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 can I change/convert a Ubuntu MBR drive to a GPT, and make Ubuntu boot from EFI?

I recently have upgraded my PC, my new Motherboard (ASUS M5A99X EVO) uses UEFi instead of the regular MBR option. I have a Ubuntu 11.10 installation that I did when I had my previous hardware (MSI MS ...
15
votes
1answer
4k views

Can't boot into Windows 7 EFI GPT after recovery operation

My question, or rather issue, is in the extent of this previous case in which I wanted to grow my Linux (ext4) partition. The partition /dev/sda6 was in the way of doing this and since it contained ...
14
votes
2answers
15k views

Mount exited with exit code 13

I have a 1TB external hard drive that I recently formatted to NTFS. It was mounting on my Ubuntu 11.10 fine until just now. I didn't make any changes to affect my OS or my exhdd. The error that I get ...
11
votes
2answers
3k views

Why does the first partition start at sector 34 when I choose “Guided - Use entire disk” during install?

After choosing "Guided - Use entire disk" during installation of Ubunsut Server 12.04 I find that the first partition starts on sector 34. Why that specific sector and not the first one? (parted) ...
9
votes
1answer
22k views

Is it safe to format msftres, msftdata and hidden partitions?

I have an acer V7 which came with a 1TB HDD, 24GB SSD and Windows 8 installed. I have installed Ubuntu onto the SSD and formatted the main partitions of the HDD. However, I also notice 3 other ...
9
votes
1answer
40k views

Proper alignment of partitions on an Advanced Format HDD using Parted

First I create a properly aligned partition in a new GPT table using parted by specifying percentages for start and end of the partition: # parted -a optimal /dev/sdb GNU Parted 2.3 Using /dev/sdb ...
9
votes
1answer
25k views

How can I check and change the partition table type?

New computers that ship with Windows 8 also come with a different partition table than before. This along with the move to UEFI causes confusion, as users are unaware of the newer partition table and ...
8
votes
4answers
52k views

How to remove GPT from HDD?

I have a Asus K55VM-Sx027V laptop and I formated it with Ubuntu because whenever I tried to install Windows 7 64bit, it wouldn't let me because my HDD had GPT protection. Now that I have Ubuntu ...
7
votes
4answers
33k views

GPT partition table warning message during install of ubuntu

/dev/sda contains GPT signatures indicating that it has a GPT table. However, it has a fake msdos partition table as it should. Perhaps it was corrupted? Is this a GPT partition table? So, that's the ...
7
votes
3answers
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How do I create a multiboot environment using LVM for your *buntu operating systems on a GPT formatted system drive, in a UEFI based system?

My reason for using LVM is that I reinstall, upgrade and generally mess around with my OS installs so much that I have found that LVM gives me fantastic flexibility in moving, expanding, cloning and ...
6
votes
1answer
3k views

No USB Devices picked up on restart to windows 7 from ubuntu

I have dual boot windows 7 and ubuntu 13.10 on efi Dell Inspiron 14z 5423 ultrabook. My devices are recognized well in Ubuntu. If I reboot the system (i,e switch from Ubuntu to Windows 7) and start ...
6
votes
1answer
653 views

Install 11.10 on GPT with separate /home partition

I'm trying to install ubuntu / mint on my lenovo 570. Since it's better to use GPT, i'm trying to use that. I get these problems, either some partitions are misalligned, GRUB doesn't install or it ...
5
votes
2answers
17k views

Can't format or delete partitions in pendirve cause of gpt table error

This is what I got while trying to format a partition in my pendirve: Error deleting partition /dev/sdb1: Command-line `parted --script "/dev/sdb" "rm 1"' exited with non-zero exit status 1: Warning: ...
5
votes
1answer
18k views

How to install linux on a computer with GPT?

I recently installed Windows 7 on a computer. Left a partition to install linux. Today when I tried to install linux, the installer (of two distros that I tried) failed to recognise the already ...
5
votes
2answers
12k views

Ubuntu 14.04 single-boot with UEFI-mode enabled

I recently purchased a Dell Vostro 5470 with a pre-installed Windows 8 OEM on a HDD 500GB. Now I'm trying to replace the HDD with a Sandisk SSD 240GB as my main disk (next step will be use the HDD ...
4
votes
2answers
870 views

How can I set up GPT and EFI for my new raw drive?

My laptop Thinkpad T400 now runs 12.04 on a small hard drive. I plan to replace the hard drive with a bigger one, and install 14.04 on the new drive. The new drive is just bought as brand new, and raw ...
4
votes
1answer
4k views

EFI Partition vs /boot in UEFI System

I have a HDD Momentus Thin (500GB) + mSATA Samsung (32GB) and I intend to install Ubuntu 13.04 in a UEFI - GPT - Secure Boot - Linux only System. I'll set the "/" (root partition) to use the whole ...
3
votes
2answers
5k views

GPT vs MBR. Why not MBR?

I am a Linux user. I don't have Windows on my laptop. Also the hard drive size is less than 2 TB. Then why should I use GPT tables? Can't I go with old fasioned MBR? I will be having two root ...
3
votes
3answers
30k views

Why do I need to create a bios-grub partition when I install 12.04?

Is the bios-grub partition in Ubuntu 12.04 mandatory? I have used 11.04, 11.10 and 12.04, But I was never asked for this. Today I tried a fresh installation of Ubuntu 12.04 and for the first time ...
3
votes
1answer
645 views

How to get data off a Windows partition when “primary GPT table is corrupt, but the backup appears OK”

Was running Windows 8.1 on my Asus Laptop (U37VC). Blue screen; error 0xc000000e. Figure I've screwed up the boot somehow (some hard reboots lately after annoying lags). After disabling the boot ...
3
votes
2answers
828 views

GPT PMBR size mismatch after dd clone

I am migrating my Ubuntu EFI boot system to a larger hdd. I used the command dd if=/dev/sdb of=/dev/sda I did not dismount the inputfile before copying and the outputfile was fresh unpartitioned ...
3
votes
2answers
24k views

UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD)

UEFI Dual-Boot - Ubuntu 12.04.3 + Windows 8.1 (One GPT HDD) Hello, I'm having trouble setting up a dual-boot (Ubuntu 12.04 LTS and Windows 8.1) in my ASUS K55VM laptop's hard drive disk (500 GB). I ...
3
votes
5answers
12k views

Installing Ubuntu 12.04 on EFI system

Fellas, need help. Trying to install Ubuntu 12.04 on laptop to dual boot alongside Win7. I have UEFI and GPT partitioning scheme. It has optional Legacy boot mode though. I can boot from Ubuntu USB/CD ...
3
votes
1answer
107 views

How can I change a drive's partition table from MBR to gpt without losing an NTFS partition at the end of the drive?

Long story short, I have an external USB hard drive formatted using a MBR partition table, and I want to install Ubuntu in UEFI mode in a ~23.40 GB unallocated space before a ~442.33 GB NTFS partition ...
3
votes
1answer
3k views

Unable to install Ubuntu 14.04 LTS on Sony VAIO T-Series laptop

I have a Sony VAIO T-Series (SVT15117CDS) laptop that came pre-installed with Windows 8. After having the computer for a while, I updated it to Windows 8.1. I now want to put Ubuntu 14.04 LTS onto the ...
3
votes
5answers
12k views

Ubuntu 12.04 installer does not recognize Windows 7

I recently purchased an ASUS N56VZ-ES71 laptop which came with Windows 7 Home Premium installed on it. I wish to dual boot Windows 7 and Ubuntu 12.04 on it. I shrank the hard drive partitions to leave ...
3
votes
1answer
3k views

Comprehensive guide to install Ubuntu 12.10 x64 after Windows 7 on UEFI and GPT disk [closed]

My laptop is currently running Windows 7 64-bit on a GPT disk. Instead of BIOS, the laptop also uses UEFI. After googling around, I cannot find any guide for this problem (maybe my googling skill is ...
3
votes
2answers
7k views

Can't boot a live usb .iso in UEFI mode on Lenovo Edge-15 laptop

I was trying to install Gentoo on my laptop Lenovo Edge-15, but I'm having problems booting a live usb .iso in UEFI mode. I then tried to install Ubuntu, Arch, and Fedora, and seem to be having the ...
2
votes
2answers
23k views

How to fix MBR partition prior to Ubuntu Installation? A partition overlaps GPT backup sectors

My main problem is that i have just acquired an ASUS laptop with WINDOWS 7 and I want to install Ubuntu on it. I want to have a dual boot to choose between both Operating systems, I read that it's ...
2
votes
1answer
5k views

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted

I've just installed Ubuntu on a new SSD along with a HDD for data. Strangely, when I divided partitions at install, 1MB of non-removable free space was reserved at the beginning of each disk. I ...
2
votes
3answers
2k views

how to factory reset a usb?

How do you factory reset a usb? I have a hp 4gb usb that seems like it has a messed up partition table and ubuntu isn't recognizing all the space. I've tried formatting it in disks. That doesn't ...
2
votes
1answer
5k views

GParted claims whole hard drive is unallocated and gives warning about GPT table

For months I have been happily using my 3TB hard drive, and I still do. Today I discovered that GParted shows the whole drive (/dev/sdb) as being unallocated. The drive works fine though. Clicking for ...
2
votes
1answer
8k views

GParted and Ubuntu installer does not recognize Windows partition, but Ubuntu does

So, I'm trying to set up a dual-boot of Windows 7 Ult 64-bit with Ubuntu on my computer. The computer has UEFI firmware and originally came with Win 8. It has a 16GB SSD and a 1TB HDD. I intend for ...
2
votes
2answers
1k views

3TB HDD and legacy BIOS

I have new 3TB HDD and motherboard with legacy BIOS. To take advantage of full HDD capacity I have to use GPT partition table. I want to dual-boot Windows 8.1 and Ubuntu 13.10 (64-bit) from this HDD. ...
2
votes
1answer
91 views

Is GPT BIOS partition is really needed?

I have notebook with GPT partition format, EFI, LUKS, LVM, 64bit system and everything works perfectly. I wasn't created GPT BIOS partition. Now I want to test some Ubuntu features on virtual machine, ...
2
votes
3answers
8k views

How to install Ubuntu on an (U)EFI device with existing GPT?

I had Ubuntu 11.04 running till now. Now I want to reinstall Ubuntu with nearly fresh 12.04. I had much trouble last time to install Ubuntu because of EFI. Yet somehow I somehow got it running. But I ...
2
votes
1answer
6k views

How to install Grub2 on Macbook Pro with the grub-install command without warning about “blocklists” requiring the use of --force?

I have a Macbook Pro 5,2 and I've had a sporadic problem with having to reinstall GRUB after a system update. This has happened with several of the recent versions of Ubuntu, although I don't have an ...
2
votes
1answer
1k views

GPTsync mismatch problem

I have a hybrid disk. After trying to copy some files from another disk to this one, I lost my OSX and Ubuntu boot capability. Ran gptsync and got: Current GPT partition table: # Start LBA ...
2
votes
5answers
5k views

How do I install Ubuntu 12 on a 64bit PC with UEFI and GPT SSD disk, with no current OS?

How do I install Ubuntu 12 on a new 64bit PC which has UEFI instead of BIOS and a GPT formatted SSD disk, with no current OS ? I have already tried and although it seemed to install, it would not ...
2
votes
2answers
3k views

Dual Boot Installing Ubuntu 12.04 with Windows 7 (64) on a non UEFI system

I cannot seem to install the correct boot loader for a non-UEFI firmware system. I'm trying to install Ubuntu 12.04 and Windows 7 (64) which are technically compatible with GPT but for windows only if ...
2
votes
2answers
322 views

Windows 8 installer complains about MBR partitions, but I don't see any?

I would like to install Windows 8 on my iMac (mid 2010 model). Currently the main OS on the iMac is Ubuntu 14.04. Using gparted I created an NTFS partition in preparation to install Windows 8 on it. ...
2
votes
3answers
4k views

Create GUID partition table (GPT) during Ubuntu Server install

On a computer with a new empty hard drive of capacity < 2 TB, I install Ubuntu Server with the standard text-mode installer. I choose to manually partition the disk. Then I can create a new empty ...
2
votes
1answer
169 views

Ubuntu / Windows 7/8 boot issue

I installed a dual boot Windows 7/8 on my laptop and now I also added a Ubuntu 14.04.1. To install Ubuntu I did an efi partition on sda1, a swap partition (sda6) and root (sda7) After the ...
2
votes
1answer
5k views

Unable to mount a partition of external 3TB hard drive..GPT warning

My external HDD has five partitions and I am able to mount 4 partitions except one (labeled office) which is of 1TB and has all my backups. I am providing more information below fdisk -l Disk ...
2
votes
1answer
2k views

Completely messed up grub/efi/gpt dual boot

I seem to have almost entirely screwed up my machine. I was attempting to install an ubuntu liveusb to my external hdd, but in the process I messed up my internal setup. The external one works ;) ...
2
votes
1answer
8k views

grub error: out of disk when booting 12.04 server with hardware RAID5 and gpt

I'm trying to do a new install of 12.04 server on one node of a Dell PowerEdge C6145 with the following spec: 48 cores 512GB RAM LSI MegaRAID 9265 controller 4x2TB disks, configured with RAID5 giving ...
2
votes
1answer
597 views

Dual boot 10.04 and Windows 7

Before downvote, please this is not a duplicate I read the related questions and couldn't solve my problem. I bought a new laptop that originally had Win8 installed, I formatted it, installed Windows ...
2
votes
1answer
4k views

Hard drive disk displayed as 2.2 TB despite being bigger in reality

I've added a new 3TB hdd to my Ubuntu Server 12.04 system for media (already has another drive for the OS), but it's only showing 2.2TB capacity df -H gives /dev/sdb1 2.2T ...
2
votes
2answers
3k views

EFI - GPT dual-boot quantal AMD64 - impossible boot windows 7

I tried to install Ubuntu Quantal AM64 on a EFI - GPT notebook (asus X501U) in dualboot. Ubuntu works fine, but i can't boot windows anymore. HDD is partitioned in this way: sda1 0.2 Gb ...
2
votes
1answer
165 views

Partitions mixing up

I am trying to install ubuntu alongside my windows 7. The problem is that ubuntu is not detecting all of my partitions and basically clubs together many of them. The same thing is done by using ...