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Windows 7 and Ubuntu Boot issue

rated 0 times [ 0] [ 0] / answers: 1 / hits: 1459 / 2 Years ago, tue, may 31, 2022, 7:22:13

I had the idea to dual boot Win 7 and Ubuntu and what I did was the following:

Made a clean install of win 7 using all of my hard drive, next I used the Ubuntu live cd and gparted to partition my drive to be the following:

/dev/sda1 ext4 20GB (Linux root)  

/dev/sda2 ntfs 100GB(Win7)  

/dev/sda3 ext4 350GB(Home)  

/dev/sda4 extended 4GB(swap)

The thing is, when installing ubuntu I deleted the partition win 7 creates for its boot sector and recovery and then resized the drive to look like what I mentioned, and Ubuntu installed GRUB to the MBR.

When GRUB boots I can see Ubuntu but not Windows, how can I chainload it?
Or should I fix the windows mbr with the windows 7 installation disk and try to set the dual boot from there?

I don't really care which one of the 2 bootloaders I end up using, I just want the dual boot to work out.

Thanks

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theurn

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answered 2 Years ago losbu · Accepted Answer

Updating the grub installation with sudo update-grub should fix it. When it runs, it searches for bootable images on each partition. For example, here is the output when I run it:

andy@ubuntu:~$ sudo update-grub

Generating grub.cfg ...

Found linux image: /boot/vmlinuz-3.5.0-20-generic

Found initrd image: /boot/initrd.img-3.5.0-20-generic

Found linux image: /boot/vmlinuz-3.5.0-19-generic

Found initrd image: /boot/initrd.img-3.5.0-19-generic

Found linux image: /boot/vmlinuz-3.2.0-33-generic

Found initrd image: /boot/initrd.img-3.2.0-33-generic

Found linux image: /boot/vmlinuz-3.0.0-17-generic

Found initrd image: /boot/initrd.img-3.0.0-17-generic

Found memtest86+ image: /boot/memtest86+.bin

Found Windows Recovery Environment (loader) on /dev/sda1

Found Windows 7 (loader) on /dev/sda2

Found Windows 7 (loader) on /dev/sda4

done

If that doesn't work, make sure you have a Live CD or USB to hand and try the following:-

Check that the partition is actually readable and hasn't been corrupted (happened to be me about 2 months ago). The easiest way to do this is to run GParted and check the list of partitions that appear. (Testdisk may recover any lost partitions)

If everything's OK, boot to Windows Recovery and use Startup Repair

After making sure Windows will boot, restart and boot into your Live CD.

Use grub-install to reinstall grub.