Master Boot Record (MBR) is a type of boot sector popularized by the IBM Personal Computer. It consists of a sequence of 512 bytes located at the first sector of a data storage device such as a hard disk.

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Is it possible to repair the boot sector on an external hard drive?

Is it possible to repair the boot sector of an external hard drive without a Windows installation disk, without any CD-burning capabilities, and without a USB key drive? In other words, I have an ...
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How can I clone my Windows 7 hard drive to an SSD that previously had Windows 8 installed?

I recently bought a new SSD, and decided to create a fresh install of Windows 8 on it. I quickly decided that Windows 8 wasn't for me, so what I decided to do instead was simply clone my existing hard ...
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Fix MS-DOS MBR Without DOS Boot Disk

How can I restore the MBR for MS-DOS without having an MS-DOS boot disk or floppy drive. Ideally, I would like to be able to do this from a Windows 7 Win PE disk. The only solutions I've found online ...
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Cannot Install Bootcamp on Mac Fusion Drive

I have two drive installed in my mid-2013 Macbook pro. It is running osx maverick. I set the two drives (an ssd and a regular HD) up using the fusion drive (following the diy fusion drive guides out ...
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How to fix Truecrypt MBR using Command Prompt or Linux live USB?

I was playing with TrueCrypt and decided to make a fresh installation of Windows 7 from USB stick. Unfortunately Windows 7 installer: "setup was unable to create a new system partition" My entire ...
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Is it safe to convert a MBR flash drive to GPT?

I just bought a new flash drive (128GB) and I want to partition it. I have run into problems (AKA windows not recognizing a second volume if I partition it) because it is an MBR drive. Are there any ...
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36 views

Modifying boot order through MBR?

So I'm trying to modify the boot order on my machine. It seems it could be done through modifying the MBR(I think, not sure), and I haven't been able to find any good resource on how to achieve this. ...
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Found a way to convert drive from GPT to MBR and vice versa without data loss but,

I also have found a way to convert drive from GPT to MBR and vice versa without data loss using the AOMEI Partition Assistant Pro Edition 6.0 but, I fear because actually, I have Windows 10 already ...
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Need HP recovery partition info

I'm configuring a new HP Pavillion DV4 with a 320 GB disk. I made the recovery DVDs, then did a couple other things (including deleting the recovery partition), and finally decided to restore the ...
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49 views

How to create MBR bootable Windows USB installer from Linux?

In a Windows machine I have used Rufus for creating a USB installer for Windows. How can I do the same from Linux? I want to create a Windows USB installer (for Linux UNetbootin and many more tools ...
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Unable to format partitioned 32 GB micro SD card

I am unable to format my 32 GB micro SDHC card after I made two partitions on it. First partition is FAT32. Second is 4 GB ext3. Now I am unable to format my card and delete partitions on it. It ...
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Is it possible to convert a SINGLE drive partition only from GPT to MBR without affecting other drives?

I want to know how to convert a SINGLE drive partition only from GPT to MBR without making any kind of changes on other drives which are in GPT. This means that no data should be affected on other ...
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Recommended setup with 2 hd and 2 os

I have a Thinkpad T420 laptop, with 2 hard drives: SSD drive, 128GB, GPT (disk1) normal HDD, 5400 rpm, 500GB, MBR (disk2) I need to run 2 OS in this laptop: Windows 10 + Ubuntu 16.04. So, I've ...
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How can I move the boot sector to another drive?

When I installed Windows 7 on my new SSD it seems I messed some parts up during the partition selection, and now I have my system partition with the boot sector on another harddrive, and the boot ...
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“No boot device found” after removing Ubuntu from dual boot with Windows 7

Background information My laptop is a Toshiba Satellite L50-B with Intel Core i7 and AMD Radeon R7 M260. It came with Windows 8 pre-installed when I first bought it, but I soon wiped the disk to ...
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1answer
25 views

Can't boot windows 7 from SSD

I had windows 7 installed on my primary HD. Then I got an SSD and did a fresh installation on it. Somehow I messed up the second installation (on the SSD) and now to boot into it, I must boot into the ...
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Can I restore a Win10 bootloader with a Win7 DVD?

My friend's struggling with a Windows 10 installation he cloned from a HDD to a SSD. He tried to create a Win10 stick but it failed. So I would like to know if it's possible to restore the MBR/...
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Will formatting the FreeDOS partition make Windows 10 unbootable?

I bought a Lenovo Y700-17ISK and it came with FreeDOS on a separate partition in the beginning of the hard drive. It looked like that: FreeDOS 1 GB - unallocated space 931 GB Then, I installed ...
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Should I reformat from MBR to GPT? [closed]

I bought a Lenovo Y700 with FreeDOS on a 1 GB partition with 932 GB of unallocated space on the second partition. I wanted to be able to boot 3 systems on it - Windows 7/10, Debian/Xubuntu and ...
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29 views

Why can I boot from a USB device without “making it bootable”?

It seems like you can boot from a USB device without a bootloader to me. Even my 6 years old computers that still have a BIOS. From what I read the BIOS simply looks for an mbr, loads it and ...
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103 views

Relationship between MBR / GPT / UEFI and their limitations

I have a situations where i have to decide to use MBR or GTP and UEFI. I've read too many articles on internet, but I'm confused about some things : I've read that MBR does not support drives with ...
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Ubuntu - Windows 10 - MBR

I realise this question looks like so many others, but its slightly different and I cannot find an answer elsewhere. Basically I have goosed my MBR numerous times in the past and this time I wanted ...
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Can a GPT Hard Drive Read MBR Hard Drive?

So, here is my problem: I installed Windows 8.1 Pro on a UEFI/GPT HDD (hdd0). I've been using my computer for a while and it turns out that it's running out of free space. Is it possible to create a ...
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Dual Boot Centos7 and Windows 10 - Grub issue with gpt

I am trying to install centos on another partition besides my Windows 10 install. I have installed centos successfully and it boots into centos. I then tried to add windows 10 to the grub.cfg file. ...
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Multiple operating systems on the same PC and Large Drives

I've always had multiple OS on my Computer. Using MBR and Boot managers i was able to do this until now. But today i've replaced my Pc with a new one that have a large HDD , 5TB. Reading on internet i'...
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Set up dual boot Debian (Mint LMDE) Linux + Windows 8.1 **without** efi

The specifics is that in my case Windows 8.1 is installed not in EFI mode: so the partition table is in msdos/fat format and there is no efi partition. Unfortunately: All how-tos and manuals I've ...
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MBR to GPT migration on Windows 7 x64 — what is the path forward

I use Backup Exec System Recovery to migrate to larger hard drives, to new PCs, etc. I have painted myself into a new corner, and am looking for the way out. Situation: I migrated to a new hard ...
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3answers
2k views

Convert GPT disk to MBR disk in-place?

Is there any way to reliably convert a disk from GPT to MBR in-place? (i.e. without having to backup/restore any partitions.)
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Is it possible to have one MBR partition and one GPT partition on the same drive?

I would like to use one hard drive on an older computer that doesn't support UEFI, and have it boot from an MBR partition, while having another GPT partition which would be used to boot another ...
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71 views

diskpart.exe on Windows 7 with GPT disk — unable to set partition active?

On windows 7. I cannot figure out how to set a volume active or boot on a GPT disk with diskpart. Is that the wrong tool? I am having to go back to MBR, because I just can't figure out how to ...
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Erase MBR from a Mac

So I found a way to EFI install my Windows 8 to my MacBook Air - and now my partition table looks kinda ugly: /dev/disk0 #: TYPE NAME SIZE IDENTIFIER ...
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Get Windows 7 to boot again

History Originally only Windows 7 was installed on a partition. The first partition was a 100MB recovery partition while the Windows OS and data files was on the second partition. Then I installed ...
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BIOS with 'no issue UEFICompliant' support for GPT partition tables

I would like to change my hard drive partition table from MBR to GPT, (since MBR supports 4 primary partitions). After some searching, I discovered C:\Windows\Panther\setupacl.log, and found a few ...
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How to fix mbr if I can't get to the cmd or terminal, and I deleted grub?

Problem I removed the GRUB, BUT in Windows disk management, I started to delete the first (of four) Linux partitions and after I got tired of waiting, I restarted the PC during the deletion process....
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Why does GParted make my flash disk bootable? If not malware then what?

I did sudo dd if=/dev/zero of=/dev/sda where /dev/sda is my flash disk. /dev/sda was all zeros after this. Then I created a partition table with GParted on the flash disk. I made no other changes. Now ...
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Way to get back formatted Windows MBR partition in dual boot system

I have a Dual boot system and accidentally formatted Windows MBR partition while trying to format a USB (via disks utility). Now I am not able to boot into Windows. My grub doesn't show Windows ...
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Install Windows 10 on an EFI / hybrid MBR Macbook?

I have an 2011 macbook which has been updated to EFI 1.7. Bootcamp sets up a hybrid MBR to support Windows 7. I need to install Windows 10 on this hybrid MBR setup instead of an EFI/GPT setup ...
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Clonezilla fails at cloning with mismatched GPT and MBR partition

I got this message: This disk contains mismatched GPT and MBR partition: /dev/sda Clonezilla's FAQ says: You might have installed an OS with GPT partition table, and later overwrite the ...
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Does the 2 terabyte limit for MBR apply to a partition or the entire disk?

This is really unclear from what I read. I have a 3TB secondary hard drive, but I want to install Windows 7 on that (for dual boot). I have an old BIOS so UEFI is not an option. I understand MBR only ...
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2answers
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Convert MBR to GPT - Without any OS

I just got a new laptop without any OS (it had FreeDOS, but not anymore). When I go to Windows Installer and try to create a new partition from un-allocated space, I don't get any Error message but ...
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How to correct 512-byte sector MBR on a 4096-byte sector disk?

Final update: I already knew what I needed to do to fix this problem; I just didn't know how to do it. I was hoping there would be some ready-made tool to do that automatically - but couldn't find ...
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Recovering damaged external hard disk by installing internally

I had a 1TB Western Digital (My book series) 3.5" USB3. One day, the SATA to USB3 converter board was damaged and has not worked since. I decided to open the cover and use the HDD as an internal HDD....
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How can a MBR formatted hard drive exceed 1.81 TiB capacity?

I recently purchased an external disk drive with 3 terabytes (2.72 TiB) of storage capacity. Now according to Wikipedia's article on MBR, the maximum addressable storage space on a disk formatted ...
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Booting with MBR in UEFI (No CSM mode at all)?

I'm asking here since I can't find a clear and definite answer to if it is possible to boot with an MBR partitioned hard drive in an UEFI-only environment. I've read this question but it is still ...
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Did I lose my data by converting HDD from GPT to MBR? [duplicate]

I tried to install Windows, which required an MBR disk instead of a GPT. I converted GPT to MBR using diskpart utility. After that all my logical disks disappeared and only one (with total amount of ...
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UEFI boot and data disk

I'm on Windows 10 and I'm ready to convert to UEFI boot, but I want to know, if I need to have all my disks with GPT or only disk from which I will boot. Because my data disk is really full and ...
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144 views

Getting error: Windows cannot be installed to this disk. The selected disk is of the GPT partition style

I am trying to reinstall Windows 10 on my friends machine from bootable USB. Following is what I have done till now: I created bootable USB using Windows 10 ISO and Rufus with GPT Partition scheme ...
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1answer
90 views

Do I have to have my OS installed with UEFI to convert my system HDD from MBR to GPT without data loss?

So as of right now I have a PC with a BIOS-only mainboard (Gigabyte 775 - GA-P35-DS3) with which I installed Windows 10 64bit on my 4TB hard drive with MBR. Now I'd like to buy a new mainboard with ...
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1answer
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First 32KB of logical partitions. What is there? Consequences of allowing/limiting access to it

This is a very low level disk question, and I have only been working with this stuff for a short time, and it is quite a different learning experience, so pardon any carelessness with terms, ...
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Windows 8 install on MBR

I have a Notebook that dual-boots Arch Linux and Windows 8 via GRUB. After swapping hard drives, Windows couldn't boot anymore, and I've spent hours on fixing this to no avail. (I've cloned everything ...