Convert legacy/BIOS Windows to UEFI Windows for dualbooting




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    Trương Bá Việt Nhân

    Are there any help? Could Cloudready get installation on PC with BIOS (none-UEFI) system based?

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    Dinh Hoang

    Same question with Truong Ba Viet Nhan. I have an old laptop with legacy mode, windows 7 and want to dual boot Cloudready. Are there any guides for manual steps?

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    Forrest Smith

    There is no way to use our pre-built dualboot installer if your machine only supports legacy BIOS. You have to have a machine that at least is *capable* of UEFI booting.

    If you want to dualboot on a Legacy-only machine, it is definitely possible but will require you to manage the process of installing and configuring grub or Windows boot manager to let you choose between the two at boot. You'd probably need to install CloudReady first, and then resize the storage and install Windows second.

    Unfortunately, we don't have a way to help or guide you through this.

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    Chas Belfield

    That's a shame, I have a Lenovo S10-3 that I have Lubuntu 16.04 installed on and would have loved to dual boot with cloud ready, but unfortunately it is not UEFI capable.

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    Below how i did it:
    1) Create USB drive with cloudready
    2) Install on the second usb drive Gparted live
    3) Boot from second drive (Gparted live).
    4) Create two partition with gparted: first ext4 (min 4GB) and second ext2 (min 2 GB)
    5) Copy partition ROOT-A from CloudReady usb drive to created ext2 partiton
    6) Copy partition STATS from CloudReady usb drive to created ext4 partiton
    7) Mount new ext2 partiotion with gparted live.
    8) Edit file /sbin/chromeos_startup. You need find where set variable STATE_DEV. And change it to you new ext4 partiton. (for example STATE_DEV=/dev/sda7)
    9) Install GRUB4DOS in Windows and add record for chromeOS:
    title ChromiumOS
    insmod ext2
    set root=(hd0,5)
    kernel (hd0,5)/boot/vmlinuz root=/dev/sda6 rw noresume noswap i915.modeset=1 loglevel=1 cros_debug quiet

    Change (hd0,5) to you created ext2 partition number.

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    Forrest Smith

    Hi Anton!

    Very cool! I haven't seen any approach like this before.

    Note that updates won't work in this configuration, since CloudReady uses a double-buffered update system and relies on both ROOT/KERNEL-A and ROOT/KERNEL-B (alternately) to allow for background install of updates.

    I'm not certain as to how that switch back and forth is specified so I don't think I can coach you through recreating that, but hopefully this tip can give you a starting point.

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    Kyle Sodano

    A possible alternative to the unofficially supported method above, it seems like Windows 10 Build 1703 (otherwise known as the Creators Update) being released on 4/11/17 will include the MBR2GPT.EXE utility. From Microsoft Technet:

    MBR2GPT.EXE converts a disk from Master Boot Record (MBR) to GUID Partition Table (GPT) partition style without modifying or deleting data on the disk. The tool is designed to be run from a Windows Preinstallation Environment (Windows PE) command prompt, but can also be run from the full Windows 10 operating system (OS)

    See my other post for my automation scripts based on this article's method and more on the MBR2GPT.EXE utility:

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    Hoc Nguyen Triet

    Great news @Kyle Sodano. But I cannot access your article anymore...

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