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Thread: Booting LiveCD ISOs from USB HDD

  1. #1
    Join Date
    Oct 2013
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    Booting LiveCD ISOs from USB HDD

    Hi

    I'm new to Linux and have a possible stupid question regarding booting multiple liveCD ISOs from external HDD. I found this link in the forum (http://ubuntuforums.org/showthread.php?t=1288604) and have a few questions.

    My first question is, can this be applied to my USB External HDD? and can i use a more up to date Ubuntu live CD? Will i need to format my HDD to EXT4 before hand?

    Thanks for any help.
    Rubbiks

  2. #2
    Join Date
    Apr 2008
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    Ubuntu Development Release

    Re: Booting LiveCD ISOs from USB HDD

    That's an old topic with some great tips. I'd forgotten about the "Lua scripting language" that the op referenced.

    To answer your first question, yes it can be applied. Yes, you can use almost any ISO, as long as you know the boot sequence; Arch for example uses different kernel options.

    Regarding Ext4. No, you can and I have used vfat.

    There's a couple of ways of booting ISO directly. Grub2, gurb4dos us what I use.

    edit: It looks like the current grub2 has removed 'lua' support due to legal issues. Apparently you can use grub-extras to get it back.
    edit2: This will take some work. A blog on compiling grub with lua is found here. I personally don't need 'lua' support, as I use the loop-back method.
    Last edited by VMC; October 1st, 2013 at 10:05 PM. Reason: new information
    boot_info_script | AMD64 Athlon X2 Dual-Core - nVidia Geforce 6150 SE - 4GB DDR3

  3. #3
    Join Date
    Jun 2009
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    Ubuntu 12.04 Precise Pangolin

    Re: Booting LiveCD ISOs from USB HDD

    It does not matter if hard drive or flash drive. I use both flash drives and internal hard drives. And have used NTFS, FAT32, ext4 and on flash ext4 with journal turned off. But I use grub2 to loopmount ISO. Only applies to BIOS not UEFI. And if Linux formatted you will need to open up permissions to make it easier to use.

    The boot drive in BIOS is always hd0. Most flash drives have one partition so it would be (hd0,1) but with hard drives it may be any partition or even on another hard drive, so you may have to adjust if grub is installed and booting from one drive and /boot/iso folder is one another drive.

    Different versions do have changes. I have only been able to boot Ubuntu desktop versions, not server nor alternative. And they sometimes change something. Most recent use vmlinuz.efi even for BIOS. Examples boot stanza link below also shows that difference.

    This will boot an ISO from a hard drive.
    ISO Booting with Grub 2 from Hard drive - drs305
    https://help.ubuntu.com/community/Grub2/ISOBoot
    Examples - you may copy & edit for your path & ISO version
    https://help.ubuntu.com/community/Gr...OBoot/Examples
    http://ubuntuforums.org/showthread.php?t=1549847
    Boot ISO from harddrive. To install it would have to be different partition
    [SOLVED] Using grub 2 to boot an iso off hard drive old examples
    http://ubuntuforums.org/showthread.php?t=1535864
    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.







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