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Thread: Grub rescue from external HDD

  1. #1
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    Mar 2014
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    Grub rescue from external HDD

    Hello, i have a problem, big time:
    I have no SO on my laptop, but grub rescue pops in, i cant boot from cd's or access to BIOS.
    So i thought of installing ubuntu into an external hdd and do the commands on grub rescue I saw on the internet(like ls hd0, set root, set boot, set prefix etc...), unfortunately no success.
    In the hdd, I have hd1, hd1,msdos1/5/6 however, when I execute ls, either error bad name, or file not found or something like that.

    Options left?

    Thanks for your attention.

  2. #2
    Join Date
    Nov 2011
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    Re: Grub rescue from external HDD

    Welcome to the Ubuntu Forums

    Please explain what you mean by SO, and please describe your computer. The more you tell us, the better we can give tips and advice.

    - Computer brand name and model
    - CPU
    - RAM (size)
    - graphics chip/card
    - wifi chip/card

    And please tell us what version of Ubuntu you are trying to run!

    Finally, how did you install Ubuntu (or linux, which now makes grub rescue pop in)?

  3. #3
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    Mar 2014
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    Re: Grub rescue from external HDD

    Thanks for replying so soon.
    -Samsung NP270E5E-X02PT
    -Intel i5 CPU
    -RAM: 8Gb
    -NVIDIA® Geforce® 710M (Optimus™) with dedicated 2 GB gDDR3
    -802.11b/g/n

    I am trying to run ubuntu-13.04-desktop-i386

    I installed ubuntu on my external hdd via usb on my desktop computer:
    I have 2 pc's, laptop and desktop - I booted my desktop via usb, install on External hdd (I selected the option co-exist with other SO in spite of not having another SO on the HDD)
    I connected my HDD to my Laptop USB and started. Grub rescue popped in and i command 'ls'. That is when hd1 and hd1,msdos etc appeared.

  4. #4
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    Re: Grub rescue from external HDD

    The computer has enough horsepower and RAM.

    - What about Windows and BIOS or UEFI? If UEFI, things are more complicated than with old style BIOS.

    - Optimus is also making things more difficult. There is Bumblebee ... search the internet for linux bumblebee and find information about it.

    Maybe you installed grub into the wrong place, either to the wrong drive or to a partition instead of the head of the drive.

    You have three options:

    1. Reinstall and use 'Something else' at the partitioning page. It gives you better control of what is happening.

    2. Repair grub according to this link

    https://help.ubuntu.com/community/Gr..._Broken_System

    Code:
    sudo mount /dev/sdXY /mnt # Example: sudo mount /dev/sda5 /mnt
    sudo grub-install --boot-directory=/mnt/boot /dev/sdX # Example: sudo grub-install --boot-directory=/mnt/boot /dev/sda
    3. Run Boot-Repair and let it do it's job. In this case I suggest that you disconnect any drives (even internal drives) that you do not want to involve in the repair job.

    https://help.ubuntu.com/community/Boot-Repair
    Last edited by sudodus; 2 Weeks Ago at 06:45 PM. Reason: UEFI, Bumblebee

  5. #5
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    Ubuntu 12.04 Precise Pangolin

    Re: Grub rescue from external HDD

    You need to install a newer version.
    EOL Notice: Raring (13.04) will be End of Life on January 27, 2014
    http://releases.ubuntu.com/13.04/

    And you need to install a 64 bit verison. If you install a 32 bit version it will not work with UEFI. Do you have Windows in UEFI boot mode?
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.




  6. #6
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    Mar 2014
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    Re: Grub rescue from external HDD

    Quote Originally Posted by oldfred View Post
    You need to install a newer version.
    EOL Notice: Raring (13.04) will be End of Life on January 27, 2014
    http://releases.ubuntu.com/13.04/

    And you need to install a 64 bit verison. If you install a 32 bit version it will not work with UEFI. Do you have Windows in UEFI boot mode?
    No, it is not on UEFI MODE, it is on Legacy mode, i guess that is why i cant access BIOS.
    Thanks for answering.

  7. #7
    Join Date
    Mar 2014
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    Re: Grub rescue from external HDD

    Quote Originally Posted by sudodus View Post
    The computer has enough horsepower and RAM.

    - What about Windows and BIOS or UEFI? If UEFI, things are more complicated than with old style BIOS.

    - Optimus is also making things more difficult. There is Bumblebee ... search the internet for linux bumblebee and find information about it.

    Maybe you installed grub into the wrong place, either to the wrong drive or to a partition instead of the head of the drive.

    You have three options:

    1. Reinstall and use 'Something else' at the partitioning page. It gives you better control of what is happening.

    2. Repair grub according to this link

    https://help.ubuntu.com/community/Gr..._Broken_System

    Code:
    sudo mount /dev/sdXY /mnt # Example: sudo mount /dev/sda5 /mnt
    sudo grub-install --boot-directory=/mnt/boot /dev/sdX # Example: sudo grub-install --boot-directory=/mnt/boot /dev/sda
    3. Run Boot-Repair and let it do it's job. In this case I suggest that you disconnect any drives (even internal drives) that you do not want to involve in the repair job.

    https://help.ubuntu.com/community/Boot-Repair
    -Bios on Legacy mode...

    In relation to your advices:
    1- I will try to reinstall using tha whole Externall HDD

    2-Repair Grub? I cant access to anything, how do i do that? In my Desktop computer?

    3. Boot-repair where? In my Desktop computer? Disconnect which drives (Laptop/Desktop)

    I am sorry i am so Inexperienced, i am just very worrried about my computer, i messed up, i know. Any help is appreciated.
    Thanks you once again.

  8. #8
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Grub rescue from external HDD

    Some computers have issues if UEFI and you did not turn off fast boot in Windows or some also have settings in UEFI/BIOS.
    Often you have to do a full power down. If a laptop remove battery and hold power switch for a few seconds to drain residual power. Then see if you can get into UEFI/BIOS with whatever key is correct for your computer.
    UEFI/BIOS Boot keys - about halfway down on this Microsoft page
    http://social.technet.microsoft.com/...ows-to-go.aspx

    Boot-Repair is a app/tool you install into Ubuntu live installer or can be downloaded as its own liveCD. Will only do minor Windows fixes as you have to have a Windows repair CD or flash drive to fully fix Windows issues. You make that from Windows.

    Post the link to the Create BootInfo report. Is part of Boot-Repair:
    https://help.ubuntu.com/community/Boot-Info
    Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
    https://help.ubuntu.com/community/Boot-Repair
    You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.




  9. #9
    Join Date
    Mar 2014
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    Re: Grub rescue from external HDD

    Quote Originally Posted by oldfred View Post
    Some computers have issues if UEFI and you did not turn off fast boot in Windows or some also have settings in UEFI/BIOS.
    Often you have to do a full power down. If a laptop remove battery and hold power switch for a few seconds to drain residual power. Then see if you can get into UEFI/BIOS with whatever key is correct for your computer.
    UEFI/BIOS Boot keys - about halfway down on this Microsoft page
    http://social.technet.microsoft.com/...ows-to-go.aspx

    Boot-Repair is a app/tool you install into Ubuntu live installer or can be downloaded as its own liveCD. Will only do minor Windows fixes as you have to have a Windows repair CD or flash drive to fully fix Windows issues. You make that from Windows.

    Post the link to the Create BootInfo report. Is part of Boot-Repair:
    https://help.ubuntu.com/community/Boot-Info
    Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
    https://help.ubuntu.com/community/Boot-Repair
    You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
    Tried the power off and drain battery, it did not work
    And since i cant even boot from anywhere else,I guess this is the end of my laptop.

    Thank you for your concern.

  10. #10
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: Grub rescue from external HDD

    There were some older Samsung computers that would be bricked but fixes have been out for over a year.
    If Samsung check model number as some can only be installed in legacy/CSM mode or computer may be bricked.
    Kernel updates being released and Samsung needs to update UEFI/BIOS.

    UEFI boot live-usb bricks SAMSUNG 530U3C,np700z5c laptop - fix released
    https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557
    http://www.h-online.com/open/news/it...s-1793958.html
    http://mjg59.dreamwidth.org/25091.html
    The problem also appears to affect Ubuntu 12.10 and other Samsung models. The Ubuntu bug report includes posts from users reporting that the problem also affects 300E5C, NP700Z5C, NP700Z7C and NP900X4C series laptops.
    http://mjg59.dreamwidth.org/23554.html

    Other Samsungs
    Installing Ubuntu 13.10 on a Samsung ATIV Book 9 Plus
    http://ubuntuforums.org/showthread.php?t=2203824
    Update UEFI/BIOS helped see ports and other issues.
    How to: Dual boot Windows 8 and Ubuntu 13.10 on Samsung 900X3E
    http://ubuntuforums.org/showthread.php?t=2176559
    Samsung Ultrabook Windows 8 & Ubuntu & recovery boot Disk view of partitions post 7
    http://ubuntuforums.org/showthread.php?t=2097690
    Samsung Series 7 - post #5 Windows 8 & UEFI, Ubuntu only to new SSD
    http://ubuntuforums.org/showthread.php?p=12382951
    SAMSUNG Series 3 NP365E5C-XXXXX laptops
    http://ubuntuforums.org/showthread.php?t=2120763
    Samsung series 5 UltraBook, erase Windows & install to SSD
    http://schoolsplay.wordpress.com/201...book-with-ssd/
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.




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