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I have the following partition structure

/dev/loop0 squashfs /dev/sda1 system reserved ( ntfs ) /dev/sda2 ntfs ( windows partition ) /dev/sda3 ntfs /dev/sda5 ntfs /dev/sda6 ext4

I have Ubuntu installed inside windows. I formatted /dev/sda6 from inside Ubuntu ( using Gparted ). What I totally forgot was /dev/sda6 had Fedora which was the root directory of GRUB. Now how do I recover grub. I have tried chrooting to the ubuntu partition and installing grub. But the boot fails with, " No such device... ". And I cannot install elementaryOS on /dev/sda6 since the installer doesn't go beyond a couple of windows.

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    Which version? There are several versions of GRUB, which are incompatible with each other. Commented Nov 26, 2012 at 15:39
  • Does the Ubuntu installer you used have a rescue mode that just does a grub reinstall? Commented Nov 26, 2012 at 18:33

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In OpenSuse, this problem could be solved by doing a recovery installation. This reinstalls all programs which are delivered with the installer, including Grub. As all Ubuntu installers I have ever used had Grub included, I guess this will also works for you, but as I am not eager to duplicate your problem, it isn't guaranteed that Grub will succesfull be installed.

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Best option is to use SuperGrub from http://www.supergrubdisk.org/ Download the iso burn to pen drive or cd and boot into live mode. Follow the onscreen GUI instructions to reinstall and fix the grub.

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