gdisk

What it does

How to write it

gdisk [-l] DEVICE

Main parts

?

Help.

p

Print the table.

n

New partition.

d

Delete a partition.

t

Change the type code.

l

List the type codes.

c

Change a partition name.

i

Details of a partition.

o

New empty GPT table.

r

Recovery and transformation menu (rebuild, convert).

x

Expert menu.

v

Verify.

w

Write and quit.

q

Quit without saving.

Most used

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$ run as a normal user# run as root (or with sudo)

1. 1Install gdisk

   #dnf install -y gdisk

   In the BaseOS repository.

2. 2List a GPT table

   #gdisk -l /dev/vdb

   Shows the type codes and names.

3. 3Create a Linux LVM partition

   #gdisk /dev/vdb
   Command (? for help): n
   Hex code or GUID (L to show codes, Enter = 8300): 8e00
   Command (? for help): w

   8e00 = Linux LVM.

4. 4Swap partition type

   #gdisk /dev/vdb
   Hex code or GUID (L to show codes, Enter = 8300): 8200

   8200 = Linux swap.

5. 5Name a partition

   #gdisk /dev/vdb
   Command (? for help): c

   GPT partitions can have names (PARTLABEL).

6. 6Verify a disk

   #gdisk /dev/vdb
   Command (? for help): v

   Finds problems in the table.

7. 7Repair a damaged main table from the backup

   #gdisk /dev/vdb
   Command (? for help): r
   Recovery/transformation command (? for help): b

   Uses the backup header at the end of the disk.

8. 8Convert MBR to GPT (keep data)

   #gdisk /dev/vdc

   gdisk offers the conversion when it finds MBR; write with w. Back up first.

9. 9Script with sgdisk

   #sgdisk -n 1:0:+2G -t 1:8300 -c 1:data /dev/vdb

   One partition of 2 GiB, Linux type, name data.

10. 10Back up the GPT table

    #sgdisk --backup=/root/vdb-gpt.bin /dev/vdb

    Restore with sgdisk --load-backup=.

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Exit codes