gdisk

List partitions

$ sudo gdisk [[-l|--list]]

$ sudo gdisk [/dev/sdX]

$ <?>

$ <p>

$ <n>

$ <d>

$ <w>

$ <q>

gdisk [-C newalignments] [-F] [-f firstalign] ... device

-C, --set-alignment=NEWALIGN
    Change default alignment boundary (sectors)

-F, --fix
    Force disk scan and fix issues

-f, --first-aligned=SECTORS
    Align first partition to specified sectors

-g, --mbrtogpt
    Convert MBR to GPT (destructive)

-G, --randomize-guids
    Randomize disk and partition GUIDs

-h, --help
    Display help and exit

-i, --show-mbr
    Show MBR partitioning details

-l, --list-types
    List partition types and exit

-L, --label=DISK-LABEL
    Set disk label

-m, --transform-mbr=MBR-TYPE
    Transform MBR to specified type

-n, --new=PARTNUM[:FIRSTSECTOR[+SIZE]]
    Recover GPT from backup

-o, --use-zeros
    Use zeroed main header copy

-P, --attributes=ATTRS
    Change partition attributes

-r, --use-raid
    Set RAID metadata

-R, --recompute-chs
    Recalculate CHS values

-s, --size=SIZELIMIT
    Set device size limit (sectors)

-S, --sectors=NUMSECTORS
    First usable LBA

-t, --typecode=TYPECODE
    Set partition type

-u, --partition-guid=GUID
    Set partition GUID

-U, --disk-guid=GUID
    Set disk GUID

-V, --verify
    Verify disk and exit

-v, --version
    Show version and exit

-x, --expert
    Enable expert mode

-X, --extra-args
    Extra arguments for scripts

-z, --zap
    Zap (clear) MBR and GPT data

-Z, --zap-all
    Zap all partition table data

gdisk is a menu-driven utility for manipulating GPT (GUID Partition Table) partition tables on disks. Part of the GPT fdisk suite, it excels with modern large disks (>2TiB), UEFI systems, and supports up to 128 primary partitions per disk, unlike legacy MBR tools like fdisk.

It offers an interactive interface for creating, deleting, resizing, moving partitions; setting types, names, GUIDs, attributes (e.g., bootable, hidden); verifying tables; converting MBR to GPT; and recovery options. gdisk detects and repairs corruption, aligns partitions optimally (usually 1MiB), and handles hybrid MBR setups.

Key advantages: non-destructive edits until write, expert mode for advanced features, scripting via sgdisk. Run as root on block devices (e.g., /dev/sda). Always back up data first, as errors can cause irrecoverable loss. Ideal for Linux, but cross-platform.

Extremely dangerous: modifies disk directly, risking total data loss.
Run as root only on correct device.
Backup GPT data first with -b. Not for MBR-only disks without conversion.
UEFI requires <2.2TiB ESP partition.

Launches menu: new, delete, print, type, label, verify, write, quit. Expert mode (x) unlocks advanced ops like GUID edits.

Use hex codes or aliases (e.g., af00 for Linux filesystem, ef00 for EFI). List with -l or l in menu.

Alternate headers for redundancy. Use r > e > recover to load backup copies.

Developed by Roderick W. Smith in 2009 as part of GPT fdisk suite to address MBR limitations. Supports GPT since EFI/UEFI era; actively maintained, latest versions handle modern filesystems, NVMe.

sgdisk(8), cgdisk(8), fixparts(8), fdisk(8), parted(8)