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Thread: How can I boot the USB uing Grub2 in the hard disk?

  1. #11
    Join Date
    May 2009
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    266

    Re: How can I boot the USB uing Grub2 in the hard disk?

    Plop: http://forum.plop.at/index.php/topic,1157.0.html
    --------------

    If there is any chance to boot a linux system out of an USB drive in an Apple, I think that the first try should be to boot the system in the usb from instructing Grub2 to do it. If it works, then add the entry in grub's menu configuration.

    How would this be done with Grub2 (with grub1 it didn't work in a compatible PC).
    Last edited by HotForLinux; April 15th, 2012 at 04:36 PM.

  2. #12
    Join Date
    May 2009
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    266

    Re: How can I boot the USB uing Grub2 in the hard disk?

    I downloaded plop and booted plop from grub2, like this:

    Code:
        set root=(hd0,3)
        linux16 /home/toni/Desktop/plpbt-5.0.14/plpbt.bin
    It looks like star wars but I can't boot the system in the USB and it gives me less info than grub2, which at least says that it doesn't know the geometry (C/H/S) to boot the USB. Actually I don't see what can you do with plop that you can't with grub2.

  3. #13
    Join Date
    Jun 2011
    Beans
    1

    Thumbs up Re: How can I boot the USB uing Grub2 in the hard disk?

    (on my Macbook Air 3.1)
    to make it simple
    on your usb key
    create 1 primary partition format it (FAT32 + bootable flag)
    (this partition has to be the 1st one)
    use the "Startup Disk Creator" to built the usb key
    reboot
    press Alt
    you now can see another orange icon
    select it
    and you get into a grub2 menu
    select the 1st entry
    it will start the live ubuntu

    N.B.: Refit isn't necessary to boot from a live USB

    keep in mind that NOT ALL OF THE ISOs WILL BOOT!
    for exemple
    kubuntu 12.04 amd64 works
    kubuntu 12.04 amd64+mac doesn't work
    MultiSystem doesn't work
    ubuntu 12.04 amd64 not tested

    to make to the +mac version bootable (on the macbook air)
    use the "Startup Disk Creator" to built the kubuntu 12.04 amd64+mac usb key
    then copy the folders "efi" and "boot/grub" from kubuntu 12.04 amd64
    and paste on the kubuntu 12.04 amd64+mac usb key
    the efi folder and its content provide the orange icon mentioned above
    the boot/grub folder and its content provide the grub folders for boot sequence

    NB: on my PC the same usb key uses syslinux boot components (not grub2) and displays the typical Kubuntu blue screen
    on my macbook it uses grub to display the grub menu
    Hope this helps

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