Questions tagged [mbr]

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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BSOD, MBR corrupt, tried to fix using Testdisk on Linux dual boot, now nothing works

The short story is I received a BSOD from a Windows program. I then couldn't boot Windows. My system is set up with GRUB to dual boot into CentOS, so I booted into CentOS and attempted to fix the MBR ...
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What is the use of the [BOOT]/Bootable_NoEmulation.img file on several boot images?

I've seen a file called [BOOT]/Bootable_NoEmulation.img on several boot images, and always wondered what it's use is. Neither found a suitable magic number nor could Google help me so I ask here. It'...
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Boot Windows 10 on a machine without UEFI after images were created from MBR and restored on GPT partition table in Linux

A 500 GB HDD that started giving signs of obsolescence had multiple partitions, including Linux Mint and Windows 10. This is on a BIOS laptop (non-UEFI). That HDD had MBR partition table. Because of ...
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Windows 10 Update to 2004 failure - Error: 0x80004005 - 0x60016

I've been trying for the last week or so to get Windows 10 to update to 2004. I've tried all of the common solutions (sfc /scannow, DISM restore, media creation tool etc). After looking at the log ...
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Grub: execute other MBR (VeraCrypt)

I have installed Windows and encrypted it with VeraCrypt made a backup of the VeraCrypt MBR (actually everything up to the first partition: dd if=/dev/sda of=/some/file bs=512 count=2048) installed ...
doubleYou's user avatar
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2 answers
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Computer won't boot after uninstalling Ubuntu and reinstalling windows

Hello fellow Internet users, So I decided to install Ubuntu, formatting my hard drive to do so, after a few months I decided to go back to Windows, so I formatted my hard drive and reinstalled ...
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Recover truecrypt partition without MBR + recovery disk?

I destroyed my mbr and have no truecrypt rescue disk. However, I do know my password and my encryption setup (e.g. hashing functions and ciphers used). This happened after an upgrade to version 7.0a ...
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Recover data from Dynamic Disk (MBR) bigger than 2TB

Here is the situation: Promise Array FastTrak TX4310 with 3 disks (750 GB each) in RAID5. This comes to around 1500 GB of data. Last week I had the idea of expanding the RAID with an additional 750 ...
Helder's user avatar
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Convert my drive from MBR to GPT

I installed windows 10 in MBR partitioned table. Due to mistake, I delete c:/ drive data and want to install fresh windows but it requires GPT partition table whereas my D & E drive were in MBR ...
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How to make a system disk image of windows 10 (GPT)?

I used to make a backup of my system partition (Win 7 MBR) with drivexml, so when something goes wrong I could restore my image along with progs and settings. Now I got new ssd and installed win 10 ...
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Programmatically resize extended partition to fill the entire drive

After restoring a cloned OS image on a disk of arbitrary size (larger than that of the original image was captured from), I would like the extended partition in the MBR table to include all the ...
Anton Samsonov's user avatar
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Dual Boot: "Invalid partition table" & cannot boot into Windows 10 anymore

I recently re-did my system setup, having two separate SSDs because Windows usually tries to screw Linux installations up if it's on the same physical disk. HDD layout HDD0 | nvme0n1 | Samsung SSD ...
MarkusWET's user avatar
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Lost volume on external 4TB drive by converting from GPT to MBR

I am fully aware that i acted like a complete fool. Situation: I have Seagate M3 4TB external drive has one volume sized 4TB and containing 300GB of data. I converted it from GPT to MBR. The result ...
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Add EFI capability to GRUB2 on hybrid dual boot MBR type eHDD

I am trying to create a universal (BIOS/EFI) bootable USB HDD that can provide me with portable 32-bit & 64-bit ‘Windows To Go’ environments, together with a 64-bit Ubuntu-based distro and 64-bit ...
AndyOxon's user avatar
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windows showing black screen with cursor after installing Ubuntu

I have installed Ubuntu 16.04 LTS with windows 10 and during installation I selected windows partition as device for boot loader installation. After restating i got: There is no option to boot for ...
Utkarsh Vadar's user avatar
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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 ...
Ben Durham's user avatar
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1 answer
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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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Windows 7 installation - setup was unable to create a system partition or locate an existing partition

I am trying to install Windows 7 from a bootable USB drive. I encountered the following error after selecting the partition to install Windows on: Setup was unable to create a system partition or ...
Berk Özbalcı's user avatar
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Windows 8.1 freeze on startup - Dell Inspiron 15 (7537)

I have a huge problem. (Sorry for my english) The day befoe yesterday I had a Dell Update shown up on my taskbar, I approved it, it ran, and after that I could not turn my laptop on. When I try to ...
Andras Vincze-Nagy's user avatar
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Moving MBR on old HDD to new SSD

After running into some problems tonight (that I was able to fix), I discovered that during the Windows 8 installation, the MBR was placed on my HDD (running Windows 7) that was in the system at the ...
KyleCrowley's user avatar
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Corrupted Windows 8 MBR, recovery disk's repair tools fail

I'm using Windows 8 64 bit on an ASUS N56 Laptop. I was attempting to upgrade to Windows 8.1 and the installation was interrupted. Attempted System Restore, which didn't work. Long story short, I ...
user264743's user avatar
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Put linux on the fifth partition

So I have this quite "insane" partition scheme on my MacBook: Kevins-MacBook-Air:~ Ingwie$ diskutil list /dev/disk0 #: TYPE NAME SIZE IDENTIFIER 0: ...
Ingwie Phoenix's user avatar
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Possible HDD malfunction. Need help in diagnosing

Today when using my PC as I did for almost 4 years I experienced the following: during opening new tab in Opera browser screen froze. Music (AIMP 3) continued to play for about 5 minutes and then ...
Protheus's user avatar
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Should I write the MBR to my SSD?

I'm planning to install a SSD soon, and I want to make sure I get all the boot time benefits. Right now, I have Windows and Ubuntu installed on two separate HDDs. The Windows drive contains the MBR. ...
Evan Kroske's user avatar
2 votes
1 answer
7k views

OS Missing? Messed up the MBR on Win7 64-bit

I have a Windows 7 machine with two hard drives: a 1TB C: drive and 500GB J:. I had Windows XP installed on C: and Windows 7 installed on J:. I installed Windows 7 after Windows XP from an installer ....
hom3lesshom3boy's user avatar
2 votes
3 answers
21k views

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 ...
Drew Chapin's user avatar
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How can I re-install Windows 10 on a GPT drive?

My motherboard is GA-970-UD3 with Phenom II x4 955 NVIDIA GeForce GTX 960 I have just fitted a 4Tb Seagate Barracuda as my 1Tb Barracuda had failed after around 6 years. 12 gig memory (3 x 4gig all ...
Phil Smith's user avatar
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How to boot a Windows 98 disk image restored in a larger disk?

Let me explain what I did in detail: found that the Samsung 1.6GB IDE HDD in a Windows 98 PC (Pentium 200MHz) was failing detached it and dumped it using gddrescue through a slightly newer PC running;...
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Possible to boot OS originally installed MBR after converting disk to GPT?

I have Windows 10 and 7 on my hard disk. I installed Windows 10 on a partition on the disk, GPT, converted the disk to MBR, installed Windows 7 on another partition, then converted the disk back to ...
Alcatel's user avatar
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770 views

The ACTIVE command can only be used on fixed MBR disks

I installed Ubuntu as a Dual boot, the webcam did not work so I tested several solutions that I found on the web, when they failed and I made a restart to the OS, I got a message /dev/sdb7: recovering ...
Asaf's user avatar
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How can I solve this MBR2GPT (Cannot find OS Partition) Issue?

According to How can I migrate a Windows 10 from BIOS/MBR boot to UEFI/GPT without reinstalling? I can convert my system disk to GPT without reinstalling and losing data using the MBR2GPT tool, ...
Elisha Sathya's user avatar
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740 views

MBR2GPT validation failing

Same issue as:MBR2GPT: Disk layout validation failed for disk 0 I've tried all of the solutions here. This is my diskpart and MBR2GPT log. This is my Disk management window. As you can see, I have ...
Matt Griffin's user avatar
1 vote
0 answers
3k views

MBR2GPT Not Working - Can Not Find OS Partition(s) for Disk 3

I'm trying to convert my system to UEFI to get ready for the Windows 11 release. When trying to use the 'mbr2gpt /validate' command in cmd its telling me "Can Not Find OS Partition(s) for Disk 3&...
Marshall's user avatar
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140 views

Windows Disk Management: disk partition is disabled

There is an HDD (WD10EZRX SATA 1 TB). Partition style: MBR. It is divided into three partitions. Two small and one large main partition. For some reason, this main partition is not available. It is ...
Andrey Epifantsev's user avatar
1 vote
1 answer
1k views

Safe to delete or shrink old MBR System Reserved partition after conversion to GPT?

I've seen similar questions before, but never have I seen anyone seem to recognize the difference between the MBR and EFI boot partitions, so I'm asking fresh. Basically, I just converted my disk to a ...
Paynamia's user avatar
1 vote
0 answers
240 views

Cannot boot into any OS any more after bcdedit

I have a dual boot on my Dell laptop, Windows 10 and Kali Linux. During the weekend I did not boot into Kali since I use it just for work. I stayed on Windows because of gaming. There have been a ...
Giorgio Maritano's user avatar
1 vote
1 answer
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How to fix not enough space when trying to convert to GPT from MBR without losing data?

I have a nearly 1TB Ext. Hard Drive which has 2 partitions: One which is about 350GB with 250GB already taken up (FAT32), and another which is roughly 580GB with no space taken up (NTFS). I need to at ...
VeryCoolName's user avatar
1 vote
1 answer
2k views

How can I install Windows 7 64bit on both MBR or GPT partition?

I want to make a multiboot usb toolkit with different versions of Linux and Windows. I've read that you can only install Windows 7 on MBR and Windows 10 on GPT (tell me if I am wrong). I found the ...
Nerick's user avatar
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1 vote
0 answers
316 views

How to fix "extended" partition in Windows 7?

I have created a (supposedly) logical FAT partition on an MBR disk, in the "extended" area using Linux. Afterwards, Windows (on the same machine) storage manager gets confused and doesn't see the ...
Ate Somebits's user avatar
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1 answer
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I dropped my Western DIgital Passport 2TB HDD. It shows up in Disk Management but as Not Initialized and Unknown

I dropped my Western Digital 2TB HDD Passport from around knee-height. When I reconnected it to my laptop, it showed up with the popup of Safely Remove Hardware. It is visible in Device Manager (as My ...
Apoorv Pal's user avatar
1 vote
1 answer
312 views

Unbootable KVM guest

I've tried to shrink the root partition of a KVM guest. I managed to shrink it without data loss (as far as we consider only the data inside it, that is), but now the system does not boot anymore. It'...
Lucio Crusca's user avatar
1 vote
1 answer
96 views

How to restore Windows partitionon a new storage and make it bootable from Linux?

For a few years I created a backup of one partition of my old HDD. I also created a backup of MBR of the HDD. The partition list of the HDD was as following: Device Boot Start End ...
Dimitri Ratz's user avatar
1 vote
1 answer
1k views

Gparted implicitly converts protective MBR to hybrid when creating a NTFS partition

Gparted is implicilty converting my protective MBR to a hybrid MBR without asking me and without telling me, thus breaking everything I'm trying to do (making a NTFS partition that's accessible on ...
Andreas's user avatar
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1 vote
0 answers
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Can I re-initialize a disk changing between MBR/GPT without losing data?

A Windows 10 PC started today with a black screen "Preparing automatic repair" on loop. Then somehow Windows started but one HDD was missing. From Disk Management I can see the HDD, but as an ...
Hodor's user avatar
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1 vote
0 answers
220 views

bcd file ignored but partition is active

I cannot boot windows 10 after the latest update. The update took ages, then I got stuck at boot on a screen called "windows rollback" on which I tried to restore to a previous version without success....
Arnaud Potier's user avatar
1 vote
0 answers
4k views

After mbr2gpt conversion, Windows 10 system cannot boot

Before I ran mbr2gpt my Windows 10 PC had MBR partition with two volumes: one System Reserve partition (2G), one OS partition(236G). After I ran mbr2gpt /convert /disk:0 /allowFullOS A third ...
microbit's user avatar
1 vote
0 answers
634 views

Change MBT into GPT on Veracrypt disk possible?

I have a 2TB Seagate internal 2.5" disk, and created 2 partitions: 100 MB unencrypted partition 1800 MB Veracrypt encrypted partition The partition table on the disk is MBR. I put the internal disk ...
Pr0no's user avatar
  • 187
1 vote
0 answers
2k views

Internal GPT formatted hard drive is recognized as MBR

I formatted a 8TB Seagate IronWolf hard drive via an external USB enclosure. It worked fine: Windows 10 recognized both GPT partitions: Partition 1: GPT, 128 MB Partition 2: GPT, 7451 GB. But when ...
Tobse's user avatar
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1 vote
0 answers
269 views

How to make a cloned OS drive bootable?

I had the misfortune to use EaseUs to clone the OS drive from MBR to GPT using the clone option, not by using the clone system option. The old drive (RAID-0) still works as system drive for Windows 7, ...
Abel's user avatar
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1 vote
2 answers
18k views

Install Windows 7 on mbr hard disk with UEFi firmware

I have a Toshiba and I want to install Windows 7 on it. My firmware is UEFI. I have disabled the secure boot and I have enabled the Legacy support.Before the installation of Windows 7 i have ...
accaacco's user avatar

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