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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Migrating Windows 7 to new hard drive/partition

So, I'be managed to migrate my Windows 7 data over from /dev/sdb3 to a new partition on /dev/sdc1 using ntfsclone. I managed to resize the volume size to match the new partition size. I also used ...
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Recover Windows 8.1 MBR without a working Windows system available

I just screwed over my MBR and Windows won't boot. I don't have a working Windows system available to create a recovery USB disk. My laptop doesn't have a CDROM drive. How do I create a recovery disk ...
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How to change the partition scheme

I want to change the partition scheme in my 500 GB HDD from MBR to GPT scheme without losing DATA on it. What are the traditional tools to do this on both windows 7 and Linux(ubuntu)? And what are the ...
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Windows 8.1 cannot be started from grub2

today I decided to use linux again after installing Windows 8.1... I've tried to boot one of the already existing Linux partitions on my computer but I wasn't successful. So I installed PinguyOS (A ...
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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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36 views

Grub2: “Invalid partition table!”

I have recently had to change bootloaded from my old syslinux to GRUB2. Since I have installed GRUB2 bootloader I am getting the following message on every boot: Invalid partition table! The ...
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1answer
70 views

How can a 3TB HDD show its capacity as 2.72TiB when using MBR partitioning?

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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USB boot error; F11 Key and ASSIST button not working after losing and recovering partition table / MBR

I lost my partition table but I could recover it and I fixed the MBR. I got back all my partition and files include VAIO recovery partition except files on operating system partition ("C:\"). It was ...
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I've got my MBR on a different drive to my system drive so I need two hard drives to keep my system operational

System: Lenovo E20 Thinkstation 2.93Ghz Xeon / 12GB memory dual 1TB drives. Radeon 5750 GPC Win 7 Ultimate SP1. Ok first off my system is operating fine, but it worries me because it's a bit ...
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19 views

Add partition to dynamic disk with 4 partitions already?

I'm thinking about dual-booting Win 8.1 and Xubuntu, but I have encountered a problem. I have 4 partitions already on my HP Laptop, laid out like so: ...
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Unable to access UEFI BIOS setup or boot into Windows after setting MBR with EasyBCD then resetting it

I can't exactly remember what the menu items were called (because I can't boot into my computer), but I'll try my best. Earlier I tried using EasyBCD with Windows 8 on a UEFI Lenovo IdeaPad Z580 ...
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How to parse MBR data in file into human form? File command does not work

I have MBR data in file and I would like to inspect it. Which Linux command can do this? WHen I ran file mbr.file the output was only mbr: DOS/MBR boot sector
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66 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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1answer
34 views

Upgrading internal hard drive to 2 terabyte on Windows 7, do I need GPT/UEFI?

I'm currently trying to upgrade my PC from a 1 TB hard drive to a 2 TB one. I've been through a lot of pain so far, but I hope I'm near the end of it. What I want: All of my data on my 1 TB moved to ...
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Fixing damaged partition table

This is continuation of Recover Extended Partition , but this time I have different problem related partition table it self. I managed to restore partition that I needed and backed up files that were ...
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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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Use `dd` linux program to save / recover a disk's MBR

I have an Ubuntu OS installed on my laptop. I want to install Windows 7 as well to another disk partition (I will do it by recovering it from a special partition on my laptop). After installing ...
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54 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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22 views

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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2answers
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Is it possible to restore a wiped MBR partition table on a machine that has not been rebooted?

While experimenting with how to fix this, I came across a suggestion to wipe the MBR, so I did. dd if=/dev/zero of=/dev/sdb bsize=512 count=1 Whoops. No partition table. Yes, I have backups, but ...
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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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139 views

Windows ignores GPT disk and converts to MBR during installation

I have followed these steps to install windows 7 home premium x64 on a 3tb drive (asus z87-z motherboard): Windows Setup: Installing using the MBR (Master boot record) or GPT (GUID Partition Table) ...
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34 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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56 views

Can external HDD be larger than 2TB with MBR?

I want to expand my media player’s storage with a 4 TB external HDD. The media player does not support GPT, however, just MBR. I read that MBR only allows a maximum partition size of 2 TB. Are ...
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753 views

PC can't boot even from a live USB - probably corrupted bootloader or MBR

While getting rid of dual-booted Linux I tried recovering Windows 7's bootloader with EasyBCD. (one-click process described in this video) However, something went wrong and now GRUB is gone as it ...
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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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1answer
65 views

“Operating System Not Found”

I did a bad format of my pc, I think I erased the mbr too. Everytime I turn on pc it shows me the message "No Operative System Found" . I accessed to BIOS and changed booting option to read CD : If ...
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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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2answers
2k views

MBR equals msdos for gparted?

I want to create a MBR partition table with GParted. In the confirmation window I can choose between various types of partition table. Default is msdos. Is it the same as MBR partition table? I'm ...
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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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Eset antivirus cannot clean the MBR infected virus W32.Sality

I'm using Eset Nod 32 antivirus, Windows 8.1 64 bit, today I meet w32.Sality virus from an USB drive, it look like the virus affected the MBR (Master boot record), all the antivirus I have detected ...
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1answer
46 views

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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2answers
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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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24 views

Windows installation disk MBR error

I need to install windows on a laptop which has no OS. When selecting the partition of Hard disk to install... Gives me such an error:"Windows cannot be installed to this disk. the selected disk has ...
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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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1answer
46 views

Windows System partition in a HD different from where BIOS boots

This is a problem I solved some time ago with the bootmgr command without pain and without losing my BCDs, but the way it was working before intrigues me. I have a SSD disk and a normal SATA disk. I ...
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1answer
59 views

How do I boot into UEFI without going through Windows on my laptop?

So I installed Ubuntu on my Windows 8 laptop in a dual-boot configuration for some time, and tonight, I decided I would uninstall Ubuntu. Well, I've managed to lock myself out of Windows and I'm stuck ...
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1answer
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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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353 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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Initializing external 1TB hard disk with MBR option

I have an 1TB WD my passport hard disk(HD). I connected that HD to my laptop this morning and it didn't show in My Computer. After trying for several times, I went to disk management, and as soon as ...
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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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How do I install GRUB to a USB drive using Windows Vista?

I'm trying to build my recovery usb key drive. I'd like to use GRUB as my bootloader. How do I install GRUB to my usb's MBR? Lots of examples out there seem to expect I'm running Linux.
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Triple-Boot + 4 partition Limit

I just bought a new hard drive so that I could convert my XP-only machine into an XP-Ubuntu-Windows 7 triple boot machine. Since the drive is absurdly huge (1 TB) I wouldn't mind throwing ReactOS ...
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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 ...
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1answer
114 views

Can I still use a GPT secondary hard drive if I converted it to MBR

I'm owner of an MSI GT60 laptop with preinstalled Windows 8. The W8 OS is installed on an 128GB SSD (C:) GPT format. There is a secondary 600GB DATA hard drive (D:) GPT format. My goal is to install ...
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1answer
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I Initialized my HDD to MBR? Can I recover the data ? (Note.. I just intialized, nothing else.) [duplicate]

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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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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1answer
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How do I fix my MBR when windows 7 system recovery shows no drive

I accidentally pulled the power plug when my system was starting up, and I started to get a boot error after POST. Something like "something not found, insert a bootable disk and press enter" So I ...
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Why can't I install Windows 8 on an UEFI machine from an MBR based USB disk?

Just tried to install Windows 8.1 on an UEFI machine/GPT disk. I used a 2 TB MBR-based USB drive to contain the installer (FAT32 partition with Windows 8.1 install files). I got as far as selecting a ...