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Boot Ubuntu from a standard USB 32 GB flash drive?

Discussion in 'Hardware' started by ImDatingJava, Aug 4, 2012.

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  1. ImDatingJava

    ImDatingJava Banned Thread Starter

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    So this is my first time I'll be attempting this, and I'd like all the help I can get from those who have done it before.

    I have the .iso file for 64-bit Ubuntu stored on an SD card.

    I want to buy a 32 GB USB 2.0 drive, and then transfer the .iso of Ubuntu from the SD card to the USB drive.

    From there on, I set BIOS to boot from the blank and empty USB drive with nothing written on it but Ubuntu's disc image file.

    After all of that, is that it? Once booted from the USB, the .iso of Ubuntu will take everything on from there, or am I missing something?

    Realize that even though I'm no software/hardware expert, I'm definitely far from illiterate or terms of understanding computer operations, being a beginner software developer.

    So please help me out here or give some pointers, as this is the first time I've ever done this, so all help beforehand will be 100% appreciated.

    Here is the type of USB I'm talking about: http://www.google.com/products/cata...m=1&ie=UTF-8&tbm=shop&cid=9463826557010445792#

    PS: Please no "Google it" bit. I want someone to specifically tell me now from experience/knowledge of what to expect personally.
     
  2. DaveBurnett

    DaveBurnett Dave Trusted Advisor

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  3. Triple6

    Triple6 Rob Moderator

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    You can't just copy any ISO to a USB disk, or even a CD/DVD, and have it boot. You must make the USB device bootable first, and then extract the files, and so forth. An ISO file is a container for the files not a directly usable thing you can boot from.

    But thats all irrelevant, Ubuntu has an installer designed exactly for this, it will install and setup the USB stick so it boots and loads Ubuntu, you can find it here: http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows
     
  4. etaf

    etaf Wayne Moderator

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    i have not booted from USB but have from CD
    Here is a link to how to boot form USB

    http://www.ubuntu.com/download/help/try-ubuntu-before-you-install

    Note you do not copy the ISO onto the USB - you need to create a bootable USB using the ISO and a program that will make a bootable device
    see how to here
    http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows

    then the PC will need to be able to boot from a USB stick - that setting should be in the bios called Boot Order and you need to make the USB 1st

    hope that helps
     
  5. ImDatingJava

    ImDatingJava Banned Thread Starter

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    How will the program make the device bootable?

    What additional steps must be done, and why can't it boot directly from the .iso file without being "bootable?"

    What makes something, let's say, bootable from being able to read and write data itself?
     
  6. Triple6

    Triple6 Rob Moderator

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  7. DaveBurnett

    DaveBurnett Dave Trusted Advisor

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    Basically a USB drive is just like a normal disk - well most of the time.
    It gets formatted and the boot flag is set.
     
  8. BartSibrelFan

    BartSibrelFan Banned

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    A .iso file is just a disc image.

    BIOS passing control over to a blank device with a disc image won't do a thing - you need a boot loader, a ROM set of low-level software instructions that will take care of everything your heart desires.
     
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