The GUID Partition Table (GPT) is a method of partitioning disks. It features up to 128 partitions by default and it uses 64-bit pointers, which means it fully supports disks of up to 8ZiB, as opposed to the 2TiB limit of the older Master Boot Record (MBR) partitioning scheme. GPT is most often used ...

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How to convert HDD from GPT partitioned to partitionless keeping BTRFS filesystem intact?

I have a 8TB Seagate Archive HDD partitioned with GPT: BTRFS filesystem (1TB approx), all the rest is now free. I would like to convert this HDD to partitionless (let BTRFS manage full drive) while ...
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175 views

How to remove the limit of a maximum of 16 partions at installation of 12.04 on GPT layout HDD

When I partition the HDD with Gparted (from 12.04 installation media), it encounters an error when trying to format partition named sda16. The error message reads: mkdosfs: Device partition expected, ...
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1k views

Unable to install Ubuntu 12.10 on windows 8 machine/ error no5

Installing crashes halfway through "Copying Files," showing an I/O device error error number 5. There was problem in beginning of installation too--Ubuntu was not detecting the installed Windows 8 ...
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31 views

How to convert MBR partition table to GPT?

I need to install Windows 10 alongside of Ubuntu, but partition table type is MBR, I tried to turn off UEFI mode, use legacy-mode but Windows still don't wont to be installed. (I heard of gdisk ...
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100 views

Wrong partition sizes (I think?)

I know just enough about Linux to mess things up, so apologies in advance. I have tried looking at some of the other threads here similar to this, but none of the answers seem to help. I have a 4TB ...
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150 views

Dual Boot Windows 8 - Ubuntu 14.04 with msdos partition table

I have a self-installed Windows 8 on a disk with a msdos partition table. I boot in UEFI, and I have a 350m partition with EFI file of Microsoft. 1. Is it really possible to boot in UEFI with a ...
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363 views

Unable to Install Ubuntu alongside Windows 7 (Legacy BIOS)

I am trying to install Ubuntu 12 / 14.04 (x86 & x64) alongside Windows 7. I have a bootable USB stick and when I try to install Ubuntu there is no alongside Window` option neither the Windows ...
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58 views

Problem Partitions Dual Boot

I was trying to install a dual boot in my PC (I have Windows 7 Installed Already), it does not recognize my partitions, I even left non allocated space and nothing, it saw it as a free disk. Then i ...
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770 views

Partitions Grub UEFI GPT MBR

I'm having a problem with the partitions in my system. Yesterday, I wanted to try Arch Linux, so I installed it in a new partition and in the process I was told, since my system is UEFI, I had to ...
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210 views

3TB partition disappeared by Windows 7

I am wondering if anyone can help me with a problem... I have a dual-boot Ubuntu and Windows 7 system. I bought a new 3TB HDD as I needed more storage space (the HDD is not used to boot the system). ...
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528 views

Dual boot Windows 8.1 Ubuntu EFI GPT: rEFInd won't start automatically

My machine is an HP DM1-4341sa netbook which came with Windows 8. I've since wiped the disk, changed the disk type to GPT and clean installed Windows 8.1 from ISO, leaving space at the end of the ...
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221 views

Installing 13.10 alongside preinstalled Windows 8

I followed this guide to a T: http://www.everydaylinuxuser.com/2013/09/install-ubuntu-linux-alongside-windows.html However, when I get to step 6, I just see my /dev/sda and it says it's completely ...
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4k views

Can't remove GPT data from MBR

I am having difficulty getting the Ubuntu installer (and gparted) to recognize the partitions on my MBR type disk. Other operating systems and disk tools read the disk structure and the files on it ...
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549 views

Ubuntu + Windows 8 -> Dell 14z 5423 AHCI / ISRT

I just bought a Dell 14z 5423, which uses UEFI/GPT and Intel Smart Response on the Windows 8. I have been researching and studying how to use it as Dual boot. Thanks to this forum I was able to ...
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1answer
2k views

Ubuntu 13.04 doesn't see my 2TB hard drive

I have a small problem. I switched today from Windows 7 to Ubuntu 13.04 on my home PC. I have installed 3 hard drives - 250GB, 500GB and a 2TB. On the 250GB I have installed the system - clean ...
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alignment on disk

testDisk 6.14, Data Recovery Utility, July 2013 Christophe GRENIER <grenier@cgsecurity.org> http://www.cgsecurity.org Disk /dev/sda - 1000 GB / 931 GiB - > CHS 121601 255 63 Current ...
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26 views

Change mbr partation to gpt

I already have install ubuntu and now i want to insatll windows 8.1 over it. But while doing this this shows the problem that you should have gpt partaion. So i have to make this parataion from ubuntu ...
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34 views

What exactly is written to disk with an LVM basic install on 1T drive?

I need to reverse an LVM install to an Intel MAC 1T disk, if possible. Even if it's not possible, I still want to know what exactly is written to the disk after pvcreate, vgcreate and lvcreate are ...
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38 views

GPT accidentaly overwrote by MBR in non-native USB SATA dock

Sorry if I miss some solution, but I can't find issue like my one, especially looking into gpart status in answers. What I have got: Seagate 4000GB 3,5" drive ST4000DM000 Probably shipped as ...
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75 views

Recover GPT partitions or partition table

I was partitioning a GPT hard disk using Gparted. I have deleted the Windows recovery partition successfully and merged that unallocated space to another unallocated space which was previously ...
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1answer
35 views

problem deleting MBR data and GPT data

I am trying to install Ubuntu alongside windows 8 for the first time so I know nothing about Ubuntu and I deleted what so-called MBR or GPT data or both using Ubuntu live by typing (sudo gdisk /dev/...
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313 views

Location of grub on gpt partition

As far as i undersood the grub program is located fully in the efi partition if i have gpt partition scheme instead just as a link like it was in the older mbr. So now if i remove linux partition will ...
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473 views

EFI/GPT system partion with bootable RAID 1 system installation

I've used the ubuntu server installation image to install onto a RAID 1, which is two disks mirrored for redundancy. My configuration is as follows: /dev/sda - 500GB /dev/sda1 - 1GB, EFI system ...
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1answer
127 views

Kubuntu 14.04 installer does not recognise partitions on hard disk with GPT

For a friend I'm repairing a computer so I have a brand new hard drive lying around. I've found documentation that Linux is capable of booting from a hard drive even if the computer is not UEFI ...
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509 views

The CRC for the main partition and back up partition table are invalid

I've been having problems with my HDD since I tried dual booting ubuntu 14.04 with windows 8.1. When I was installing from the ubuntu installer I was receiving "input/output error during write on /dev/...
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2k views

Cannot mount GPT Windows partition

I had a Windows 7 machine with 167GB. I wanted to install Ubuntu on it, so I shrank the partition into 111GB and 56GB. Afterwards I installed Ubuntu 14.10 32-bit in the newly created 56GB partition. ...
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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. ...
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22 views

Windows corrupts primary GPT table

I have an external hard disk that I share between my Linux laptop and my Windows 10 desktop. The disk has a GPT table, with a NTFS partition and a partition encrypted with Truecrypt. The disk works ...
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873 views

How to restore a LUKS partition?

My /home partition disappeared on my main HDD. I changed SATA slots, then I got strange "no lvm available" errors during boot when usually the password would be entered (I do not have any lvm setup at ...
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20 views

How to partman/preseed with GPT

I need to make partitions of a server which has a 3TB HDD. This partitions must be done using preseed file(automatic). I've been searching but I can't clearly understand how partman works in the ...
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114 views

Dual Boot Windows 10 & Ubuntu 14.04 MBR & GPT Partition Table problems

I have a Windows 10 and Ubuntu 14.04 dual boot system. I am a novice at Ubuntu but managed to get the dual boot up and running reliably. I am now trying to add a 3TB HD and partition it for use by ...
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JMicron JM20339 USB SATA Controller Problem

I Have 3bon-s35s SATA to USB converter(or controller). It use JMicron JM20339 chipset. Windows 7 can recognize WD 4TB HDD, but Ubuntu dosen't. dmesg shows below [ 2.990457] scsi 6:0:0:0: Direct-...
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Windows 8.1 Dual Boot Ubuntu 14.04 - dmraid and fixpart

I'm trying to install Ubuntu 4.14 on dual boot with Windows 8.1, but when beginning the LiveUSB the Ubuntum, the partitions created by Windows 8.1 are not recognized, reports that all is HD as ...
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173 views

How to re-create the partition table?

I accidentally dd the first 512 bytes using dd if=/dev/zero of=/dev/sdb bs=512 count=1 and the partition table is now gone. Is there ANY way to re-create the partition table(/dev/sdb). My hard ...
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179 views

Problem with the installation on ubuntu 14.04 LTS

I had a computer running Windows7 and wanted to change to Ubuntu. So I installed the 14.04 LTS version and all seemed to have gone cool. (I'd like to make clear that I want just Ubuntu in the ...
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inconsistency in showing disk label

I've got my new laptop (thinkpad 440p) with windows 7.1 pre-installed and wanted to have single-boot ubuntu 14.04 on it. I wanted to change the disk partition table to "msdos" (legacy), so I change ...
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9 views

“No root file system is detected”

I'm trying to configure some GPT partitions using preseed/partman. This is what I've got: d-i partman-lvm/device_remove_lvm boolean true d-i partman-md/device_remove_md boolean true d-i partman-...
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22 views

Does installing ubuntu in uefi mode automatically convert the hdd from mbr to gpt?

I had windows 7 previously installed on my pc. I don't have an external hdd. So to save my data I created a normal partition and installed ubuntu 14.04 on it. Later on I formatted the windows ...
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Problem installing Ubuntu Studio from thumb drive to a GT80S Titan with 950 Pros in RAID 0

I used Rufus to write a bootable USB Drive. Rufus configuration: As for "Partition scheme and target system types": I both tried "I tried both the MBR partition scheme for BIOS or UEFI" and "GPT ...
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93 views

working 14.04 ubuntu to error: no such device: grub rescue>

I'm a father and I was trying to get one more entry on gnucash after my youngest woke up. I had gnucash, keypass, chrome and LibreOffice calc up when my son found the power button.... Nooooooo! :D ...
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30 views

Disk partition type changed to GPT after crash, need to recover

I need some help recovering a lost partition on my fileserver. I run a virtualized Ubuntu 14.4 (under Vsphere 6) with a lot of disks (7 assigned to the server). Last week, my power supply crashed. ...
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7 views

stop TD checking for HFS partition

what does this stupid prompt mean question does not meet quality standards? I am really confused. Trying again. i ran testdisk and because it is a 3tb disk I choose GPT partition. Im thinking i ...
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32 views

how to repair grub2 on a gpt partition

I've broken grub (don't know how, maybe resizing the main partition) and tried to fix it through grub-install, currently though booting gives me an init error and drops me in a basic shell. I've run ...
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102 views

recover from 'sgdisk --zap /dev/sda' (destroy GPT structures but leave MBR intact)

I just wanted to converted an old computer to an image using Clonezilla disk-to-image, but it failed because of something about GPT and MBR partition tables. But the disk contained only an install of ...
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Can I have a GPT partitioned SSD and an MBR partitioned HDD on the same device?

The title pretty sums it up though I am not sure if it is a valid question. And if not, can the HDD be GPT partitioned with already existing encrypted partitions?
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Install Ubuntu 14.04 after Windows 7, 2 seperate disks, searched a lot but problem unsolved

My Thinkpad has two disks, 1 gpt ssd + 1 mbr hdd. My main OS is Windows 7, which is installed in the ssd (120GB, nearly full). Now I want to install Ubuntu 14 to the hdd, I searched a lot, I tried ...
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64 views

Trouble when trying to install Ubuntu in dual boot with windows 8.1

I used to work in a dual boot system (w10 & Ubuntu). I was just trying Ubuntu back then, but I liked it so much that I wanted more space in the hard drive for it so I installed w8.1 in a 500Gb ...
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68 views

copy partition table on raid1 restore to the wrong disk

My computer had a broken disk (SMART warnings). Before I had no raid1. I created one following this tutorial: https://www.howtoforge.com/how-to-set-up-software-raid1-on-a-running-lvm-system-incl-grub2-...
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80 views

Suspected broken partition table

My machine is running Ubuntu 15.04 (amd64). I have two SSDs for the OS in hardware RAID1, and two 3TB rotary drives in fake RAID1 which hosts my encrypted home directory. This evening I was ...
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Ubuntu 15.04 died when win 10 installed new boot sector

I have a gpt format disk uefi bios. I had ubuntu 15.04 and Windows 8.1 dual booting fine. Windows 8.1 would not install security updates unlessI also installed Wondows 10. Linux vanished and cannot ...