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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I Initialized my HDD to MBR? Can I recover the data ? (Note.. I just intialized, nothing else.)

I had an HDD in my Laptop. I connected that HDD to some other laptop via USBtoSATA bridge and it dint show in My Computer. After trying for several times, I went to disk management, and as soon as it ...
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156 views

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: ...
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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 ...
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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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31 views

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 ...
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253 views

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 ...
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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. ...
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125 views

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 ...
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687 views

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 ...
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Using Clonezilla (or alternate) to make a *partial* full disk image of a multi-partition, multi-boot hdd

So I have a windows multi-boot system with XP installed first, then windows 7. I also have further partitions for user data, etc. I do not fully understand where (and what) data is stored on a pc ...
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16 views

Safe to blank MBR of a disk after adding it to an RAID1 array with mdadm?

I created a RAID1 array of two disks, /dev/sda and /dev/sdb, using mdadm. After several booting problems related to the BIOS and SATA/RAID controller of the board, I accidently created some new ...
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83 views

Trying windows 7 dual boot on a windows 8 machine

I have a ThinkPad (T530) with Windows 8.1 with one HDD and this is what I have done to achieve dual boot with Windows 7 on this machine - On my main and only hard disk I created a new volume ...
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293 views

3TB Hard drive stops reading/locks up after a few minutes of use

This has been driving me a little batty lately as i dont understand enough to fix the problem. My HTPC (Windows 7Pro 32bit) currently has two USB HDD plugged in under separate ports. The 2TB is a ...
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77 views

Backing up MBR - why not restoring the boot code?

I've seen two pages explaining how to backup & restore the MBR: Linux: How to backup hard disk partition table (MBR) UNIX / Linux: Copy Master Boot Record (MBR) They've shown an example with ...
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33 views

MBRs, VBRs, and partitioning of storage devices: how and why they vary across device-types?

The wikipedia entry for Boot Sector says this, CD- ROMs usually have their own structure of boot sectors, for IBM PC compatible systems this is subject to El Torito specifications. ...
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263 views

1TB ext4 Harddrive with 400GB NTFS MBR written by mistake

I was imaging my ext4 1tb storage disk that I had accidentally formatted to NTFS with testdisk and an external usb dock when I had to back out. Testdisk asked about writing the MBR and I clicked yes. ...
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Ubuntu 12.04/xp dual boot testdisk wrote the wrong mbr to my storage disk

Using disk Utility in Ubuntu 12.04, I inadvertently formatted my 1TB ext4 storage disk to NTFS. I was in the process of doing clean installs so I just pulled the drive and set up a usb hdd dock to ...
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163 views

FreeBSD Install DVD changed pmbr to mbr leaving Mac OS X unbootable

Recently I was experimenting with FreeBSD 7.4 i386 Install DVD on a Mac mini Intel 2006 on whose harddisk Mac OS X 10.5.8 was installed. My aim was to just see contents of the harddisk from the ...
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784 views

GRUB2 rescue boot into windows

I had got 2 partitions on my harddrive: 1. win7; 2. Ubuntu 11.10; As it can be predicted the GRUB loader was in the second partition and this partition was formated from ext4 to ntfs. Now I get this ...
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107 views

Windows 7 not booting, could not restore boot record

After not using Windows 7 for a month (and a few Ubuntu 11.10 updates being applied), I found I'm no longer able to boot from GRUB2 to Windows. I've tried to reinstall GRUB2, and have done some other ...
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571 views

macbook rEFIt dual boot mbr issue

I have ubuntu and osx installed on my macbook. It was working fine up until recently. Now, when I boot I have a 20 second period where it makes the mac boot noise and then proceeds to show a grey ...
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24 views

What's wrong with this GRUB setup?

I have two hard disks. The first one contains both Windows and Ubuntu installations, but the first MBR boots to Windows and the second MBR boots, in theory, to Ubuntu. This worked fine until recently. ...
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Unable to automatically select USB stick in BIOS for boot

This is a weird one: I would like to automatically boot my home server from USB (having recently installed ESXi on a USB drive), but the USB drive does not show up in the boot priority section of my ...
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27 views

Why does UEFI BIOS only identify a 2TB drive on a 25TB virtual drive?

I configure a RAID6 using 16 2TB disks, and finally get a 25TB virtual drive as shown in LSI MegaRAID BIOS. And then I boot via a USB stick and try to install 64bit Ubuntu 14.04 on it. At the ...
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17 views

How to restore the Windows MBR

I have a Toshiba Satellite L505D-S5965 with Windows 8.1 Pro and Ubuntu dual-boot, and I can't restore the Windows 8.1 bootloader with EasyBCD. When I use EasyBCD it always says "Missing Operating ...
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26 views

difference between installing grub in MBR and partition

The two command descriptions below are copied from a chroot description. I must say that I am confused by the distinction; it leads to several questions: What is the effective difference between the ...
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18 views

BIOS can't find hard drive - accidentally changed partition table

My hard drive recently crashed after I had to do hard reboot when my computer froze up. I think there was some I/O happening at the time so there are a couple of bad sectors and stuff. After ...
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47 views

First 0x7E00 bytes on USB flash drive have become invisible

I have somehow managed to make the first 0x7E00 bytes (63 sectors) of my USB flash drive invisible to every program in Windows XP. I have tried about 15 different disk editors and tried a lot of MBR ...
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252 views

Need help upgrading OSX to Mavericks: Fix GPT and MBR after installing rEFIt

A while ago I installed Ubuntu using rEFIt on a MacBook, 2.4GHz C2D, 4GB DDR3. Sorry, I don't know the exact model. Anyway, I continued to get errors when trying to upgrade to Mavericks. Eventually, ...
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Moving disk with 4kB sectors from enclosure to internal SATA controller makes MBR invalid

I recently bought a 750GB WD disk for a netbook and formatted it while connected via a USB adapter. Because the adapter would disconnect when it was trying to access the ext4 journal, I connected it ...
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60 views

can't erase MBR of microsd card

I have a microsd that has been used in a windows phone 8.1 phone, I read here and there that I have to erase the MBR of the sd to use it with the pc and other devices. the card seems to work well in ...
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32 views

Uninstalling dual-boot Ubuntu with MBR on separate partition

I have both Win7 x64 Ultimate and Ubuntu installed in dual-boot on a single disk and now I want to uninstall Ubuntu and keep working with windows. Windows was the first OS that got installed and it ...
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25 views

Recovery: what to do when MBR is deleted (Mac)

A bit of background I have an old Macbook (early 2006, Core Duo) that was is in a pretty severe condition, since one of the two memory slots behaves abnormally when I lift the laptop just slightly ...
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47 views

How to boot into a Linux, non-primary partition if Windows bootloader is on the MBR

I have Windows 8.1 installed in legacy mode/BIOS mode (ie: Not UEFI at all). Windows 8.1 is installed in the primary partition (ie: first). I (intend to) have linux installed in a second partition on ...
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155 views

How does Diskpart Clean All affect MBR and implications?

I want to overhaul my entire internal hard drive, re-partition it, and re-install Windows Vista. After booting on the Vista Installation Disk and opening Command Prompt, I'm not sure whether to use ...
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37 views

Copying just the Windows 7 VBR (not MBR) in dd

I know how to copy the MBR using dd. This is just copying the first 446 bytes of the source HD to the new HD. What I am trying to copy is the VBR (volume boot record, partition boot record, or ...
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118 views

Oops I broke my MBR. What do I do?

Note: I just posted this on the mac stack exchange, but they didn't have tags for MBR or GPT so I thought I might have better luck over here... I installed Mavericks a couple weeks ago and discovered ...
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90 views

Reinstall OEM copy of windows 8 as mbr?

Currently the system is using UEFI with a gpt partitioning table, running windows 8. I was wondering whether there is any way to reinstall windows 8 (I have made recovery disks) in such a fashion ...
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214 views

Convert disk with FreeBSD disklabel to MBR or GPT?

I've got a disk that was once partitioned using only a FreeBSD disklabel. The MBR is all 0. The BSD partitions (as dumped by gdisk under Linux) are: BSD partitions: 1 16 ...
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23 views

How to switch to current OS's GRUB bootloader in multi-OS system?

I installed Ubuntu 12.04 along with a bunch of kernels in /dev/sda1. Later I installed Debian 6 to /dev/sda5 along with some other kernels. Recently, I installed another Ubuntu 12.04 in /dev/sda8. ...
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85 views

BSOD on VHD on new SSD after a friend played some 'custom' MineCraft… Malicious rootkit virus? MBR corrupt

SPEC: Dell XPS 420 with (almost brand) new Vertex OCZ SSD. Hardware tests seem ok. Hi guys, like a couple of folks have mentioned, I'm having BSOD issue (0x0000007b - 'no boot device') all of a ...
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76 views

Solaris Automated install Hard-Drive Windows 7

I got two hard disks, one of 40 GB and another one with 1 TB. The 40 GB has windows 7 installed on it, taking all the space of this hdd. The 1 TB disk I got few logical and extended partitions; in ...
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GRUB not loading

I just installed Fedora 18 alongside a pre-existing windows 7 from a live-usb to a single 1TB hard disk with multiple partitions. created all necessary partitions as recommended: / :40GB /boot ...
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103 views

Windows flags secondary SATA drive bootable - can only boot once with the drive in place

On my GPT/EFI-based new Windows 7 PC, I was trying to install my old PC's MBR-based drive as a secondary SATA1 disk. I've got Windows 7 and Linux Mint dual-booting on the new SATA0, but I still want ...
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253 views

3 TB HDD won't reactivate

After doing a clean install of Windows 8 my Seagate 3 TB HDD won't reactivate in Disk Management. The two volumes are there but I can't use them for some reason. The drive was previously used with a ...
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395 views

Can the Lenovo Thinkvantage button be disabled to avoid the need for a custom Thinkpad MBR?

I've migrated to an SSD, but no MBR magic I try works to bootup WinXP from my Lenovo T500. The problem seems to be that a Lenovo laptop requires a custom MBR to provide functionality from the ...
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108 views

Will Win7 ImageCreate overwrite the MBR?

Using Win7 64bit. If i use the Win7 Image Create in the backup/restore app, when i go to re-install the image will it competely overwrite everything, including the MBR??? I want to be able to do ...
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903 views

How to fix my GPT and MBR (hybrid)?

I was trying to create a triple boot (Ubuntu, OS X and Windows), so I used VirtualBox to install Windows 8 (Consumer Preview) to a real (FAT at the time) partition, so it wouldn't have access to my ...
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512 views

Plugged an NTFS drive into a Mac and ruined the partition table/MBR?

I recently plugged an NTFS hard drive which I believed to be functional into a Mac Mini via a SATA-to-USB adapter. The Mac did not appear to read the drive, and after waiting a while and giving up, I ...