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Questions tagged [gdisk]

Questions related to gdisk which is a set of text-mode partitioning tools for Linux and other operating systems.

39 questions
17
votes
2 answers

GDisk Hex Codes

During the use of gdisk, there an option to specify the hex code. I want to know what it is and why it's needed, see below. So for example, if I am creating a software RAID on my drive, I assume I need code fd00. But why? What is it, and do I have…
john smith
  • 3,161
5
votes
2 answers

how to truncate a disk image file of unused space without corrupting GPT partition table (end pointer)

Lots of info on taking a image of a disk and shrinking the root (bionic) filesystem partition and then truncating the image to remove the part that became free space. Like https://softwarebakery.com//shrinking-images-on-linux So there are…
DKebler
  • 193
3
votes
1 answer

Startup USB drive made with "Startup Disk Creator" is reported to have multiple issue with its GPT

I created a startup USB drive with Startup Disk Creator from 18.04.1 image and successfully used it to install Ubuntu. Then I decided to inspect it with GPT fdisk, and gdisk reported "invalid main GPT header" and other issues: § sudo gdisk…
Alexey
  • 793
2
votes
1 answer

gdisk Warning: Secondary partition table overlaps the last partition by 33 blocks!

I’m going to change MBR to GPT using gdisk but when I type: sudo gdisk /dev/sda I have a warning tell me: Warning! Secondary partition table overlaps the last partition by 33 blocks! You will need to delete this partition or resize it in another…
Arthur Bernardo
  • 21
2
votes
0 answers

Ubuntu 16 RAID5 running but primary GPT table is corrupt on 3 of 4 drives

RAID5 is operating but GPT has CRC error and/or is corrupt (depending on who give the error message). I have read all of the helps I can find on this and I did what they said and it worked... once only. But for the other 3 disks in the RAID, I…
Micheal Morrow
  • 21
2
votes
0 answers

GPT ext4 partition recovery - invalid backup header

When I run from a LiveCD to try to recover a non-booting system, I run gdisk /dev/sda and get Caution: invalid backup GPT header, but valid main header; regenerating backup header from main header. so I think I'm supposed to do r then e but when I…
batflaps
  • 121
2
votes
2 answers

Converting flash drive From GPT to MBR

I am having a strange issue on Ubuntu 22.04, and can't find any helpful information on it. I have a 16GB USB flash drive. I want to use it with OPL on my Playstation 2 and this requires the partition table to be MBR. The Disks app in Ubuntu tells me…
Jonathan Fews
  • 23
1
vote
0 answers

Ubuntu 16.04.3 LTS: UEFI install. Resized GPT partition and now can't boot

Before I did the resize, I had 3 partitions: root@panda1:/mnt1# gdisk /dev/sdb GPT fdisk (gdisk) version 1.0.1 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using…
chiwal
  • 31
1
vote
0 answers

NTFS mounting problem

I am trying to mount my old windows hdd with ntfs filesystem. The hdd was partitioned in 3 partitions. /dev/sdb1 * 2048 206847 204800 100M 7 HPFS/NTFS/exFAT /dev/sdb2 206848 614402047 614195200 292,9G7…
Norovis
  • 11
1
vote
1 answer

Error message on 5TB Harddisk: Partition 1 does not start on physical sector boundary

I bought a Wester Digital Green 5TB harddisk and have difficulties to format it. fdisk -l shows the following message: WARNING: GPT (GUID Partition Table) detected on '/dev/sde'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sde:…
Wolfgang
  • 13
1
vote
0 answers

Discrepancy from fdisk while resizing an ISO image

I have an ISO image that I created using Clonezilla from an NTFS (Windows-based) disk. It is 455 GiB in size, but only 32 GiB of which are used. So, I thought I could resize it. I followed the instructions given here. Most of it was fine, except…
Ray
  • 2,200
1
vote
2 answers

I need 2 create a partition on my USB flash drive with block/cluster size of 256 KB, but cant find the dialog box 2 specify this block size in Disks

I'm using Gnome's Disks program 2 format my USB flash drive. I want only 1, 0700 Microsoft basic data partition, covering the whole disk. The disk will be used to transfer 2-8GB video files between Windows and Linux computers. I want exFAT file…
michal roesler
  • 259
  • 4
  • 14
1
vote
1 answer

Will gdisk or sgdisk commands delete my data? (mdadm e-mail alert)

I currently try to fix my mdadm /dev/md0 raid5 partition. I was informed via e-mail notification from mdadm e-mail alerts that there is a fail event and a DegradedArray event. I found this as a possible solution to the probblem of mine:…
befaro
  • 13
  • 3
1
vote
0 answers

gdisk MBR and GPT damaged

I'm trying to clone my SSD into a bigger one using CloneZilla, but I got a problem saying that my disk contains mismatched gpt and mbr partition. I tried the gdisk command to see what is wrong in there and I got the following output: :~$ sudo gdisk…
Maystro
  • 111
1
vote
0 answers

Restoring a partition table using gdisk output

I seem to have messed up the partition table of my mobile phone, and I was wondering whether I can recreate it from the gdisk output that I still have, using the Ubuntu installation on my laptop. This is the output of gdisk -l /dev/sdb before things…
Pthagonal
  • 11
1
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