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Thread: [SOLVED] Error 21 with USB drive

  1. #11
    Join Date
    Jul 2006
    Beans
    123

    Re: Error 21 with USB drive

    Am still getting the reply

    grub> find /boot/grub/stage1
    (hd0,0)
    (hd1,0)
    (hd2,0)

    grub> root hd(0,0)

    Error 11: Unrecognized device string


    The page
    http://www.gnu.org/software/grub/manual/grub.html
    gives no information on that error, that I can find.

  2. #12
    Join Date
    Jul 2006
    Beans
    123

    Re: Error 21 with USB drive

    ok, so if I

    sudo grub
    and then
    find /boot/grub/stage1
    and then
    root hd(0,0)

    using the terminal on the live cd I get:
    Error 11: Unrecognized device string

    but if I

    sudo grub
    and then
    find /boot/grub/stage1
    and then
    root hd(0,0)
    using the terminal on the main hard drive
    I get
    grub>

    the next question is
    can I then use
    setup hd(0)

    if I am using the terminal on the main hard drive???

    Sorry, but I have no idea on grub.

  3. #13
    Join Date
    Jul 2008
    Beans
    871
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Re: Error 21 with USB drive

    Ok, I see what's happening, that I forgot to tell you about. When you use your LiveCD, you have to make sure that you mount the partition prior to using it in GRUB.

    What you are seeing when you use if off your hard drive is correct. Once you do the root string it will just return to the grub prompt. Go on to the next step which is the setup.

    Sorry about the confusing. If you can run it from your hard drive, do so and based on what you're saying, it should work fine.
    Any piece of knowledge I acquire today has a value at this moment exactly proportioned to my skill to deal with it. Tomorrow, when I know more, I recall that piece of knowledge and use it better.
    -Mark Van Doren

  4. #14
    Join Date
    Jul 2006
    Beans
    123

    Re: [SOLVED] Error 21 with USB drive

    Thread marked as solved.

    falcon61102 Thank you for your time and patience.
    I ended up using super grub. I downloaded it and repaired the MBR (I think)
    But I can now run the system without having to have the usb drive installed.

  5. #15
    Join Date
    Jul 2008
    Beans
    871
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Re: [SOLVED] Error 21 with USB drive

    Hey, no problem... I'm glad you got it working.

    With the way you have your system set up, Super Grub was probably the best bet anyway but sometimes it's easier/quicker to do things manually.
    Any piece of knowledge I acquire today has a value at this moment exactly proportioned to my skill to deal with it. Tomorrow, when I know more, I recall that piece of knowledge and use it better.
    -Mark Van Doren

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