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Thread: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

  1. #1
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    Angry Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    Hi
    First time with Unetbootin and Debian, i downloaded the netinstall image and told it to put itself in /dev/sda8 instead of the recommended /dev/sdb_ (my external hard drive...)
    Now when i start it goes past the first screen where you can access bios, but doesn't get to grub and just says something like "no system available. Please insert usb drive and press any key"

    how can i get Grub and access to my system back? I have already REMOVED the /dev/sda8 partition and it still does the same thing...
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  2. #2
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    Angry Re: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    or, how could i remove unetbootin from my install from a live cd environment?
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  3. #3
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    Re: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    Quote Originally Posted by blackbird34 View Post
    or, how could i remove unetbootin from my install from a live cd environment?
    I would guess that when you did what you did you allowed the MBR of your hard disk to be overwritten. You should read the instructions more carefully, that program is designed to make a bootable USB drive not to be written to a partition on a hard drive.

    This thread about GRUB2 is what you need to restore your MBR on sda, but please read it carefully, there is more than just one thing discussed in the thread.
    http://ubuntuforums.org/showthread.php?t=1581099

  4. #4
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    Re: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    Do you still have your other partitions on the USSB drive? Most of the installers for liveCD assume small flash drives and the first thing they say is the entire drive will be erased.

    Post this

    Code:
    sudo fdisk -lu
    If install is ok you might not have to do the full chroot uninstall and reinstall. Thery or four similar ways:
    Reinstall grub2 - Short version & full chroot version
    https://help.ubuntu.com/community/Gr...alling%20GRUB2
    Grub2 info & full chroot version - see METHOD 3 - CHROOT:
    https://wiki.ubuntu.com/Grub2#Recove...20via%20LiveCD
    How to restore the Ubuntu/XP/Vista/7 bootloader (Updated for Ubuntu 9.10 and later with grub2) by talsemgeest
    http://ubuntuforums.org/showthread.php?t=1014708
    chroot with screen shots
    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.




  5. #5
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    Re: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    if you can't boot at all try reinstalling it with a cd i cant think of anything else u could do or you could try to boot up a live cd and when it comes up with the two little buttons at the bottom press the space button and then rescue a broken system

  6. #6
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    Re: Ubuntu won't boot after trying installing a debian "live usb" on /dev/sda8

    I reinstalled before i could come back to the forum and see your answers... As i also use this computer for college
    It hadn't wiped my partition table for /dev/sda (my main hard drive), so I just reinstalled one of my Natty Narwhals and updated it back to normal, as it has a separate /home.
    At least I know how to use Unetbootin now
    Thankyou.
    Ubuntu Manual - Good Tutorials
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