Questions tagged [mbr]

master boot record (MBR)

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Sudo dd is a directory

I am trying to backup the MBR to a folder called MBRbackup under /etc directory. When I run the command: dd if=/dev/sda of=/etc/MBRbackup bs=512 count=1 I get the the message: dd: failed to open '...
Undertaken's user avatar
1 vote
2 answers
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In 2018 and with Ubuntu 16.04 installed, can I still make a backup of the MBR with dd?

A few years ago I used to backup the MBR of a (now old) laptop with: dd if=/dev/sda of=mbr_63.backup bs=512 count=63 Well, this was the first 63 sectors, a bit better than the MBR only, I think. ...
Mephisto's user avatar
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UEFI not seeing SSD

After installing Ubuntu alongside windows 10 (windows 10 on one SSD, Ubuntu on the other SSD), I modified the MBR via my Windows following instructions online, I cannot remember why I was modifying my ...
Jim's user avatar
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10 votes
3 answers
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Difference between Legacy BIOS and UEFI

Why are the terms MBR and GPT associated with Legacy BIOS and UEFI respectively?
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Uninstall Ubuntu and Fix Windows MBR

I need to uninstall my Ubuntu from my personal machine (because I already have it in my work machine and my Windows is now more necessary with the personal). I'd usually uninstall Ubuntu by deleting ...
dagitab's user avatar
1 vote
1 answer
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cli_scangpt: detected a non-protective MBR

I am running clamscan on my system with following command sudo clamscan --max-filesize=3999M --max-scansize=3999M --exclude-dir=/sys/* -i -r / received the message LibClamAV Warning: cli_scangpt: ...
Gaurav Agarwal's user avatar
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Wrong path when try to restore MBR with dd ! Any way to fix? [solved]

My laptop hawe 1TB hdd, with few of partition. Ubuntu is 125gb and hawe few others. I backup my MBR with command: dd if=/dev/sda1 of=mbr.bkp bs=512 count=1 Today, after some issues i try to restore ...
dMatija's user avatar
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Ubuntu 16.04 bootload grub2 problem?

Ok, I have an internal SSD installed with Ubuntu 16.04 on it. Upon installation I deleted both partitions on both disks and installed Ubuntu on the SSD. I have a Lenovo V570 with the CD Drive replaced ...
Avemt1's user avatar
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3 votes
2 answers
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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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Install ubuntu in MBR single boot

Before marking my question as duplicate I'd like to say that days ago when my problem showed up until now I've been searching for a solution to it but it seems a special situation (at least for me) ...
Magdy.A's user avatar
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Installing and using Grub2 in free space after MBR

Note: I feel the two questions below are basic questions, however I could not find a clear answer searching the web. Background I would like to install Grub2 in some free space after the MBR. I ...
Hibou57's user avatar
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2 votes
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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 ...
Arthur Bernardo's user avatar
0 votes
1 answer
1k views

Move a logical partition to a primary and change MBR to GPT without data loss

After long search, I havent find anything so ive decided to create my own post. This is a gparted screenshot: (https://i.stack.imgur.com/IdlCO.jpg) I have 2 question: How can I move my logical ...
Arthur Bernardo's user avatar
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1 answer
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How to know if bootstrap changed [closed]

Worry if the virus changes grub2 in the first 446 bytes of disk where is grub2. If it get changed, how do i notice?
Flent's user avatar
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1 answer
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Black screen with blinking cursor unresponsive keyboard

Removed my mbr because it was currupt​. I had intended to replace with an uncorrupted copy but after l removed it I just got a blinking cursor without​ ability access command line. Keyboard will ...
gipp1978's user avatar
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1 answer
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Installation of Windows 10 alongside Ubuntu 16.04 LTS (32 bits) (Windows after Ubuntu) [duplicate]

I have Ubuntu 16.04 LTS (32 bits) installed in my Laptop (Lenovo Ideapad 300) and want to make a dual boot with Windows 10. The reason is that I need to use a software (Clip Studio Paint) which only ...
Henao's user avatar
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1 vote
2 answers
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Problems with content of the MBR file [closed]

I'm trying to look at the content of MBR file. I save its content to some file, for example mbr.bin: sudo dd if=/dev/sda of=mbr.bin bs=512 count=1 Then I use file utility: file mbr.bin. I expect to ...
user4385124's user avatar
0 votes
1 answer
5k views

Unable to change GPT to MBR

ubuntu@ubuntu:~$ sudo gdisk /dev/sda2 GPT fdisk (gdisk) version 1.0.1 Partition table scan: MBR: MBR only BSD: not present APM: not present GPT: not present Partition table scan displays ...
garrisonxci's user avatar
4 votes
3 answers
17k views

How can I install the "MBR" on a clean Hard Disk?

To get rid of Windows 10 I wiped the HDD using GParted on the Ubuntu 16.04 installation media. Accidentally I also wiped the "MBR", so that my HDD is absolutely clean. This means that nothing will ...
Duncan's user avatar
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1 vote
0 answers
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Install Grub from Windows

I've recently updated my Windows 10 to a newer version. It sadly overwrote the MBR. Now I have to reinstall Grub but I don't have any USB stick nor can I burn DVDs. Can anyone help me, get linux back ...
Uwe Pfeifer's user avatar
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1 answer
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apparantly inconsistent partition table in Ubuntu liveUSB

I recently created a bootable live Ubuntu USB and I chose to create it with the Startup Disk Creator natively offered by Ubuntu. Everything went along with and the Ubuntu even booted properly. But ...
user107157'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
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2 answers
414 views

Ubuntu 16.04/16.10 not booting

I have been trying to install Ubuntu 16.10/16.04 on my computer. 16.04 also had installation issues if I remember correctly, but it eventually worked. It got deleted and I installed windows on a ...
Eric G.'s user avatar
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1 vote
0 answers
1k views

Install Lubuntu on Fujitsu Futro S450 Thin Client which is using Compact Flash as HDD

Trying to install Lubuntu on Fujitsu Futro S450 Thin Client which is using Compact Flash as HDD. Installed on internal Compact Flash using Lubuntu ISO Image on USB Installer runs no problems At the ...
Walter A. Jablonowski's user avatar
5 votes
2 answers
4k views

Can I install another linux os without bootloader?

I have a debian Gnu/linux installed in my system and I want to dual boot ubuntu.Can I install ubuntu without replacing debian bootloader?
linux geek's user avatar
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1 answer
138 views

What happens to windows bootloader after installing ubuntu?

I heard that in mbr partiton scheme, a bootloader is installed before the first partion.Do the grub delete or removes the windows bootloader.Did I can install ubuntu without bootloader, because ...
linux geek's user avatar
0 votes
1 answer
3k views

From GPT to MBR in linux ?

Actually I have ubuntu 16.04 in single boot but considering I'll have to install windiows 7 to be dual boot for work purposes , I could make a space for it using GParted but how can I format that ...
Magdy.A's user avatar
  • 123
0 votes
1 answer
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Install Ubuntu on an MBR disk, with a UEFI system

I have a Seagate Expansion Portable 1TB external drive, and I am planning to install Ubuntu on it. However, the disk seems to be MBR, and not GPT, which seems to be an issue, as my computer has a UEFI ...
InitializeSahib's user avatar
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1 answer
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External Hard drive no longer registering as a block device. What can be done?

I have 1tb external drive that connects to my media server in my kids room. One day the XBMCBUNTU(xenial) running on the media server decided it no longer wanted to communicate with that drive. It ...
Frank Barcenas's user avatar
2 votes
1 answer
797 views

The MBR of the Ubuntu ISO has partition type 0, which is an invalid value [duplicate]

The following line shows the the four partition table entries of 16 bytes each. See here for a specification of the format. $ sudo hd ubuntu-16.10-desktop-amd64.iso -s 446 -n 64 000001be 80 00 01 ...
Mads Skjern's user avatar
  • 1,026
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0 answers
79 views

Ubuntu doesnt show unallocated partition but rather the whole NTFS partition

First of all the disk doesnt show as primary in Windows Disk Managment when I try to split a certain partition but rather simple volume. When I split the partition, I can allocate to NTFS as easy as ...
Amine's user avatar
  • 121
2 votes
0 answers
658 views

A little lost with grub and mbr : Formatting the partition that has boot flag?

I plan on doing something stupid. Therefore, I need to take all necessary precautions to make it less stupid. As always with those very low level operations, I'm very far from being an expert and may ...
Al_th's user avatar
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0 votes
1 answer
133 views

Can GRUB be installed to separate drive that doesn't contain a Linux system?

As the title says, can GRUB be installed to separate drive that doesn't contain a Linux system? For example, let's say I have two disks: sda, and sdb. Let's say the partition layout is something like ...
You'reAGitForNotUsingGit's user avatar
1 vote
0 answers
221 views

Boot Xubuntu Installation from USB on EFI (MAC) & PC (NON EFI)

I have a full Xubuntu Installation on a USB Drive and configured it to boot on a MAC. It is recognized as "EFI Boot". The Drive won't boot on a regular Laptop with a Bios. Is there a possibility to ...
derdon's user avatar
  • 21
0 votes
1 answer
2k views

Ubuntu Legacy install on GPT based Disk

I have a very peculiar condition where I need GPT based disk for hackintosh. I also want to install the following distros: * Ubuntu 16.04 * Elementary OS Luna (Ubuntu 12 based) I'm pretty confused ...
user3677331's user avatar
0 votes
0 answers
1k views

Ubuntu 16.04.1 - converting an ext4 filesystem from MBR to GPT?

What's the up-to-date/simplest method of using gdisk to convert an ext4 drive from MBR to GPT? I have seen many different older methods described but I don't know which one is relevant for the modern ...
warsong's user avatar
  • 417
2 votes
0 answers
412 views

how to recover MBR after Ubuntu installation, how to go back to windows MBR

I'm a new Ubuntu user and have big problem. I installed Ubuntu 16.04.1 on company laptop. During installation I rewrite mbr on sd1 widdows7 disk. My Grub do not find windows partition and this ...
user598096's user avatar
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
  • 1,305
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
0 votes
1 answer
52 views

can't access MBR, GRUB2, freshly installed Ubuntu remains "hidden* (dualboot)

-win 10 laptop -created 160gb partition for ubuntu -installed ubuntu 16.04 on that partition -system reboots after installation -win 10 boots up -can't find my freshly installed ubuntu. How can ...
zunae's user avatar
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1 vote
1 answer
4k views

Can I switch to a 4tb HDD without UEFI?

Can anyone tell me if it's possible to switch to a 4tb HDD on my computer that does not have UEFI booting? Would a computer without UEFI be able to handle a 4tb HDD either as MBR or GPT? Would I be ...
Ev-'s user avatar
  • 305
0 votes
2 answers
1k views

MBR Issues after moving/resizing partition (Unable to Boot; BIOS cannot see OS)

I have been reading for some time now, and have some ideas, but don't want to lose all my data. I was doing an update, and found that I didn't have enough space left in my /dev/sda2 partition. I ...
CalicoBrak's user avatar
0 votes
1 answer
376 views

I have Ubuntu and Windows 10 installed on 2 different drives. How do I remove Ubuntu? [duplicate]

I found an old SSD and decided to use it for Ubuntu on my desktop where I only had Windows 10. I installed it and everything worked fine (dual booting, that is). Turns out that the reason the SSD was ...
mnordber's user avatar
  • 101
0 votes
2 answers
2k views

best way to dual boot Ubuntu with windows 10?

in the past I have dual booted Windows and Ubuntu however it was always a huge mess that I felt I had no control over. How does the MBR know which OS to boot from if they're on different drives? I ...
ClarkTheCoder'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
2 votes
2 answers
3k 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 ...
R S's user avatar
  • 2,399
0 votes
2 answers
1k views

Laptop boot stuck on MBR 1FA

I followed a guide to restore MBR. The reason for doing this was because I originally had a Sony vaio which has Windows on. I installed Linux on it then wanted to revert back to Windows and read that ...
Harvey's user avatar
  • 1
1 vote
1 answer
265 views

Dual booting Ubuntu Mate on a MBR BIOS system with 4 primary partitions

My laptop has, at least according to what I've read on the internet, a MBR system with a legacy BIOS. Check for whether system is MBR Unfortunately it has 4 partitions: a C: drive, two hidden ...
Saumitra Bose's user avatar
1 vote
1 answer
2k views

Ubuntu - Windows 10 - MBR

I have installed Ubuntu along side Windows 10 but need to remove it and install Fedora. Am I able to fix the MBR before removing the Ubuntu partition? I realise this question looks like so many ...
Adam 'Sacki' Sackfield's user avatar
0 votes
1 answer
158 views

Fresh install Ubuntu 16.04 : Not possible to boot Win10

Fresh install Ubuntu 16.04 on disk sdc. Windows 10 is on sda. During install, I chose to put grub on sda, I guess it was a mistake. Grub does not see W10, and if I choose starting on windows hd ...
Mike Sierra's user avatar

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