Questions tagged [mbr]

master boot record (MBR)

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Convert from EFI to BIOS boot mode

I have a Samsung Notebook NP900X4C with an LUKS encrypted installation on it. The system is booting in UEFI mode. The problem is that the samsung-notebook kernel module is disabled in UEFI mode and ...
Lukas F.'s user avatar
  • 321
48 votes
3 answers
155k 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 ...
daltonfury42's user avatar
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25 votes
1 answer
103k 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 ...
LiveWireBT's user avatar
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8 votes
5 answers
101k views

How to fix the MBR for Windows 7?

I have installed Ubuntu as dualboot with Windows 7. Now I'm no longer using Ubuntu so i removed the Ubuntu partition and added the unallocated space to my Windows 7 partition. But after I restart my ...
Phoenix's user avatar
  • 83
7 votes
5 answers
8k views

How to uninstall Ubuntu from dual boot and change the bootloader? [duplicate]

I have a Windows 7/Ubuntu 11.10 dual-boot setup, where I am running the OSes on separate partitions on my laptop's HDD. I assume the best method of uninstalling is "simply" a matter of ...
MartinDK's user avatar
  • 103
16 votes
6 answers
212k views

How to boot into Windows 7 when grub is installed in the Windows partition?

Original title: How can i solve (un)booting windows 7 on the same partition with grub? I've been researching this problem for two to three days but I have came up empty. Basically, partition 1 is ...
Sim's user avatar
  • 163
121 votes
2 answers
98k views

What do I select for "GRUB install devices" after an update?

After running Update Manager, a debconf window (titled "Configuring grub-pc"), popped up, requiring me to select the appropriateGRUB install devices for my system. I've made no changes to grub or ...
belacqua's user avatar
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12 votes
2 answers
83k views

How to manually fix a partition table ?

I recently had trouble with the MBR/partition table on my laptop. I managed to rebuild the partition table using testdisk, and install GRUB to get it booting properly again (I'm using a dual-boot with ...
jwaddell's user avatar
  • 263
13 votes
6 answers
155k views

GRUB menu not showing with dual-boot UEFI mode installation

Previously I had Dell Inspiron Laptop with Legacy Boot and MBR disk partitioning with pre-installed Ubuntu 12.04. I needed dual boot with Windows. So I formatted it completely using Live USB, ...
user avatar
2 votes
2 answers
13k views

How do I install 12.10 on a Pavilion-G6 laptop with UEFI

I have a brand new HP Pavilion-G6 which boots to pre-loaded Windows8 and I want to change the machine to boot up into Ubuntu 12.10 whist retaining Windows 8. I am having difficulty booting into ...
Morris's user avatar
  • 83
25 votes
1 answer
102k views

Is separate EFI boot partition required?

In the past with BIOS, I've never created a separate partition for the bootloader. My question is, if i wish to use UEFI, is a separate boot partition a requirement? PS, I've tried without and it ...
olfek's user avatar
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8 votes
3 answers
35k views

Windows missing from GRUB menu [duplicate]

When I turn on the computer, I can see the GRUB and boot into Ubuntu. But I can't boot into Windows because I don't see it in the GRUB. I have tried both boot-repair and sudo update-grub to no avail. ...
user142605's user avatar
5 votes
3 answers
12k views

Motherboard replaced - How can I recover GRUB?

I had a dual boot setup on my Dell laptop with Ubuntu 16.04 and Windows 10. The tech replaced the motherboard and now I'm not able to boot. I am trying to restore GRUB - I installed a version of ...
Leo Simon's user avatar
  • 1,529
1 vote
2 answers
24k views

Unable to boot: Missing Operating system

I had installed Ubuntu 11.10 along with the another Ubuntu 11.10 which already installed on my netbook. Later I formatted the partition I newly installed. Next time when I boot it went to Grub Rescue ...
Vivek's user avatar
  • 335
10 votes
3 answers
66k views

Difference between Legacy BIOS and UEFI

Why are the terms MBR and GPT associated with Legacy BIOS and UEFI respectively?
burhanuddin abbas's user avatar
7 votes
2 answers
3k views

In Ubuntu ISO MBR, why does a GPT partition overlap the boot partition, and make MBR uneditable?

Question and context: In the MBR partition table of distros like for example ubuntu-16.04-desktop-amd64.iso, why does a GPT partition appear to overlap the primary boot partition? This seems to ...
Elliptical view's user avatar
10 votes
6 answers
24k views

How to avoid UEFI? Installation without UEFI? How to have Ubuntu 19, 20, 21, 22 w/o UEFI? Just no more EFI/UEFI problems?

I need to install Ubuntu 19 o. 20 o. 21 o. 22 on a quite recent machine. I enabled all compatibility and legacy modes in BIOS to avoid UEFI. (DO THAT FIRST!!!) I do not want to use UEFI. The ...
opinion_no9's user avatar
9 votes
2 answers
18k views

Unable to install GRUB

Unfortunately (as you can see) I cannot install grub. I have tried /dev/sda as well. Here is my partitioning schema: Troubleshooting + problems: Installed Windows 8 to logical partition (somehow ...
A T's user avatar
  • 2,528
3 votes
5 answers
6k views

GRUB boot into Windows 7 breaks GRUB and makes system unbootable

I have installed Ubuntu 12.04 (daily-live iso from 21.04.12) alongside Windows 7 on an HP EliteBook laptop. The installation went fine, except that it installed grub onto my usb disk (/dev/sdb) ...
Matthew East's user avatar
3 votes
2 answers
3k views

How to recover Ubuntu installed with Wubi with corrupted GRUB

I have ubuntu installed inside Windows 7 using Wubi. Yesterday, I tried installing Ubuntu using GRUB but it seem that GRUB was corrupted. To recover, I fixed the MBR using the Windows 7 CD. Now ...
user20110's user avatar
3 votes
2 answers
3k views

How do I take a backup of my Master Boot Record (MBR) and Partition Table (PT)?

I'd like to know how to: take a backup do a restore of all the MBRs and all the PTs of all my disks to a file so I can easily back them up using rsync or a comparable program.
Fabby's user avatar
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2 votes
2 answers
34k 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 ...
Keroak's user avatar
  • 131
2 votes
1 answer
5k views

Installing Lubuntu 20.04 with GPT and EFI

I had an existing installation of Lubuntu 18.04 which I wanted to upgrade to 20.04. Lubuntu docs say this requires a fresh install. My previous 18.04 installation was using GPT and EFI. During ...
User's user avatar
  • 1,383
15 votes
1 answer
6k 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 ...
9 votes
2 answers
71k views

MBR or GPT partition when making ubuntu bootable live usb

I just want to clarify. When making the ubuntu live usb using Rufus, do we select: GPT partition scheme for UEFI MBR partition scheme for UEFI I currently have windows 10 pro installed and would ...
snookrun's user avatar
  • 512
7 votes
4 answers
16k views

Move system to new SSD with dd command

The question is quite simple. I have search for an answer for a while but not sure I got the correct answer. Since mistakes could easily destroy my drive and data, I really want things to be clear. I ...
ptr2love's user avatar
3 votes
3 answers
3k views

How to make a USB drive bootable after live image is copied into it using `dd` command?

I was unable to create live USB drive using dd command while unetbootin works. The former method used to work fine on the particular USB Drive. Is the USB drive filesystem corrupted? If yes, how do I ...
rr0hit's user avatar
  • 51
3 votes
2 answers
2k 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. ...
Rafal's user avatar
  • 1,807
3 votes
5 answers
21k views

Gparted can't create partition table

Here's what the problem is. About a day or so ago I used Gparted live cd to create 3 NTFS primary partitions on my external 500 gig Goflex and one extended with 2 logical partitiones. I had planned ...
William's user avatar
  • 83
2 votes
1 answer
687 views

where did my 766 kb in partition go?

I used fdisk -l and saw this. Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size ...
Gaurav Sharma's user avatar
2 votes
1 answer
2k 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 ...
user86762's user avatar
2 votes
1 answer
3k views

Combining UEFI Ubuntu with MBR Windows

After searching the internet for quite a while without finding a satisfying solution, I decided to ask a question here myself. I'm running Windows 7 and Ubuntu 18 in a dual-boot system on my computer ...
Lars's user avatar
  • 23
2 votes
1 answer
3k views

Boot usb key on both UEFI and MBR?

I installed XUbuntu on a fast usb key on a new computer using UEFI mode. When I try to boot on this usb key with a old computer, it doesn't work. After F12 and selected USB, the screen is black with ...
None's user avatar
  • 247
2 votes
1 answer
397 views

Can I install Ubuntu on a separate SSD, AFTER having encrypted my Windows 8 drive using Truecrypt, without messing up the bootloader?

I would like to install Ubuntu on a fresh SSD that is currently not encrypted. My current system contains (among others) an SSD, fully encrypted using Truecrypt on which Windows 8 is installed. How ...
Sebastiaan van den Broek's user avatar
1 vote
2 answers
2k views

How to fix my MBR? While installing random Ubuntu my MBR is not getting overwritten anymore

I boot with liveUSB. But how do i fix now my MBR, so that i can re-install Ubuntu? (after installing ubuntu i get mostly this blinking cursor and black screen) root@ubuntu:~# fdisk -l Disk /dev/sda: ...
user avatar
1 vote
2 answers
4k views

Is there a way to force Ubuntu to install in BIOS mode?

I'm currently trying to triple boot OSX, WIndows 8.1, and Ubuntu on my macbook pro 5,3. I have 2 hard drives. One only has OSX on it and the other has Windows 8.1 and Ubuntu. That hard drive uses an ...
user1875021's user avatar
1 vote
1 answer
7k 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 ...
Petr Nedvěd's user avatar
1 vote
2 answers
1k views

How to install grub on the PBR instead of MBR?

I own a Mac and I want to install a triple boot. The problem is that I need to keep my windows bootloader to make sure that it works well with Mac OS. But I want Ubuntu too and if I install ubuntu, it ...
Pato's user avatar
  • 11
1 vote
1 answer
3k views

Ubuntu installer is not detecting Windows and existing partitions

While installing Ubuntu 12.04/13.04, the installer doesn't detect my partitions and my Windows 7 OS, so I can't install them side by side. I created partition D through the Windows tool, but I can't ...
Roey's user avatar
  • 11
1 vote
1 answer
5k views

Restoring the MBR

While following instructions from this page I accidentally deleted the MBR. I do however still have a backup of the MBR. I tried to resore it using the following command $dd if=MBR-backup of=/dev/hdx ...
user218800's user avatar
1 vote
2 answers
3k views

How to boot from an old 3.5'' internal hard drive connected via an USB adapter?

The Windows XP of my father's old PC was utterly broken (no wonder), so I removed his 160 GB internal SATA-drive from his PC, took it at home, connected it via a universal USB connector for all kinds ...
ubuplex's user avatar
  • 637
1 vote
1 answer
770 views

installation Ubuntu 14.01 on a different partition with Windows 8.1

Please assist me. I am eager to install Ubuntu 14.01 on a different partition but I do not know how to do it. I have HP with Windows 7 pre-installed then I upgraded to Windows 8.1 Please show me how ...
bilel abidi's user avatar
1 vote
1 answer
28k views

Delete Ubuntu from dual boot Windows 8.1 in GPT disk [duplicate]

I'm using Windows dual booting with Ubuntu. I have uninstalled, and at that time my disk was formated as MBR. After deleting all partitions of Ubuntu I choose to rebuild the MBR in my disk. That way ...
user299142's user avatar
1 vote
1 answer
9k views

GRUB Rescue after Disk Clone

I need a little help from a GRUB expert. I just cloned a 1 TB Seagate drive onto a brand new 2 TB Hitachi, and before swapping them out, I decided to boot-test it. It's tied to my computer through a ...
Michael Macha's user avatar
0 votes
3 answers
3k views

Ubuntu won't boot after clean install

I did a fresh install of Ubuntu, upon restart my pc would say to enter a proper boot medium and press any key (or something similar to that) I followed the instructions from looking at forums to ...
Glen DeWitt's user avatar
0 votes
1 answer
3k views

Error message 0xc00000001 while booting Windows 8 after installing Ubuntu

After I installed Ubuntu 14.04, as I switch on my computer I only receive one message which is: Windows Boot Manager, Windows failed to update: status 0xc00000001 What should I do?
bilel abidi's user avatar
0 votes
1 answer
977 views

grub rescue toughies

I booted a custom distro from a Live CD. I decided to dual boot with WinXP, so I created a small partition and installed the OS. There was a little incompatibility with the processors that I fixed, ...
Manuel Lucero's user avatar
-1 votes
1 answer
1k views

Ubuntu 14.04 Installation on Fujitsu Siemens Notebook - Operating System not found

I had windows vista installed on my laptop and installed ubuntu 12.04 next to it, everything worked, then i installed ubuntu 13.10 and it worked. A few weeks ago i wanted to install 14.04 alone on the ...
Philipp Wrann's user avatar