- Windows Vista
- Ubuntu 9
- (on the same disk, different partitions)
Today I’ve to reinstall Windows. I’ve already an installation of GNU/Linux (Ubuntu) on the same disk. I have to worry? In the past, I had to say a big YES. And since I do a Windows reinstall every 2-3 years, this carry back something from previous times.
(Please skip this paragraph.)
When I was a little boy, the best processor I was dreaming was Pentium 133Mhz, PCs were assembled in my country and my days was filled with Duke Nukem 3d and Lucas Arts adventures, well in that days I had a freaking fear to lose all my precious savegames and BASIC experiments due to a disaster. I discovered a real MBR disaster several years later, with Mandrake and Windows 98.
Well, now things are easier.
- Backup your files from Windows (Lucas Arts adventures savegames too…).
- Reinstall that crappy OS that you had to have to play some games to the partition that it deserves.
- After the operation Your Master Boot Record is gone, GRUB is gone. Linux, where are you??
- Download Super Grub2 Disk.
- Take an old CD-RW (that one with the photos of your sister kitten that she loves so much), erase it and burn the bootable iso on it.
- Now follow the instruction from the website. I’ve followed these steps:
- Select Detect any OS. On the next window, select your GNU/Linux distribution, identified by the kernel version (the more recent version is usually the right).
- Now that your distro is successfully running (i.e. Ubuntu), you have to rebuild the Grub bootloader, putting it on the MBR of the disk.
- Open a shell and type:
Where /dev/sda is the device for the disk where the two OS are. If you have doubt, use tools like gparted to inspect your disk searching for the right device identifier.
- After restart, Grub is running again! So Windows is reinstalled without even touching Ubuntu.
If you’re also interested on changing grub boot sequence order, follow this howto.