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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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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257 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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160 views

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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19 views

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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26 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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3answers
89 views

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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1answer
88 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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4k views

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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141 views

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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3answers
2k views

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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219 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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2answers
70 views

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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1answer
737 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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63 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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1answer
223 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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3answers
907 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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66 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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1answer
114 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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47 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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2answers
4k 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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2answers
3k views

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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160 views

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
90 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
129 views

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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54 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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34 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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1answer
51 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
90 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
6k 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 ...
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624 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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532 views

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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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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3k views

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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47 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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1answer
202 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
68 views

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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148 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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1answer
12k views

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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1answer
205 views

Debian grub bootloader can't find windows 7

I have been using Windows 7 for quite a while on my machine in the following configuration. I have three hard drives, all different sizes, with Windows being installed on the largest. This is also the ...
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57 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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3answers
7k views

LVM volume with corrupt MBR: how to mount and recover data from it?

I am new to LVM and partitioning in general, and so, am in a situation here. The Situation: I accidentally overwrote MBR of a Fedora 16-created LVM disk. Now, everything else on this disk is ...
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7answers
14k views

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 ...
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1answer
137 views

Recover 2.7TB partition converted from GPT to MBR

I have a 3TB disk which had a 128MB Microsoft basic data partition at the beginning, and the rest was a large ~2.7TB ntfs partition. I recently converted this disk from GPT to MBR, and the second ...
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7k views

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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2answers
1k views

How to partition hard drive from MBR to GPT for Windows 8.1 UEFI install

I just bought a new HP notebook (ProBook 450 G0) and it came preinstalled with Suse 11 Enterprise. Now this is the first time I've owned a system with an (U)EFI and I don't know how things work on ...
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30 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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2answers
2k views

windows 7 not booting after ubuntu partition deletion

I had on my laptop windows 7 and ubuntu server 9.10 (the partition with windows 7 was automatically selected at boot time). Today I wanted to install ubuntu 10.4, and for that I deleted the 9.10 ...
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326 views

How do I get my system to find a “buried” MBR?

Following a botched Linux install, my Windows 7 install can't find my MBR normally. It's in there -- somewhere -- and I CAN access it if I use F12 during boot to access the mobo boot options: Note ...
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1answer
150 views

Installing Ubuntu 12.04 x64 in MBR

I wanted to install Ubuntu 12.04 side by side with Windows 8.1 in my SSD. Windows is already installed in MBR, even though I have a UEFI machine. And so I used the legacy Bios. I have confirmed that ...
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1answer
33 views

My disk at half size after formatting

I'm a long time linux user, I'm also a Windows user, after formatting my brand new USB dongle I get ~30Gb from the partition table available to create a new partition where the nominal capacity of the ...