signature partition for dm-verity (IA-64)[48] | 8DE58BC2-2A43-460D-B14E-A76E4A17B47F | |
| /usr verity signature partition for dm-verity (LoongArch 64‐bit)[48] | B024F315-D330-444C-8461-44BBDE524E99 | |
| /usr verity signature partition for dm-verity (mips: 32‐bit MIPS big‐endian)[48] | 97AE158D-F216-497B-8057-F7F905770F54 | |
| /usr verity signature partition for dm-verity (mips64: 64‐bit MIPS big‐endian)[48] | 05816CE2-DD40-4AC6-A61D-37D32DC1BA7D | |
| /usr verity signature partition for dm-verity (mipsel: 32‐bit MIPS little‐endian)[48] | 3E23CA0B-A4BC-4B4E-8087-5AB6A26AA8A9 | |
| /usr verity signature partition for dm-verity (mips64el: 64‐bit MIPS little‐endian)[48] | F2C2C7EE-ADCC-4351-B5C6-EE9816B66E16 | |
| /usr verity signature partition for dm-verity (PA-RISC)[48] | 450DD7D1-3224-45EC-9CF2-A43A346D71EE | |
| /usr verity signature partition for dm-verity (64‐bit PowerPC little‐endian)[48] | C8BFBD1E-268E-4521-8BBA-BF314C399557 | |
| /usr verity signature partition for dm-verity (64‐bit PowerPC big‐endian)[48] | 0B888863-D7F8-4D9E-9766-239FCE4D58AF | |
| /usr verity signature partition for dm-verity (32‐bit PowerPC)[48] | 7007891D-D371-4A80-86A4-5CB875B9302E | |
| /usr verity signature partition for dm-verity (RISC-V 32‐bit)[48] | C3836A13-3137-45BA-B583-B16C50FE5EB4 | |
| /usr verity signature partition for dm-verity (RISC-V 64‐bit)[48] | D2F9000A-7A18-453F-B5CD-4D32F77A7B32 | |
| /usr verity signature partition for dm-verity (s390)[48] | 17440E4F-A8D0-467F-A46E-3912AE6EF2C5 | |
| /usr verity signature partition for dm-verity (s390x)[48] | 3F324816-667B-46AE-86EE-9B0C0C6C11B4 | |
| /usr verity signature partition for dm-verity (TILE-Gx)[48] | 4EDE75E2-6CCC-4CC8-B9C7-70334B087510 | |
| /usr verity signature partition for dm-verity (x86-64)[48] | E7BB33FB-06CF-4E81-8273-E543B413E2E2 | |
| /usr verity signature partition for dm-verity (x86)[48] | 974A71C0-DE41-43C3-BE5D-5C5CCD1AD2C0 | |
| /boot, as an Extended Boot Loader (XBOOTLDR) partition[48][49] | BC13C2FF-59E6-4262-A352-B275FD6F7172 | |
| Swap partition[48][49] | 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F | |
| Logical Volume Manager (LVM) partition | E6D6D379-F507-44C2-A23C-238F2A3DF928 | |
| /home partition[48][49] | 933AC7E1-2EB4-4F13-B844-0E14E2AEF915 | |
| /srv (server data) partition[48][49] | 3B8F8425-20E0-4F3B-907F-1A25A76F98E8 | |
| Per‐user home partition[48] | 773F91EF-66D4-49B5-BD83-D683BF40AD16 | |
| Plain dm-crypt partition[52][53][54] | 7FFEC5C9-2D00-49B7-8941-3EA10A5586B7 | |
| LUKS partition[52][53][54][55] | CA7D7CCB-63ED-4C53-861C-1742536059CC | |
| Reserved | 8DA63339-0007-60C0-C436-083AC8230908 | |
| GNU/Hurd[56] | Linux filesystem data[57] | 0FC63DAF-8483-4772-8E79-3D69D8477DE4 |
| Linux Swap partition[58] | 0657FD6D-A4AB-43C4-84E5-0933C84B4F4F | |
| FreeBSD | Boot partition[59] | 83BD6B9D-7F41-11DC-BE0B-001560B84F0F |
| BSD disklabel partition[59] | 516E7CB4-6ECF-11D6-8FF8-00022D09712B | |
| Swap partition[59] | 516E7CB5-6ECF-11D6-8FF8-00022D09712B | |
| Unix File System (UFS) partition[59] | 516E7CB6-6ECF-11D6-8FF8-00022D09712B | |
| Vinum volume manager partition[59] | 516E7CB8-6ECF-11D6-8FF8-00022D09712B | |
| ZFS partition[59] | 516E7CBA-6ECF-11D6-8FF8-00022D09712B | |
| nandfs partition[60] | 74BA7DD9-A689-11E1-BD04-00E081286ACF | |
| macOS Darwin |
Hierarchical File System Plus (HFS+) partition | 48465300-0000-11AA-AA11-00306543ECAC |
| Apple APFS container APFS FileVault volume container |
7C3457EF-0000-11AA-AA11-00306543ECAC | |
| Apple UFS container | 55465300-0000-11AA-AA11-00306543ECAC | |
| ZFS[lower-alpha 9] | 6A898CC3-1DD2-11B2-99A6-080020736631 | |
| Apple RAID partition | 52414944-0000-11AA-AA11-00306543ECAC | |
| Apple RAID partition, offline | 52414944-5F4F-11AA-AA11-00306543ECAC | |
| Apple Boot partition (Recovery HD) | 426F6F74-0000-11AA-AA11-00306543ECAC | |
| Apple Label | 4C616265-6C00-11AA-AA11-00306543ECAC | |
| Apple TV Recovery partition | 5265636F-7665-11AA-AA11-00306543ECAC | |
| Apple Core Storage Container HFS+ FileVault volume container |
53746F72-6167-11AA-AA11-00306543ECAC | |
| Apple APFS Preboot partition | 69646961-6700-11AA-AA11-00306543ECAC | |
| Apple APFS Recovery partition | 52637672-7900-11AA-AA11-00306543ECAC | |
| Solaris illumos |
Boot partition | 6A82CB45-1DD2-11B2-99A6-080020736631 |
| Root partition | 6A85CF4D-1DD2-11B2-99A6-080020736631 | |
| Swap partition | 6A87C46F-1DD2-11B2-99A6-080020736631 | |
| Backup partition | 6A8B642B-1DD2-11B2-99A6-080020736631 | |
| /usr partition[lower-alpha 9] | 6A898CC3-1DD2-11B2-99A6-080020736631 | |
| /var partition | 6A8EF2E9-1DD2-11B2-99A6-080020736631 | |
| /home partition | 6A90BA39-1DD2-11B2-99A6-080020736631 | |
| Alternate sector | 6A9283A5-1DD2-11B2-99A6-080020736631 | |
| Reserved partition | 6A945A3B-1DD2-11B2-99A6-080020736631 | |
| 6A9630D1-1DD2-11B2-99A6-080020736631 | ||
| 6A980767-1DD2-11B2-99A6-080020736631 | ||
| 6A96237F-1DD2-11B2-99A6-080020736631 | ||
| 6A8D2AC7-1DD2-11B2-99A6-080020736631 | ||
| NetBSD[61][lower-alpha 10] | Swap partition | 49F48D32-B10E-11DC-B99B-0019D1879648 |
| FFS partition | 49F48D5A-B10E-11DC-B99B-0019D1879648 | |
| LFS partition | 49F48D82-B10E-11DC-B99B-0019D1879648 | |
| RAID partition | 49F48DAA-B10E-11DC-B99B-0019D1879648 | |
| Concatenated partition | 2DB519C4-B10F-11DC-B99B-0019D1879648 | |
| Encrypted partition | 2DB519EC-B10F-11DC-B99B-0019D1879648 | |
| ChromeOS[62][63] | ChromeOS kernel | FE3A2A5D-4F32-41A7-B725-ACCC3285A309 |
| ChromeOS rootfs | 3CB8E202-3B7E-47DD-8A3C-7FF2A13CFCEC | |
| ChromeOS firmware | CAB6E88E-ABF3-4102-A07A-D4BB9BE3C1D3 | |
| ChromeOS future use | 2E0A753D-9E48-43B0-8337-B15192CB1B5E | |
| ChromeOS miniOS | 09845860-705F-4BB5-B16C-8A8A099CAF52 | |
| ChromeOS hibernate | 3F0F8318-F146-4E6B-8222-C28C8F02E0D5 | |
| Container Linux by CoreOS[64] | /usr partition (coreos-usr) | 5DFBF5F4-2848-4BAC-AA5E-0D9A20B745A6 |
| Resizable rootfs (coreos-resize) | 3884DD41-8582-4404-B9A8-E9B84F2DF50E | |
| OEM customizations (coreos-reserved) | C95DC21A-DF0E-4340-8D7B-26CBFA9A03E0 | |
| Root filesystem on RAID (coreos-root-raid) | BE9067B9-EA49-4F15-B4F6-F36F8C9E1818 | |
| Haiku[65] | Haiku BFS | 42465331-3BA3-10F1-802A-4861696B7521 |
| MidnightBSD[66][lower-alpha 10] | Boot partition | 85D5E45E-237C-11E1-B4B3-E89A8F7FC3A7 |
| Data partition | 85D5E45A-237C-11E1-B4B3-E89A8F7FC3A7 | |
| Swap partition | 85D5E45B-237C-11E1-B4B3-E89A8F7FC3A7 | |
| Unix File System (UFS) partition | 0394EF8B-237E-11E1-B4B3-E89A8F7FC3A7 | |
| Vinum volume manager partition | 85D5E45C-237C-11E1-B4B3-E89A8F7FC3A7 | |
| ZFS partition | 85D5E45D-237C-11E1-B4B3-E89A8F7FC3A7 | |
| Ceph[lower-alpha 11] | Journal | 45B0969E-9B03-4F30-B4C6-B4B80CEFF106 |
| dm-crypt journal | 45B0969E-9B03-4F30-B4C6-5EC00CEFF106 | |
| OSD | 4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D | |
| dm-crypt OSD | 4FBD7E29-9D25-41B8-AFD0-5EC00CEFF05D | |
| Disk in creation | 89C57F98-2FE5-4DC0-89C1-F3AD0CEFF2BE | |
| dm-crypt disk in creation | 89C57F98-2FE5-4DC0-89C1-5EC00CEFF2BE | |
| Block | CAFECAFE-9B03-4F30-B4C6-B4B80CEFF106 | |
| Block DB | 30CD0809-C2B2-499C-8879-2D6B78529876 | |
| Block write-ahead log | 5CE17FCE-4087-4169-B7FF-056CC58473F9 | |
| Lockbox for dm-crypt keys | FB3AABF9-D25F-47CC-BF5E-721D1816496B | |
| Multipath OSD | 4FBD7E29-8AE0-4982-BF9D-5A8D867AF560 | |
| Multipath journal | 45B0969E-8AE0-4982-BF9D-5A8D867AF560 | |
| Multipath block | CAFECAFE-8AE0-4982-BF9D-5A8D867AF560 | |
| Multipath block | 7F4A666A-16F3-47A2-8445-152EF4D03F6C | |
| Multipath block DB | EC6D6385-E346-45DC-BE91-DA2A7C8B3261 | |
| Multipath block write-ahead log | 01B41E1B-002A-453C-9F17-88793989FF8F | |
| dm-crypt block | CAFECAFE-9B03-4F30-B4C6-5EC00CEFF106 | |
| dm-crypt block DB | 93B0052D-02D9-4D8A-A43B-33A3EE4DFBC3 | |
| dm-crypt block write-ahead log | 306E8683-4FE2-4330-B7C0-00A917C16966 | |
| dm-crypt LUKS journal | 45B0969E-9B03-4F30-B4C6-35865CEFF106 | |
| dm-crypt LUKS block | CAFECAFE-9B03-4F30-B4C6-35865CEFF106 | |
| dm-crypt LUKS block DB | 166418DA-C469-4022-ADF4-B30AFD37F176 | |
| dm-crypt LUKS block write-ahead log | 86A32090-3647-40B9-BBBD-38D8C573AA86 | |
| dm-crypt LUKS OSD | 4FBD7E29-9D25-41B8-AFD0-35865CEFF05D | |
| OpenBSD | Data partition | 824CC7A0-36A8-11E3-890A-952519AD3F61 |
| QNX | Power-safe (QNX6) file system[69] | CEF5A9AD-73BC-4601-89F3-CDEEEEE321A1 |
| Plan 9 | Plan 9 partition | C91818F9-8025-47AF-89D2-F030D7000C2C |
| VMware ESX | vmkcore (coredump partition) | 9D275380-40AD-11DB-BF97-000C2911D1B8 |
| VMFS filesystem partition | AA31E02A-400F-11DB-9590-000C2911D1B8 | |
| VMware Reserved | 9198EFFC-31C0-11DB-8F78-000C2911D1B8 | |
| Android-IA[70][71][72][73] | Bootloader | 2568845D-2332-4675-BC39-8FA5A4748D15 |
| Bootloader2 | 114EAFFE-1552-4022-B26E-9B053604CF84 | |
| Boot | 49A4D17F-93A3-45C1-A0DE-F50B2EBE2599 | |
| Recovery | 4177C722-9E92-4AAB-8644-43502BFD5506 | |
| Misc | EF32A33B-A409-486C-9141-9FFB711F6266 | |
| Metadata | 20AC26BE-20B7-11E3-84C5-6CFDB94711E9 | |
| System | 38F428E6-D326-425D-9140-6E0EA133647C | |
| Cache | A893EF21-E428-470A-9E55-0668FD91A2D9 | |
| Data | DC76DDA9-5AC1-491C-AF42-A82591580C0D | |
| Persistent | EBC597D0-2053-4B15-8B64-E0AAC75F4DB1 | |
| Vendor | C5A0AEEC-13EA-11E5-A1B1-001E67CA0C3C | |
| Config | BD59408B-4514-490D-BF12-9878D963F378 | |
| Factory | 8F68CC74-C5E5-48DA-BE91-A0C8C15E9C80 | |
| Factory (alt)[74] | 9FDAA6EF-4B3F-40D2-BA8D-BFF16BFB887B | |
| Fastboot / Tertiary[75][76] | 767941D0-2085-11E3-AD3B-6CFDB94711E9 | |
| OEM | AC6D7924-EB71-4DF8-B48D-E267B27148FF | |
| Android 6.0+ ARM | Android Meta | 19A710A2-B3CA-11E4-B026-10604B889DCF |
| Android EXT | 193D1EA4-B3CA-11E4-B075-10604B889DCF | |
| Open Network Install Environment (ONIE) | Boot | 7412F7D5-A156-4B13-81DC-867174929325 |
| Config | D4E6E2CD-4469-46F3-B5CB-1BFF57AFC149 | |
| PowerPC | PReP boot | 9E1A2D38-C612-4316-AA26-8B49521E5A8B |
| freedesktop.org OSes (Linux, etc.) | Shared boot loader configuration[77] | BC13C2FF-59E6-4262-A352-B275FD6F7172 |
| Atari TOS | Basic data partition (GEM, BGM, F32) | 734E5AFE-F61A-11E6-BC64-92361F002671 |
| VeraCrypt | Encrypted data partition | 8C8F8EFF-AC95-4770-814A-21994F2DBC8F |
| OS/2 | ArcaOS Type 1 | 90B6FF38-B98F-4358-A21F-48F35B4A8AD3 |
| Storage Performance Development Kit (SPDK) | SPDK block device[78] | 7C5222BD-8F5D-4087-9C00-BF9843C7B58C |
| barebox bootloader | barebox-state[79] | 4778ED65-BF42-45FA-9C5B-287A1DC4AAB1 |
| U-Boot bootloader | U-Boot environment[80][81] | 3DE21764-95BD-54BD-A5C3-4ABE786F38A8 |
| SoftRAID[citation needed] | SoftRAID_Status | B6FA30DA-92D2-4A9A-96F1-871EC6486200 |
| SoftRAID_Scratch | 2E313465-19B9-463F-8126-8A7993773801 | |
| SoftRAID_Volume | FA709C7E-65B1-4593-BFD5-E71D61DE9B02 | |
| SoftRAID_Cache | BBBA6DF5-F46F-4A89-8F59-8765B2727503 | |
| Fuchsia standard partitions[82] | Bootloader (slot A/B/R) | FE8A2634-5E2E-46BA-99E3-3A192091A350 |
| Durable mutable encrypted system data | D9FD4535-106C-4CEC-8D37-DFC020CA87CB | |
| Durable mutable bootloader data (including A/B/R metadata) | A409E16B-78AA-4ACC-995C-302352621A41 | |
| Factory-provisioned read-only system data | F95D940E-CABA-4578-9B93-BB6C90F29D3E | |
| Factory-provisioned read-only bootloader data | 10B8DBAA-D2BF-42A9-98C6-A7C5DB3701E7 | |
| Fuchsia Volume Manager | 49FD7CB8-DF15-4E73-B9D9-992070127F0F | |
| Verified boot metadata (slot A/B/R) | 421A8BFC-85D9-4D85-ACDA-B64EEC0133E9 | |
| Zircon boot image (slot A/B/R) | 9B37FFF6-2E58-466A-983A-F7926D0B04E0 | |
| Fuchsia legacy partitions[82][lower-alpha 12] | ||
| fuchsia-esp | C12A7328-F81F-11D2-BA4B-00A0C93EC93B | |
| fuchsia-system | 606B000B-B7C7-4653-A7D5-B737332C899D | |
| fuchsia-data | 08185F0C-892D-428A-A789-DBEEC8F55E6A | |
| fuchsia-install | 48435546-4953-2041-494E-5354414C4C52 | |
| fuchsia-blob | 2967380E-134C-4CBB-B6DA-17E7CE1CA45D | |
| fuchsia-fvm | 41D0E340-57E3-954E-8C1E-17ECAC44CFF5 | |
| Zircon boot image (slot A) | DE30CC86-1F4A-4A31-93C4-66F147D33E05 | |
| Zircon boot image (slot B) | 23CC04DF-C278-4CE7-8471-897D1A4BCDF7 | |
| Zircon boot image (slot R) | A0E5CF57-2DEF-46BE-A80C-A2067C37CD49 | |
| sys-config | 4E5E989E-4C86-11E8-A15B-480FCF35F8E6 | |
| factory-config | 5A3A90BE-4C86-11E8-A15B-480FCF35F8E6 | |
| bootloader | 5ECE94FE-4C86-11E8-A15B-480FCF35F8E6 | |
| guid-test | 8B94D043-30BE-4871-9DFA-D69556E8C1F3 | |
| Verified boot metadata (slot A) | A13B4D9A-EC5F-11E8-97D8-6C3BE52705BF | |
| Verified boot metadata (slot B) | A288ABF2-EC5F-11E8-97D8-6C3BE52705BF | |
| Verified boot metadata (slot R) | 6A2460C3-CD11-4E8B-80A8-12CCE268ED0A | |
| misc | 1D75395D-F2C6-476B-A8B7-45CC1C97B476 | |
| emmc-boot1 | 900B0FC5-90CD-4D4F-84F9-9F8ED579DB88 | |
| emmc-boot2 | B2B2E8D1-7C10-4EBC-A2D0-4614568260AD |
See also
- Advanced Active Partition (AAP)
- Apple Partition Map (APM)
- Boot Engineering Extension Record (BEER)
- BSD disklabel
- Device Configuration Overlay (DCO)
- Extended Boot Record (EBR)
- Host Protected Area (HPA)
- Partition alignment
- Rigid Disk Block (RDB)
- Volume Table of Contents (VTOC)
Notes
- ↑ Adding
ULLsuffix to an integer constant makes it of typeunsigned long long int. - ↑ Third party implementation exists (GPTTSD)
- ↑ Only if using its service pack 1 or 2
- ↑ In a multi-disk setup, non-UEFI bootloader (boot drive) requires MBR-based partitioning, while a system drive can use GUID partitioning.
- ↑ The GUIDs in this table are written as per RFC 4122, i.e. big-endian byte order, recognizable by the position of the version bits. For example, the GUID for an EFI System partition (
C12A7328-F81F-11D2-BA4B-00A0C93EC93B), when serialized in GPT data structures (little-endian), corresponds to the hex sequence28 73 2A C1 1F F8 D2 11 BA 4B 00 A0 C9 3E C9 3B. The first three blocks are byte-swapped to little-endian, the last is a byte array. See details in TN2166[12] - ↑ The formation of this GUID does not follow the GUID definition; it is formed by using the ASCII codes for the string "Hah!IdontNeedEFI". Such formation of "GUID" value breaks down the guaranteed uniqueness of GUID.
- ↑ 7.0 7.1 Some computer manufacturers have their own GUIDs for partitions that are analogous to the EFI System Partition, but that hold boot loaders to launch manufacturer-specific recovery tools.[43]
- ↑ 8.0 8.1 Previously, Linux used the same GUID for the data partitions as Windows (Basic data partition: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7). Linux never had a separate unique partition type GUID defined for its data partitions. This created problems when dual-booting Linux and Windows in UEFI-GPT setup. The new GUID (Linux filesystem data: 0FC63DAF-8483-4772-8E79-3D69D8477DE4) was defined jointly by GPT fdisk and GNU Parted developers.[45] It is identified as type code 0x8300 in GPT fdisk.
- ↑ 9.0 9.1 The GUID for
/usron Solaris is used as a generic GUID for ZFS by macOS. - ↑ 10.0 10.1 NetBSD and MidnightBSD had used the FreeBSD GUIDs before their unique GUIDs were created.
- ↑ The Ceph filesystem uses GUIDs to mark the state of preparation a disk is in.[67][68]
- ↑ The legacy Fuchsia GUIDs had two oddities: UUIDs were not generated randomly (several runs of bits were common between partitions), and partitions were uniquely identified by type GUID. The standardized scheme uses randomly-generated GUIDs, and slotted partitions (e.g.
zircon_{a,b,r}) share the same type and are distinguished by name and unique GUID.[83]
References
- ↑ 1.0 1.1 "FAQ: Drive Partition Limits". 2010. https://www.uefi.org/sites/default/files/resources/UEFI_Drive_Partition_Limits_Fact_Sheet.pdf.
- ↑ 2.0 2.1 2.2 "Unified Extensible Firmware Interface (UEFI) Specification". 29 August 2022. p. 110. https://uefi.org/sites/default/files/resources/UEFI_Spec_2_10_Aug29.pdf.
- ↑ Swinburne, Richard (1 April 2010). "The Facts: 4K Advanced Format Hard Disks". https://bit-tech.net/reviews/tech/storage/the-facts-4k-advanced-format-hard-disks/.
- ↑ Smith, Ryan (18 December 2009). "Western Digital's Advanced Format: The 4K Sector Transition Begins". https://www.anandtech.com/show/2888.
- ↑ "Western Digital's Advanced Format: The 4K Sector Transition Begins". Anandtech. http://anandtech.com/storage/showdoc.aspx?i=3691.
- ↑ "Enterprise Capacity 3.5 HDD Data Sheet" (PDF). Seagate Technology. April 23, 2014. p. 2. http://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprise-capacity-3-5-hdd/constellation-es-4/en-us/docs/enterprise-capacity-3-5-hdd-ds1791-4-1404us.pdf#page=2. Retrieved August 10, 2014.
- ↑ "WD Re Datacenter Distribution Specification Sheet" (PDF). Western Digital. January 21, 2016. p. 2. http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-800066.pdf#page=2. Retrieved February 14, 2016.
- ↑ "Advanced format (4K) disk compatibility update (Windows)". November 28, 2012. http://msdn.microsoft.com/en-us/library/windows/desktop/hh848035(v=vs.85).aspx. Retrieved January 3, 2013.
- ↑ "Microsoft support policy for 4K sector hard drives in Windows". Microsoft. http://support.microsoft.com/kb/2510009. Retrieved October 24, 2013.
- ↑ "UEFI specification". http://www.uefi.org/specifications.
- ↑ 11.0 11.1 11.2 11.3 Smith, Roderick (3 July 2012). "Make the most of large drives with GPT and Linux". IBM. http://www.ibm.com/developerworks/library/l-gpt/.
- ↑ 12.0 12.1 12.2 12.3 "Technical Note TN2166: Secrets of the GPT". Apple. 2006-11-06. https://developer.apple.com/library/mac/technotes/tn2166/_index.html#//apple_ref/doc/uid/DTS10003927-CH1-SUBSECTION11.
- ↑ The GPT header contains a field that specifies the size of a partition table entry. The minimum required is 128 bytes, but implementations must allow for other values. See "Mac Developer Library". Apple. https://developer.apple.com/mac/library/technotes/tn2006/tn2166.html#SECGPTOVERVIEW.
- ↑ Leach, P.; Mealling, M.; Salz, R. (July 2005), A Universally Unique IDentifier (UUID) URN Namespace, Internet Engineering Task Force, doi:10.17487/RFC4122, RFC 4122, https://tools.ietf.org/html/rfc4122, retrieved 18 December 2020
- ↑ Elliott, Rob (4 January 2010). "e09127r3 EDD-4 Hybrid MBR Boot Code Annex". http://t13.org/documents/UploadedDocuments/docs2010/e09127r3-EDD-4_Hybrid_MBR_boot_code_annex.pdf.
- ↑ "GPT | Microsoft Docs". https://technet.microsoft.com/en-us/library/cc753455.aspx#Anchor_1.
- ↑ "CREATE_PARTITION_PARAMETERS (vds.h) - Win32 apps | Microsoft Docs". https://msdn.microsoft.com/en-us/library/aa381635.aspx.
- ↑ "Disk Format". https://chromium.googlesource.com/chromiumos/docs/+/HEAD/disk_format.md#Selecting-the-kernel.
- ↑ "Ubuntu on MacBook". Community Documentation. Ubuntu. https://help.ubuntu.com/community/MacBook.
- ↑ "GNU Parted FAQ". https://www.gnu.org/software/parted/faq.shtml#features.
- ↑ "mklabel". Parted Manual. GNU. https://www.gnu.org/software/parted/manual/html_node/mklabel.html.
- ↑ "fdisk: add GPT support". kernel.org. 2013-09-27. https://git.kernel.org/cgit/utils/util-linux/util-linux.git/commit/?id=766d5156c43b784700d28d1c1141008b2bf35ed7.
- ↑ Bueso, Davidlohr (2013-09-28). "fdisk updates and GPT support". http://blog.stgolabs.net/2012/09/fdisk-updates-and-gpt-support.html.
- ↑ "DISK_MAX_PARTS define". https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/include/linux/genhd.h.
- ↑ "Myths and Facts About Intel Macs". rEFIt. Source forge. http://refit.sourceforge.net/myths/.
- ↑ "Significant changes from NetBSD 5.0 to 6.0". http://www.netbsd.org/changes/changes-6.0.html..
- ↑ "Significant changes from NetBSD 5.0 to 6.0 (NetBSD/i386)". http://www.netbsd.org/changes/changes-6.0.html#port-i386..
- ↑ "Significant changes from NetBSD 5.0 to 6.0 (NetBSD/amd64)". http://www.netbsd.org/changes/changes-6.0.html#port-amd64..
- ↑ "OpenBSD 5.9". https://www.openbsd.org/59.html..
- ↑ "Booting from a ZFS Root File System". Oracle. http://docs.oracle.com/cd/E19963-01/html/821-1448/ggpco.html.
- ↑ "idisk(1M)". Hewlett-Packard. https://nixdoc.net/man-pages/HP-UX/man1/idisk.1m.html.
- ↑ 32.0 32.1 32.2 32.3 "Windows and GPT FAQ". 1 June 2017. https://msdn.microsoft.com/en-us/library/windows/hardware/dn640535(v=vs.85).aspx.
- ↑ Windows 8 32-bit supports booting from UEFI-based PC (x86-32 only) using GPT-based disks.
- ↑ Windows 8.1 32-bit supports booting from UEFI-based PC (x86-32 only) using GPT-based disks.
- ↑ Windows 10 32-bit supports booting from UEFI-based PC (x86-32 only) using GPT-based disks.
- ↑ Microsoft raises the speed limit with the availability of 64-bit editions of Windows Server 2003 and Windows XP Professional
- ↑ Windows 8 64-bit supports booting from UEFI-based PC (x86-64 only) using GPT-based disks.
- ↑ Windows 8.1 64-bit supports booting from UEFI-based PC (x86-64 only) using GPT-based disks.
- ↑ Windows 10 64-bit supports booting from UEFI-based PC (x86-64 only) using GPT-based disks.
- ↑ Microsoft's 'Weirdest Release': Windows Server 2022 Quietly Becomes Generally Available
- ↑ "Archived copy". ftp://download.gigabyte.ru/manual/mb_manual_intel-ui_e.pdf.
- ↑ "F6F: Funtoo Linux and Intel Rapid Start Technology". Blog.adios.tw. 2012-10-30. http://blog.adios.tw/2012/10/funtoo-linux-and-intel-rapid-start.html.
- ↑ GPT fdisk: parttypes.cc, line 198
- ↑ 44.0 44.1 44.2 44.3 44.4 "PARTITION_INFORMATION_GPT - Win32 apps". https://docs.microsoft.com/en-us/windows/win32/api/winioctl/ns-winioctl-partition_information_gpt.
- ↑ Smith, Rod (23 June 2011). "Need for a unique Linux GPT GUID type code (PATCH included)". bug-parted (Mailing list). lists.gnu.org. Retrieved 12 April 2016.
- ↑ Sergei Antonov (2014-07-31). "libfdisk: (gpt) add Microsoft Storage Spaces GUID". https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=210d4595dea9ff998a04ba07b3d07694abd32d24.
- ↑ Known issues with Storage Replica
- ↑ 48.000 48.001 48.002 48.003 48.004 48.005 48.006 48.007 48.008 48.009 48.010 48.011 48.012 48.013 48.014 48.015 48.016 48.017 48.018 48.019 48.020 48.021 48.022 48.023 48.024 48.025 48.026 48.027 48.028 48.029 48.030 48.031 48.032 48.033 48.034 48.035 48.036 48.037 48.038 48.039 48.040 48.041 48.042 48.043 48.044 48.045 48.046 48.047 48.048 48.049 48.050 48.051 48.052 48.053 48.054 48.055 48.056 48.057 48.058 48.059 48.060 48.061 48.062 48.063 48.064 48.065 48.066 48.067 48.068 48.069 48.070 48.071 48.072 48.073 48.074 48.075 48.076 48.077 48.078 48.079 48.080 48.081 48.082 48.083 48.084 48.085 48.086 48.087 48.088 48.089 48.090 48.091 48.092 48.093 48.094 48.095 48.096 48.097 48.098 48.099 48.100 48.101 48.102 48.103 48.104 48.105 48.106 48.107 48.108 48.109 48.110 48.111 48.112 48.113 48.114 48.115 48.116 48.117 48.118 48.119 48.120 48.121 48.122 48.123 48.124 48.125 48.126 48.127 48.128 48.129 48.130 48.131 The Discoverable Partitions Specification (DPS)
- ↑ 49.0 49.1 49.2 49.3 49.4 systemd-gpt-auto-generator(8)
- ↑ Home Directories
- ↑ The Boot Loader Specification
- ↑ 52.0 52.1 "[dm-crypt] LUKS GPT GUID". Saout.de. http://www.saout.de/pipermail/dm-crypt/2014-January/003855.html.
- ↑ 53.0 53.1 "[dm-crypt] LUKS GPT GUID". Saout.de. http://www.saout.de/pipermail/dm-crypt/2014-January/003859.html.
- ↑ 54.0 54.1 "pyuefi source code". https://bitbucket.org/mmabey/pyuefi/src/master/pyuefi/partition_types/uefi.py.
- ↑ "udisks-2.7.4 source code". 10 July 2022. https://github.com/storaged-project/udisks/blob/udisks-2.7.4/src/udiskslinuxblock.c#L2363.
- ↑ The GNU/Hurd User's Guide: Installing, Internet Install
- ↑ Hurd and GRUB use the same Linux ext2 file system to run and it no longer supports "UFS". https://git.savannah.gnu.org/cgit/hurd/hurd.git/commit/?id=84cf9c0f312637b670cc87224ff7e7c4da659e36. file system
- ↑ Hurd uses the same Linux swap file system
- ↑ 59.0 59.1 59.2 59.3 59.4 59.5 "FreeBSD System Manager's Manual gpart(8)". https://www.freebsd.org/cgi/man.cgi?query=gpart&apropos=0&sektion=8&manpath=FreeBSD+13.0-RELEASE&arch=default&format=html. Retrieved 2021-08-21.
- ↑ "Add a partition type for nandfs to the apm, bsd, gpt and vtoc8 schemes. · freebsd/freebsd-src@f24a822 · GitHub". https://github.com/freebsd/freebsd-src/commit/f24a8224b2046c7b7e4525ccb94b8e1f39a600d4#diff-d173c53f561bf0a9536ac882e798fca502622ded0a8e4ac7a8beb15205896327. Retrieved 2021-08-21.
- ↑ "CVS log for src/sys/sys/disklabel_gpt.h". Cvsweb.netbsd.org. http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/sys/disklabel_gpt.h?only_with_tag=MAIN.
- ↑ "Disk Format - The Chromium Projects". Chromium.org. https://chromium.googlesource.com/chromiumos/docs/+/HEAD/disk_format.md.
- ↑ "Disk Format - The Chromium Projects". Chromium.org. https://sites.google.com/a/chromium.org/dev/chromium-os/chromiumos-design-docs/disk-format#TOC-Partition-types.
- ↑ "Constants and IDs". CoreOS. https://coreos.com/os/docs/latest/constants-and-ids.html#gpt-partition-types.
- ↑ src/add-ons/kernel/partitioning_systems/gpt/gpt_known_guids.h
- ↑ http://www.midnightbsd.org/cgi-bin/cvsweb.cgi/src/sys/sys/gpt.h.diff?r1=1.4;r2=1.5[yes|permanent dead link|dead link}}] src/sys/sys/gpt.h
- ↑ Script to set up a ceph disk: ceph-disk, lines 76-81
- ↑ ceph-disk labels
- ↑ QNX Power-safe filesystem
- ↑ "gpt.ini (github.com/android-ia/device-androidia-mixins)". https://github.com/android-ia/device-androidia-mixins/blob/master/groups/boot-arch/android_ia/gpt.ini.
- ↑ "gpt.ini (github.com/android-ia/device-androidia)". https://github.com/android-ia/device-androidia/blob/master/androidia_64/gpt.ini.
- ↑ "gpt.ini (github.com/android-ia/vendor_intel_baytrail)". https://github.com/android-ia/vendor_intel_baytrail/blob/master/minnow_max/gpt.ini.
- ↑ "gpt-sample.ini (github.com/android-ia/platform_bootable_userfastboot)". https://github.com/android-ia/platform_bootable_userfastboot/blob/master/gpt-sample.ini.
- ↑ "gpt_ini2bin.py (android.googlesource.com/platform/hardware/bsp/intel)". https://android.googlesource.com/platform/hardware/bsp/intel/+/e2ef91a5723be4c50e0bd93f82c329d262c2f366/soc/common/tools/gpt_ini2bin.py.
- ↑ "gpt.c (github.com/android-ia/platform_bootable_userfastboot)". https://github.com/android-ia/platform_bootable_userfastboot/blob/master/libgpt/gpt.c.
- ↑ "gpt_ini2bin.py (github.com/android-ia/vendor_intel_common)". https://github.com/android-ia/vendor_intel_common/blob/master/gpt_bin/gpt_ini2bin.py.
- ↑ "The Boot Loader Specification". https://freedesktop.org/wiki/Specifications/BootLoaderSpec/.
- ↑ "SPDK Block Device User Guide". https://spdk.io/doc/bdev.html#bdev_ug_gpt.
- ↑ "Barebox State Framework". https://barebox.org/doc/latest/user/state.html?highlight=guid#sd-emmc-and-ata.
- ↑ Villemoes, Rasmus (2020-11-17). "RFC: Partition type GUID for U-Boot environment". U-Boot mailing list (Mailing list). Retrieved 2021-09-28.
- ↑ "U-boot 2021.07 source code: include/part_efi.h". https://source.denx.de/u-boot/u-boot/-/blob/v2021.07/include/part_efi.h#L59-61.
- ↑ 82.0 82.1 zircon/system/public/zircon/hw/gpt.h
- ↑ "[paver add support for new partition scheme"]. https://cs.opensource.google/fuchsia/fuchsia/+/0010ded76edc81fcde8d4582461dc628447e3810. Retrieved 2021-10-22.
External links
- Microsoft TechNet: Disk Sectors on GPT Disks (archived page)
- Microsoft Windows Deployment: Converting MBR to GPT without dats loss
- Microsoft TechNet: Troubleshooting Disks and File Systems
- Microsoft TechNet: Using GPT Drives
- Microsoft: FAQs on Using GPT disks in Windows
- Microsoft Technet: How Basic Disks and Volumes Work A bit MS-specific but good figures relate GPT to older MBR format and protective-MBR, shows layouts of complete disks, and how to interpret partition-table hexdumps.
- Apple Developer Connection: Secrets of the GPT
- Make the most of large drives with GPT and Linux
- Convert Windows Vista SP1+ or 7 x86_64 boot from BIOS-MBR mode to UEFI-GPT mode without Reinstall
- Support for GPT (Partition scheme) and HDD greater than 2.19 TB in Microsoft Windows XP
- Setting up a RAID volume in Linux with >2TB disks
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