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Thread: GUIDE: (U)EFI installation

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  1. #1
    Join Date
    Apr 2011
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    35

    GUIDE: (U)EFI installation

    BACKGROUND
    EFI is a replacement of the older BIOS. If your motherboard supports EFI, this is how you use it.
    I have read a bunch of different guides/howtos, but i thought none of them were easy enough, or they where outdated. Here comes my version...
    INSTRUCTIONS
    EFI uses a whole partition (ESP=EFI System Partition) instead of the first 512B at the first sector as MBR does. A partition has to be reserved for that (see below).
    First you need a EFI bootable device with your favorite distro on. Use a USB memory, because most (?) CD/DVD readers does not seem to boot the OS into EFI mode, and will therefore not be able to automatically install EFI.


    • Create a bootable USB live "CD".

    • Boot into the live CD (USB).
    • Format the disk with a GPT partition table with for example gparted [screenshot 1].
      (Device -> Create Partition Table... -> GPT)
    • Start installation, create the desired partitions and make one of them the ESP [screenshot 2-3].
      (The EFI partition choice will not appear unless the live CD is booted into EFI mode.)
      The ESP does not necessarily have to be the first one in the partition table.
      I choose a 16MB ESP as the last partition in the table.
    • In the UEFI BIOS settings make sure all EFI bootable devices are ahead of the MBR devices in the boot order [screenshot 4].
      (Otherwise the empty DVD reader can rule out the EFI compatible hd, that you've put after the DVD in the boot order and the boot will stall.)
    NOTES

    • If you want to be able to dualboot with MS Win, then the ESP has to be FAT32. Most linux distros choose FAT16 as default (but handles FAT32), you can either preformat the ESP with FAT32 or covert it to FAT32 later on.
    • Be sure to download the 64-bit version of the OS if you have a 64-bit CPU, otherwise it won't boot using EFI.
    SCREENSHOTS

    Last edited by niglas; April 23rd, 2012 at 11:18 PM.

  2. #2
    Join Date
    Oct 2008
    Location
    germany
    Beans
    183
    Distro
    Ubuntu 13.04 Raring Ringtail

    Re: GUIDE: (U)EFI installation

    hi niglas,

    thank you for your efi-guide, it's very well done.
    I'll try to make an ubuntu-efi-install alongside with windows depending on your guide)when 12.04 is finally out.
    Please keep on with your fine guide.
    I believe for a lot of people it will be helpful.

  3. #3
    Join Date
    Dec 2007
    Beans
    9,738
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    Lubuntu 16.04 Xenial Xerus

    Re: GUIDE: (U)EFI installation

    Quote Originally Posted by pulpo69 View Post
    hi niglas,

    thank you for your efi-guide, it's very well done.
    I'll try to make an ubuntu-efi-install alongside with windows depending on your guide)when 12.04 is finally out.
    Please keep on with your fine guide.
    I believe for a lot of people it will be helpful.
    A big +1.
    There's virtually no easily understandable how-to for installing Ubuntu (as a dual boot) onto a UEFI PC that already has Windows installed.

  4. #4
    Join Date
    Dec 2006
    Location
    Canada
    Beans
    Hidden!
    Distro
    Ubuntu 15.10 Wily Werewolf

    Re: GUIDE: (U)EFI installation

    Thank you for this guide. On my UEFI capable system, I set up a dual boot by first disabling UEFI in the BIOS and selecting 'legacy' mode instead. When I upgrade to 12.04, I might try to do a UEFI installation.

    Are there any clear advantages to a UEFI boot over the legacy mode?

  5. #5
    Join Date
    Apr 2011
    Beans
    35

    Re: GUIDE: (U)EFI installation

    Some of the advantages:

    • Faster boot time
    • Support for boot disks >2TB
    • Improved graphics
    • IPv6 support

  6. #6
    Join Date
    Nov 2009
    Location
    Montréal (Québec)
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    165
    Distro
    Ubuntu Development Release

    Re: GUIDE: (U)EFI installation

    Hi niglas,

    Thanks for the explanation. I'm trying to follow your steps but using Gparted 0.12.1 (the latest) I'm not offered the "EFI start partition" option as an available format as you have in screenshot 2. Any idea why?

    Regards,

  7. #7
    Join Date
    Oct 2008
    Location
    germany
    Beans
    183
    Distro
    Ubuntu 13.04 Raring Ringtail

    Re: GUIDE: (U)EFI installation

    Quote Originally Posted by vasa1 View Post
    A big +1.
    There's virtually no easily understandable how-to for installing Ubuntu (as a dual boot) onto a UEFI PC that already has Windows installed.
    I agree. And more and more efi-boards are on the market.

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