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Damaged Ubuntu GRUB

Tags:
  • Windows
  • Dual Boot
  • Hard Drives
  • Grub
  • Ubuntu
Last response: in Linux/Free BSD
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June 28, 2014 4:44:25 PM

I had a dual boot of Ubuntu and Windows 7 on my HDD and I just recently repartitioned inside of Windows. Upon reboot, I receive this message:

error: unknown filesystem
Entering rescue mode...
grub rescue>


Is there anyway I can bypass the GRUB rescue to boot into my Windows partition? Thanks.

More about : damaged ubuntu grub

June 28, 2014 5:14:15 PM

You have deleted your GRUB when you repartitioned.

Either get a windows installation disk and use the boot repair tool.

Or get a Ubuntu livecd and use this:
https://help.ubuntu.com/community/Boot-Repair
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June 28, 2014 11:21:09 PM

Boot-repair comes in a standalone ISO as well. Just use the default repair and both will be back.
A guide to Startup Repair
So, your computer's been infected or the storage has been damaged in some way, which causes the computer to only be able to boot into BIOS, and this annoying little GUI: So, I'm here to show you how to fix this. Sadly, the most practical way of... See full content
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Best solution

June 29, 2014 1:40:39 AM

More likely than deleting GRUB is that the repartitioning has changed the numbers of the Linux and/or Windows partitions. This could lead to further problems with booting the Linux install and possibly the Windows one too. In addition to doing a boot repair you may need to edit the /etc/fstab entries and repair the Windows install - it all depends upon the exact version of Linux. If you know what you are doing it is possible to recover by typing in the appropriate GRUB commands, but it can be a bit tricky. The moral is that if you change any partitions on a drive with OSs installed you should only add new partitions to the end of the drive, not in between or before other partitions (unless you are very clever!).

What exactly did the "repartition" involve?
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