gdisk partition table editor

This is a simplified version of the documentation without discussion and with examples.

For the original see RodsBooks Thanks to Roderick W. Smith and additional contributers.

Text, menu partition editor, includes ability to convert MBR partition table to GPT.

sudo gdisk -l /dev/disk # Lists the partition table.

sudo /usr/local/bin/gdisk -l /dev/disk0
GPT fdisk (gdisk) version 1.0.1

Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
  MBR: hybrid
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with hybrid MBR; using GPT.
Disk /dev/disk0: 625142448 sectors, 298.1 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): A4EA6CAD-DDA9-400E-AA1B-7FF1F2BDF062
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 625142414
Partitions will be aligned on 8-sector boundaries
Total free space is 2178782 sectors (1.0 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              40          409639   200.0 MiB   EF00  EFI System Partition
   2          409640        98065887   46.6 GiB    AF00  Macintosh HD
   3        98556832        99826367   619.9 MiB   AF00  Recovery HD
   4        99827712       281176527   86.5 GiB    AF00  PHOTOS90
   5       282446072       407457295   59.6 GiB    AF00  HDIMAGES
   6       407719440       496488895   42.3 GiB    AF00  DATA45G
   7       496751040       606991511   52.6 GiB    AF00  HDIMAGES 2
   8       606991512       608261047   619.9 MiB   AB00  Recovery HD
   9       608261048       624880263   7.9 GiB     AF00  recovQ8GB
  10        98125020        98494514   180.4 MiB   AF00  email_cache

7/5/18 after testdisk manual recovery


Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: not present

*****
Found invalid GPT and valid MBR; converting MBR to GPT format
in memory.
*****

Disk /dev/sdb: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 5093F812-240C-4D50-8098-A343165D167C4
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 8-sector boundaries
Total free space is 133967916 sectors (63.9 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1        2048        206847           100MiB 0700 Microsoft basic data
   2       206911      115392511       54.9 GiB
3 missing
   4    946120704      948932607        1.3
   5    146120704      179912703       16.1
   6    179916800      180936703         .498
   7    180938752      197322751        7.8
   8    197324800      234188799       17.6
   9    234190849                     255.9
  10    770861056                       1
  11    772911104                      40
  12    907976704                       1
  13    910026752                       3
  14    926550616                        .1
  15    940802048                        2.5

No modifications are written implicitly.
Until explicitly written with w use quit to leave partition table unchanged.

`p`	print partition table see -l
`v`	verify the changed partition table Caution: Partition 10 doesn't begin on a 8-sector boundary. This may result in degraded performance on some modern (2009 and later) hard disks. Consult ibm.com/developerworks/linux/library/l-4kb-sector-disks/ for information on disk alignment. No problems found. 2178782 free sectors (1.0 GiB) available in 8 segments, the largest of which is 1269544 (619.9 MiB) in size.
`i`	information; prompted for partition number command (? for help): i Partition number (1-10): 1 Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System) Partition unique GUID: 74B80E3E-D90A-4946-9B56-993F85901214 First sector: 40 (at 20.0 KiB) Last sector: 409639 (at 200.0 MiB) Partition size: 409600 sectors (200.0 MiB) Attribute flags: 0000000000000000 Partition name: 'EFI System Partition' Command (? for help): I Partition number (1-10):2 Partition GUID code: 48465300-0000-11AA-AA11-00306543ECAC (Apple HFS/HFS+) Partition unique GUID: 8184AD94-2146-4A57-A1EB-A81B5BE61F44 First sector: 409640 (at 200.0 MiB) Last sector: 98065887 (at 46.8 GiB) Partition size: 97656248 sectors (46.6 GiB) Attribute flags: 0000000000000000 Partition name: 'Macintosh HD' Command (? for help): i Partition number (1-10): 3 Partition GUID code: 48465300-0000-11AA-AA11-00306543ECAC (Apple HFS/HFS+) Partition unique GUID: 7B350544-051D-426D-9281-F921018F2BE0 First sector: 98556832 (at 47.0 GiB) Last sector: 99826367 (at 47.6 GiB) Partition size: 1269536 sectors (619.9 MiB) Attribute flags: 0000000000000000 Partition name: 'Recovery HD'
`n`	new Partition number (11-128, default 11): First sector (34-625142414, default = 281176528) or {+-}size{KMGTP}: Last sector (281176528-282446071, default = 282446071) or {+-}size{KMGTP}: Current type is 'Apple HFS/HFS+' Hex code or GUID (L to show codes, Enter = AF00): Changed type of partition to 'Apple HFS/HFS+'
`b`	backup partition table which includes any changes made. Enter backup filename to save: /0_160310.gpt The operation has completed successfully. ls -l /0_160310.gpt rw-r--r-- 1 root wheel 17920 Mar 10 15:00 0_160310.gpt Invoke `Recovery & transformation` `menu` to restore
`c`	change name of partition (use diskutil rename) Partition number (1-11): 11 Enter name: cache need exclusive use of the DISK
`d`	delete partition
`o`	obliterate the Entire partition table!
`w`	write. use `v` first `quit`, Shutdown and boot a live CD or recovery partition. Use the partitioning utility that came with your operating system (diskutil for OS X) to view the revised partition table. Then shutdown and boot the system normally.
`r`	recovery & transformation menu
`x`	xpert menu (get into even more trouble than the main menu allows.)
`q`	quit, does NOT imply writing the table to disk.
`?`	display terse help rearranged ed p print the partition table i show detailed information on a partition b back up GPT data to a file n add a new partition c change a partition's name (use diskutil rename) d delete a partition v verify disk (partition table) o create a new empty GUID partition table (GPT) r recovery and transformation options (experts only) s sort partitions t change a partition's type code l list known partition types w write table to disk and exit x extra functionality (experts only) q quit without saving changes ? print this menu

From Command (main menu) via `r` Recovery/transformation command (? for help): ?
l	load partition data from a backup file Enter backupfilename to load:
c	load backup partition table from disk (rebuilding main) Waning! This will probally do weird things if you've converted an MBR to GPT form and haven't yet saved the GPT: Proceed? (Y/N)
`e`	load main partition table from disk (rebuilding backup) Waning! This will probally do weird things if you've converted an MBR to GPT form and haven't yet saved the GPT: Proceed? (Y/N)
`d`	use main GPT header (rebuilding backup) Be sure you are in Recovery/Transform menu as d is delete in main menu
`b`	use backup GPT header (rebuilding main)
`f`	load MBR and build fresh GPT from it
`g`	convert GPT into MBR and exit a toggle active/boot c recompute CHS values l set partition to logical o omit oartition p print quit without saving r set partition as pRimpary s sort MBR t change type w write and exit
`h`	make hybrid MBR WARNING! Hybrid MBRs are flaky and dangerous! If you decide not to use one, just hit the Enter keu at the below prompt and your MBR partition table will be untouched. Type from one to three GPT partitino numbers, seperated by spaces, to be added to the hybrid MBR, in sequence:
`t`	transform BSD disklabel partition
`o`	print protective MBR data Disk size is 625142448 sectors (298.1 GiB) MBR disk identifier: 0x00000000 MBR partitions: Number Boot Start Sector End Sector Status Code 1 1 625142447 primary 0xEE
`p`	print the partition table (same as from `Command`
`i`	show detailed information on a partition (same as from `Command`
`v`	verify disk (same as from `Command`
`w`	write table to disk and exit
`x`	extra functionality (experts only)
`?`	print this menu
`m`	return to main menu
`q`	quit without saving changes

Expert command (? for help): ? a set attributes c change partition GUID d display the sector alignment value l set the sector alignment value e relocate backup data structures to the end of the disk g change disk GUID h recompute CHS values in protective/hybrid MBR n create a new protective MBR sector 0, precedes the GPT, MBR contains one type 0xEE partition that spans the entire length of the disk. It protects GUID Partition Table disks from previously-released MBR disk tools such as Microsoft MS-DOS FDISK or Microsoft Windows NT Disk Administrator. s resize partition table t transpose two partition table entries u replicate partition table on new device z zap (destroy) GPT data structures and exit r recovery and transformation options (experts only) i show detailed information on a partition w write table to disk and exit v verify disk m return to main menu o print protective MBR data p print the partition table q quit without saving changes ? print this menu
`a`	set attributes Partition number (1-9): 1 attributes are: 0: system partition 1: hide from EFI 2: legacy BIOS bootable 60: read-only 62: hidden 63: do not automount Attribute value is 0000000000000000. Set fields are: No fields set Toggle which attribute field (0-63, 64 or to exit):
`n`	new
`l`	list partition TYPES 0700 Microsoft basic data 0c01 Microsoft reserved 2700 Windows RE 3000 ONIE boot 3001 ONIE config 3900 Plan 9 4100 PowerPC PReP boot 4200 Windows LDM data 4201 Windows LDM metadata 4202 Windows Storage Spac 7501 IBM GPFS 7f00 ChromeOS kernel 7f01 ChromeOS root 7f02 ChromeOS reserved 8200 Linux swap 8300 Linux filesystem 8301 Linux reserved 8302 Linux /home 8303 Linux x86 root (/) 8304 Linux x86-64 root (/ 8305 Linux ARM64 root (/) 8306 Linux /srv 8307 Linux ARM32 root (/) 8400 Intel Rapid Start 8e00 Linux LVM a500 FreeBSD disklabel a501 FreeBSD boot a502 FreeBSD swap a503 FreeBSD UFS a504 FreeBSD ZFS a505 FreeBSD Vinum/RAID a580 Midnight BSD data a581 Midnight BSD boot a582 Midnight BSD swap a583 Midnight BSD UFS a584 Midnight BSD ZFS a585 Midnight BSD Vinum a600 OpenBSD disklabel a800 Apple UFS a901 NetBSD swap a902 NetBSD FFS a903 NetBSD LFS a904 NetBSD concatenated a905 NetBSD encrypted a906 NetBSD RAID ab00 Recovery HD af00 Apple HFS/HFS+ af01 Apple RAID af02 Apple RAID offline af03 Apple label af04 AppleTV recovery af05 Apple Core Storage bc00 Acronis Secure Zone be00 Solaris boot bf00 Solaris root bf01 Solaris /usr & Mac Z bf02 Solaris swap bf03 Solaris backup bf04 Solaris /var bf05 Solaris /home bf06 Solaris alternate se bf07 Solaris Reserved 1 bf08 Solaris Reserved 2 bf09 Solaris Reserved 3 bf0a Solaris Reserved 4 bf0b Solaris Reserved 5 c001 HP-UX data c002 HP-UX service ea00 Freedesktop $BOOT eb00 Haiku BFS ed00 Sony system partitio ed01 Lenovo system partit ef00 EFI System ef01 MBR partition scheme ef02 BIOS boot partition f800 Ceph OSD f801 Ceph dm-crypt OSD f802 Ceph journal f803 Ceph dm-crypt journa f804 Ceph disk in creatio f805 Ceph dm-crypt disk i fb00 VMWare VMFS fb01 VMWare reserved fc00 VMWare kcore crash p fd00 Linux RAID

Thanks to Roderick W. Smith, Here's his documentation

See

gpt, diskutil