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Thread: ISO to USB UNetbootin "invalid or corrupt kernel image"

  1. #1
    Join Date
    Feb 2008
    Location
    Chicago, IL
    Beans
    112
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Question ISO to USB UNetbootin "invalid or corrupt kernel image"

    This problem isn't specially with Ubuntu Live CDs, but I am going crazy trying to figure out how to put an ISO onto a USB stick to boot off.

    First, I'll go into GParted and reformat my usb stick to a FAT32.

    Then I'll download an ISO or two from FreeNAS (the actual website, not the one that comes with UNetbootin), just as an example, I'll download FreeNAS-8.0.3-RELEASE-p1-x64.iso or FreeNAS-amd64-LiveCD-0.7.2.8191.iso or FreeNAS-amd64-LiveCD-0.7.2.7903.iso. I'll let UNetBootin do it magic work.

    Next, I take out the USB stick and put it into another machine and try and boot into the USB stick. But it doesn't work because it gives me the "invalid or corrupt kernel image" error. However, if I let UNetbootin download its own image, it works. But mine doesn't.

    I have downloaded these isos over and over, but they haven't worked. However, I burned all of these ISOs to a CD and they work fine.

    So...what am I doing wrong and how can I fix it?

  2. #2
    Join Date
    Mar 2011
    Location
    South Korea
    Beans
    263
    Distro
    Ubuntu 10.10 Maverick Meerkat

    Re: ISO to USB UNetbootin "invalid or corrupt kernel image"

    sudo -i
    fdisk -l

    /dev/sdb1

    #remove

    dd if=/dev/zero of=/dev/sdb bs=446 count=12351

    cd /home
    cd username..

    or

    cd ~/downloads
    cd ~/download

    /home/test

    dir

    ubuntu-11.10-desktop-amd64.iso

    dd if=ubuntu-11.10-desktop-amd64.iso of=/dev/sdb bs=1M

    ##rebooting
    install ubuntu


    usb Partition bug clean



    Low-Level-Format ->windows..
    http://hddguru.com/software/HDD-LLF-...l-Format-Tool/

    or
    dd if=/dev/zero of=/dev/sdb
    very longtime

    badblocks -v /media/testdisk

    badblcok view..
    Last edited by oklokl; February 3rd, 2012 at 11:38 AM.

  3. #3
    Join Date
    Feb 2008
    Location
    Chicago, IL
    Beans
    112
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: ISO to USB UNetbootin "invalid or corrupt kernel image"

    I've followed your advice. Everything seemed to work except the computer doesn't load the USB key. I've gone into the bios to make sure the computer loads the usb key, but it doesn't load it.

    But the iso is on the usb key, because when I unplug it from the computer as soon as it is done 'dd'ing. It comes up with the contents of the usb key.

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