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Thread: GRUB Bootup Error

  1. #1
    Join Date
    Aug 2010
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    9
    Distro
    Ubuntu 11.04 Natty Narwhal

    Question GRUB Bootup Error

    So Ubuntu has been working fine for me. I had the latest version (which is 11.04) and updated everything. I rebooted and it worked fine for a few days.

    Then when trying to boot Ubuntu I get this error

    Code:
    Try (hd0,0) : NTFS5 : 
    error: "prefix" is not set.
    error: no such device /ubuntu/disks/root.disk
    Then I get one more error which I didn't have time to right down and then the GRUB console comes up. Like this one

    http://plugintolinux.ca/files/slideshows/grub/img3.jpg


    I cannot boot Ubuntu at all. I have Windows 7 professional running along side it and it works perfectly. I installed using the latest version of Wubi.

    Ubuntu Details -

    • One User Account Only
    • That account is password protected, yes I do know the password
    • I selected 17GB in Wubi for the size.


    Also this is a completely differant queston. Is it posible to have Windows 7/Ubuntu and Kubuntu so the computer would be triple booted?

    Thanks
    Keir

  2. #2
    Join Date
    Mar 2010
    Beans
    8,249
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: GRUB Bootup Error

    Hi and welcome to the forums

    This is what you need to do:

    When the computer starts and you see the entry for Ubuntu press "c" to drop to a grub prompt (the one you posted an image of).

    Then enter these commands and post the output here:

    Code:
    search -s -f -n /ubuntu/disks/root.disk
    echo $root
    After this type "reboot" and go back to Windows.

    In Windows, make a backup copy of the root.disk and place it somewhere safe like an external medium (USB stick etc.).

    Once we have the output of the commands above, we can proceed.

  3. #3
    Join Date
    Aug 2010
    Beans
    9
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: GRUB Bootup Error

    I managed to get the 3rd error I talked about.

    Code:
    error: no such device : /ubuntu/disks/root.disk
    Output:

    Code:
    search -s -f -n /ubuntu/disks/root.disk
    error: no such device : /ubuntu/disks/root.disk
    echo $root
    memdisk
    I cannot find that file. On the C:\ drive there is a ubuntu folder but no disks folder.
    Screenshot: http://dl.dropbox.com/u/16989182/screenshot.PNG

    Thanks
    Keir
    Last edited by twinkeir; June 21st, 2011 at 06:39 PM.

  4. #4
    Join Date
    Mar 2010
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    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: GRUB Bootup Error

    You don't appear to have an /disks folder; do you know what might have happened to cause this?

    You need to enable the option to view Hidden Files and Folders:
    http://www.bleepingcomputer.com/tuto...torial151.html

    Once you have done that, look for a folder called C:\found.000 (or similar). If you find the root.disk and swap.disk files there move them back to the root of the C drive and place them in their correct file structure:

    /ubuntu/disks/root.disk
    /ubuntu/disks/swap.disk

    Then try booting again. Also make sure the wubildr and wubildr.mbr files are at the root of the C drive.
    Last edited by Rubi1200; June 21st, 2011 at 07:24 PM.

  5. #5
    Join Date
    Aug 2010
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    9
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: GRUB Bootup Error

    Quote Originally Posted by Rubi1200 View Post
    You don't appear to have an /disks folder; do you know what might have happened to cause this?

    You need to enable the option to view Hidden Files and Folders:
    http://www.bleepingcomputer.com/tuto...torial151.html

    Once you have done that, look for a folder called C:\found.000 (or similar). If you find the root.disk and swap.disk files there move them back to the root of the C drive and place them in their correct file structure:

    /ubuntu/disks/root.disk
    /ubuntu/disks/swap.disk

    Then try booting again. Also make sure the wubildr and wubildr.mbr files are at the root of the C drive.
    Followed the instructions. Found the folder found.000. It is just copying now (16.6GB)
    Do I need the boot folder? The boot folder is empty apart from another empty folder called grub. If I do need it where do I put it?

    To be able to open the folder I had to use the Take Ownership tweak. Will keep you updated. wubildr and wubildr.mbr are in the root of C:\.

    Thanks for your help so far
    Keir

  6. #6
    Join Date
    Mar 2010
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    Ubuntu 10.04 Lucid Lynx

    Re: GRUB Bootup Error

    I don't believe you need those empty folders, only the ones I mentioned.

    Let me know what happens.

  7. #7
    Join Date
    Aug 2010
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    Re: GRUB Bootup Error

    Quote Originally Posted by Rubi1200 View Post
    I don't believe you need those empty folders, only the ones I mentioned.

    Let me know what happens.
    Okay! Almost done!

  8. #8
    Join Date
    Aug 2010
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    Re: GRUB Bootup Error

    THANK YOU SOOOOO MUCH!!!!

    It is working now! I do not know what caused it. I am replying to this thread from Ubuntu. THANKS!

    If you ever need a hand with your PC I can always give you a hand. It would have to be done online though.

  9. #9
    Join Date
    Mar 2010
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    Re: GRUB Bootup Error

    Excellent! I am really pleased things are sorted out.

    You're welcome for the help

    Please mark this Solved using the Thread Tools near the top of the page.

    Last tip: make a backup copy of the root.disk as I mentioned previously just in case this ever happens again.

  10. #10
    Join Date
    Aug 2010
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    Re: GRUB Bootup Error

    Quote Originally Posted by Rubi1200 View Post
    Excellent! I am really pleased things are sorted out.

    You're welcome for the help

    Please mark this Solved using the Thread Tools near the top of the page.

    Last tip: make a backup copy of the root.disk as I mentioned previously just in case this ever happens again.
    Okay will do! Does the swap.disk and root.disk ever change? Or can I make a backup everytime I upgrade only?

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