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I have a 320gb USB hard drive, one partition for my files, one for playing Wii games, and one which I would like to use for an Ubuntu instillation. To ...
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  1. #1
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    Question [SOLVED] Boot from a separate external partition?


    I have a 320gb USB hard drive, one partition for my files, one for playing Wii games, and one which I would like to use for an Ubuntu instillation.

    To do this, I partitioned my disk accordingly using Windows, then booted from the Ubuntu CD to install the OS to my external hard drive partition. It asked me where I wanted to install the boot loader, so I selected the hard drive itself, rather than the specific partition, reasoning that it would scan the hard drive for a boot record.

    However, when I booted it (with USB boot selected) it simply said "No Operating System found, replace system disk and press enter" or something similar.

    Where have I gone wrong with getting this to work?

    Thanks in advance,
    Laurence

  2. #2
    Linux User sgosnell's Avatar
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    Are you sure you selected the correct drive during the installation? The bootloader should go to the device, sdb or whichever, and not to a partition. I would try reinstalling, or you could specifically reinstall grub2. Google should turn up detailed instructions for doing that.

  3. #3
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    Yup, I installed the bootloader to the drive itself (sdb) rather than the partition with the OS on (sdb 2 or something). Does it make a difference that Ubuntu is installed to a partition near the end of the drive?

    Thanks for your help

  4. #4
    Super Moderator devils casper's Avatar
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    Hi and Welcome !

    We have to check partition structure of your Hard disk.
    Boot up from Ubuntu LiveCD and execute this in Terminal
    Code:
    sudo fdisk -l
    Post output here.

    * It's small L in fdisk -l.
    It is amazing what you can accomplish if you do not care who gets the credit.
    New Users: Read This First

  5. #5
    Linux User sgosnell's Avatar
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    No, it shouldn't matter which partition Ubuntu is on. Grub should find it. You can try reinstalling grub, or do a complete reinstall. Something went wrong, and with a new install it's quicker to just redo it.

  6. #6
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    "No Operating System found, replace system disk and press enter"
    Is an error being reported by the bios. Would suggest having a look in bios setup. On some comps not only must you select to boot USB but under usb setting there might be a selection 'enable legacy boot' or some wording, enable it.

    A look at fdisk as devils casper requested could help if your partition setup is bad.

  7. #7
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    Thanks a lot for your help but I have found out why there was a problem: my BIOS is able to boot from a USB flash drive but not a USB hard drive for some reason... I tried it on my newer laptop, and that coped fine.

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