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Windows 7: CREATE MBR

09 Apr 2011   #1

Windows 7 Pro 64bit

Dear Forumers,
During the installation of my new computer somehow Windows 7 wrote the MBR to disc 1 instead of disc 0 where the Windows operating system resides. In as much as this is not a problem for me, disc 1 is now starting to show signs of failure. Chkdsk /f is unable to repair this disc and diagnostic software from Western Digital confirms that the drive is failing.
Now I need to write the MBR to disc 0.
I did come across a tutorial on how to create an MBR but for the life of me I canít locate it. Any help in this regard would be appreciated in order that I get this right the first time.

Attached Thumbnails
My System SpecsSystem Spec

09 Apr 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 x64

My System SpecsSystem Spec
09 Apr 2011   #3

Windows 7 Home Premium 64bit

Quote   Quote: Originally Posted by Maguscreed View Post
Just remember to unplug your failing drive when you fix the MBR.
Move your page file to the primary partition as well.
You can always move it back after.
My System SpecsSystem Spec

09 Apr 2011   #4

Win 7 Ult + Starter, XP Pro +Home, 2kAS, Linux Mint 8, SuperOS

You need to set Disk 0, partition 1 active then write the boot configuration data, fix the mbr and fix the bootsector and rewrite the BCD record

Here's the manual way it should be done, I think:

Boot from the Windows 7 DVD, SHIFT-F10 from the first menu to bring up a command prompt window
from the prompt:

DISKPART> select disk 0
Disk 0 is now the selected disk

DISKPART> select partition 1
Partition 1 is now the selected partition
DISKPART> active
Partition 1 is now active

Reboot, startup Windows 7 DVD again and at the Windows Recovery console, shift-F10 at the first dialog again.
Now for the Boot Sector:
The Windows installation is on C:\Windows on an active partition. There is no boot information, no master boot record (MBR) and no Boot Configuration Data (BCD.)
From the recovery command line prompt, type:
BCDBOOT c:\windows
reboot by typing SHUTDOWN /r
That should reboot you back to windows
My System SpecsSystem Spec
09 Apr 2011   #5
Microsoft MVP


As Win7 is already marked Active, just unplug DISK1, set Win7 HD as first HD to boot in BIOS setup (after DVD drive), boot the Win7 DVD Repair console or Repair CD to run Startup Repair up to 3 separate times with reboots until Win7 starts on its own. Startup Repair - Windows 7 Forums

Afterwards you can plug Disk1 back in to delete the 100mb partition in Disk Mgmt or using DIskpart "Force Delete override" command - just make sure it doesn't get set to boot first in BIOS.
My System SpecsSystem Spec
09 Apr 2011   #6

Windows 7x64 Home Premium SP1

I think you may be confusing the MBR with other things. This may help
reflect updates
You have two options
a) Move the system reserved partition to drive 0
System Reserved : Create Using Disk Management
b) Incorporate the booting functions in system reserved boot functions including the MBR into drive 0.

I suggest you go with b)
1) Disconnect drive 1 (the one currently with system reserved)
2) Using the System Repair Boot disk run the System Repair (repair my computer) 3 times.
My System SpecsSystem Spec
10 Apr 2011   #7

Windows 7 Pro 64bit

thanks all for the help. I will try this today and see if I can get this done. One thing I did notice yesterday was when I went t the repair/restore console on the Win7 DVD, my operating system was not reflecting.
My System SpecsSystem Spec
10 Apr 2011   #8
Microsoft MVP


If Win7 doesn't show up in the Repair Console, choose from Recovery Options to open a Command Line, type:

bootrec.exe /fixmbr
bootrec.exe /fixboot

Then boot back in to see if it can find the installation to run the Repairs.

While these commands are automated in Startup Repair along with all other boot repair commands, sometimes one or both of them is required to cause the OS to be discovered by the Repair console.
My System SpecsSystem Spec
10 Apr 2011   #9

Windows 7 Pro 64bit

Thanks all for the help. All sorted and working
My System SpecsSystem Spec
10 Apr 2011   #10

Windows 7 Pro 64bit

Thanks Gregrocker. I followed your suggestion and all is sorted
My System SpecsSystem Spec


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