Monday, February 17, 2014

Restoring dual boot windows / Ubuntu system : Using Clonezilla backup files

After I restored the /dev/sda3 partition of my laptop using the clonezilla backup of another Ubuntu system I had taken earlier,  I had to make the system bootable using grub2. Clonezilla had only put the ubuntu image on /dev/sda3 and not installed the grub in /boot folder of /dev/sda3  or the stage 1 files in /dev/sda.

1.    Make the ubuntu installation bootable

    (a) Use a live cd(Ubuntu) to boot up and mount the ubuntu partition  
         (/dev/sda3) at mount point /mnt

        sudo fdisk -l
        sudo mount -t auto /dev/sda3 /mnt

    (b) Install grub
        sudo grub-install --boot-directory=/mnt /dev/sda

    (c) Update grub to identify the win7 instln loc at /dev/sda1

        sudo update-grub

2.   Reboot. After rebooting the system, I could boot into my Ubuntu instln without any problem. But when I tried to boot up my win7 from the grub the system halted with the following error :-

    Status : 0xc000000e

    Info   : The boot  selection failed because a required dev is inaccessible.

A little bit of search on google suggested that the boot files of win7 were
corrupted somehow during the process.

3.    Getting win7 up and running :-
    Boot up the machine using a win7 recovery disk and after selecting the
    language etc click on Next button. In the next screen press Shift +F10 
    to get a terminal and execute the following commands :-
        c:/> bootrec /fixboot

        c:/> bootrec /fixmbr

        c:/> bootrec /rebuildbcd
        (this gave an error......Couldnot detect any windows installation!)

        To fix this, type the following commands at the Windows Recovery
        command prompt:

            c:/> bcdedit /export C:\BCD_Backup
            c:/> cd boot
            c:/> attrib bcd -s -h -r
            c:/> ren c:\boot\bcd bcd.old
            c:/> bootrec /RebuildBcd

    Close the terminal window and exit.

4.    On the next attempt I booted up both my win7 and Ubuntu without any problem.

Thanks !

No comments:

Post a Comment