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Thread: "Prefix not set"-error when a disk has GPT

  1. #21
    Join Date
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    Ubuntu 12.04 Precise Pangolin

    Re: "Prefix not set"-error when a disk has GPT

    Quote Originally Posted by oldfred View Post
    Sorry, Missed that was the answer.

    I am out of ideas, but lets run BootInfo and see if it says anything else. It may or may not boot as it has some slightly different configurations.

    Post the link to the BootInfo report that this creates. 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.
    Install in Ubuntu liveCD or USB or Full RepairCD with Boot-Repair (for newer computers)
    But the computer can't even boot with a live-CD without removing the 4TB-disk, and that is the problem.

  2. #22
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    Ubuntu 12.04 Precise Pangolin

    Re: "Prefix not set"-error when a disk has GPT

    Will it boot gparted liveCD or Knoppix or any of the other repair type Linux systems?

    http://partedmagic.com/
    http://gparted.sourceforge.net/faq.php


    http://www.knopper.net/knoppix-mirrors/index-en.html
    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.







  3. #23
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    Re: "Prefix not set"-error when a disk has GPT

    Quote Originally Posted by oldfred View Post
    Will it boot gparted liveCD or Knoppix or any of the other repair type Linux systems?

    http://partedmagic.com/
    http://gparted.sourceforge.net/faq.php


    http://www.knopper.net/knoppix-mirrors/index-en.html
    Don't know. Should we test that, with the 4TB-disk connected?

  4. #24
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    Re: "Prefix not set"-error when a disk has GPT

    I don't know how, but I cloned the disc to a USB flash drive using dd, and Ubuntu booted.

  5. #25
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    Re: "Prefix not set"-error when a disk has GPT

    So is it just a defective drive?

    Even new drives can be defective.
    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. #26
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    Re: "Prefix not set"-error when a disk has GPT

    Quote Originally Posted by oldfred View Post
    So is it just a defective drive?

    Even new drives can be defective.
    No, the drive wasn't defective. Ubuntu just didn't want to boot using a CD. Don't ask me why...

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