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Grub rescue - error: unknown filesystem

I have a netbook with a dualboot for Windows7 and Ubuntu. I accidentally deleted the partition for Ubuntu then after I restart my netbook it goes directly to the error: unknown filesystem grub rescue>.

I have read some of the threads but most of them require a LiveCD. Is there a way to fix this error without using a LiveCD?

I have an installer of Ubuntu on a flash drive will that one work since I don't have a DVD ROM available?

Community
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treszjaloom
  • 31

4 Answers4

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You can install GRUB on your hard disk. You can do this by using putting the LiveCD on a flash disk ( How can I make a Ubuntu Live USB with Ubuntu, GParted & HBCD? )

  1. Boot to the Flash Disk. When you get the Ubuntu Live Desktop, Open terminal ( What is a terminal and how do I open and use it? ) and type the following:

    sudo grub

    This will get you a grub> prompt (i.e. the grub shell).

  2. At grub>. enter these commands

    find /boot/grub/stage1

    This will return a location. If you have more than one, select the installation that you want to provide the grub files.

  3. This is important: what was returned for the find command use it in the next line for the "?" -

    root (hd?,?)

    Again use the value from the find command i.e. if find returned (hd0,1) then you would enter root (hd0,1)

  4. Next enter the command to install grub to the mbr

    setup (hd0)

  5. Finally exit the grub shell

    quit

Now you are done. Reboot the machine.

Another option is to run this command:

grub-install /dev/hda
Community
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Amit Rane
  • 1,310
2

You can simply reinstall Ubuntu from USB on deleted partition space.

Another way of acting is to recover deleted partition using "TestDisk" for example.

snayob
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0

No. You must fix it with LiveCD because You deleted GRUB which is responsible for booting system.

zuberuber
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grub rescue> is happening because you deleted Ubuntu, and along with it the /boot folder, which contains vital files. You must use a LiveCD to install a bootloader - either GRUB, or use the Windows CD to reinstall the Windows bootloader. I suggest LILO (Linux Loader), but like the fellow who suggested syslinux, I am not sure how to install it. There are Ubuntu docs which document this, I believe - and lots of forum threads. @AthloX: GRUB IS installed on the MBR, just has no /boot.

whiskers75
  • 1,132