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Thread: Grub2 Triple Boot Ubuntu Win 10 and Win 7

  1. #21
    Join Date
    Feb 2009
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    Ubuntu 17.04 Zesty Zapus

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    I looked at the links you provided; they all seem to point to either Win10 or Win7 64bit conversion to UEFI boot. I did not see any process given for moving Win7 32bit to a gpt partition, which I now understand is what is needed. I did some googling and found testimonies of getting Win7 to work with UEFI, but they did not provide step by step discussions on how to do so and seemed "prickly". For the act, Win7 BIOS to UEFI, I would really need some hand holding. However, if I were to try something, I believe there is no risk for me since I have each OS on a different drive.

    So it looks like I need to close out the thread as solved to the extent of what I would like to do. Still, I would love to make the alteration so that all drives show in Grub2 - maybe take a crack at it when "snowed in" here in S. California (just kidding). I will undoubted will try the challenge at at later date when I have an abundant amount of patience. And in the meantime I will do some more googling for a process that I believe I can follow.
    Last edited by mark bower; January 24th, 2021 at 09:07 PM.

  2. #22
    Join Date
    Jun 2014
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    6,315

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    I did not see any process given for moving Win7 32bit to a gpt partition, which I now understand is what is needed
    Before you begin that task, I would suggest you go to the link below which is the microsoft site which indicates windows vista and later can be booted from GPT drives.

    https://docs.microsoft.com/en-us/pre...ectedfrom=MSDN

    If you scroll about half way down that page, you will see the statements below.

    Yes, all versions can use GPT partitioned disks for data. Booting is only supported for 64-bit editions on UEFI-based systems.
    Similar info at the link below.

    https://superuser.com/questions/6423...i-based-system

  3. #23
    Join Date
    May 2008
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    2,071
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    Ubuntu 20.04 Focal Fossa

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    Just to add more fuel to the fire while you are snowed-in in Southern California:-

    You could investigate https://www.rodsbooks.com/refind/
    One of the features mentioned is
    rEFInd also supports legacy boots on some UEFI PCs
    I've not used refind, but I've seen it mentioned a few times in these fora.

    Secondly, you could also create a VM of Windows 7 (either with Windows host or Ubuntu host) for your CAD software.

  4. #24
    Join Date
    Feb 2009
    Location
    Arcadia, CA USA
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    Ubuntu 17.04 Zesty Zapus

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    @ yancek
    It appears that I was mistaken in a solution. I thot I had found some posts that said Win 7 32bit could be booted under UEFI - but did a lot of googling and found nothing to support. The conclusion seems to be what you pointed out in the Microsoft - see attachment.

    @ tea for two
    Just in case, I have emailed rodsbooks.com re his software, but no response yet.

    I am going to gracefully pull out of further pursuit in this thread, and mark this thread as solved. And in a way it is solved, I learned a bit and it is clear I cannot do what I would like to. Thanks for hanging in with me.

  5. #25
    Join Date
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    Ubuntu 17.04 Zesty Zapus

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    @tea for one - you nailed it for me. Your suggestion of looking into ReFind, a GUI boot manger, is just what I needed. Now that it is installed, the GUI boot screen gives me three choices to boot from: Ubuntu 20.04, Win10 and Win7!!!!!! I do appreciate all who tried to help.

    So my quest is definitely solved and I see I have already marked it as such. But I will return and edit this post with a lot of info on ReFind so that others might want to consider it, althoh I realize there are probably few users of Win7 32bit.
    Last edited by mark bower; January 23rd, 2021 at 11:06 PM.

  6. #26
    Join Date
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    Ubuntu 17.04 Zesty Zapus

    Re: Grub2 Triple Boot Ubuntu Win 10 and Win 7

    @tea for one - you nailed it for me. Your suggestion of looking into rEFInd, a GUI boot manger, is just what I needed. Now that it is installed, the GUI boot screen gives me three choices to boot from: Ubuntu 20.04, Win10 and Win7!!!!!! 64bit,64bit,32bit. Additionally, I do appreciate all who tried to help.

    So the key links to obtain the rEFInd boot manager are https://www.rodsbooks.com/refind/ and Rod Smith directly (who was very helpful and responsive) at rodsmith@rodsbooks.com. Following is my PC GUI boot screen image and the instructions provided by Rod. On the boot screen going left to right icon, the 1st is Ubuntu, the 2nd is Win10, and the 3rd is Win7. Added-bolded additions in the instructions are my mine. I also include some of Rod's options: 1) for keeping Grub2 from returning, which he characterizes as a "coup", and 2) how to remove rEFInd to return to Grub 2. Bottom line is that rEFInd allows one to easily boot both 64bit and 32bit on an EFI system.

    HTML Code:
    1) Set your firmware to its "UEFI and Legacy OPROM" mode.
    2) Boot to 64-bit Ubuntu. (It can be done from your 64-bit Windows 10,
       too, but it'll be harder to install that way.)
    3) Install rEFInd in whatever way you prefer, as documented at:
       https://www.rodsbooks.com/refind/installing.html
       Installing using a Debian package or the rEFInd PPA is likely to
       be the easiest way to do it.
    3a Shutdown and boot to see GUI.  Repeat a 2nd time if GUI does not show.
    4) Test that rEFInd works. At this point, it should boot either
       Windows 10 or Ubuntu, but it won't detect your 32-bit Windows 7.
       You'll probably see two Ubuntu options, one of which boots
       through GRUB and the other of which boots the Linux kernel
       directly. If you want only one, you can hide the one you don't
       want later.
    5) Boot Ubuntu.
    5a Enter "sudo su" privileged
    6) Open /boot/efi/EFI/refind/refind.conf in a text editor.
    7) Edit the "scanfor" line:  (find scanfor at line 310)
       * Uncomment the line (remove the leading "#").
       * Add "hdbios" to the list of options.
    7a) save refind.conf
    8) Reboot (two reboots may be necessary). At this point, you should see three
     more boot options, one for each of your hard disks. (Unless you have more than
       those three disks or if one or more of those disks is invisible to
       your firmware, in which case the number of extra options will
       be different.) Test each of these options to learn which one
       boots Windows 7. Make note of this option.
    9) Reboot into rEFInd again. This time, select the EFI and/or
       BIOS options (disk icons) you DO NOT want to see and hit the Delete or minus
       ("-") key. This will hide those options. See here for more
       information:
       https://www.rodsbooks.com/refind/configfile.html#hiding
    10) You can optionally remove GRUB or otherwise modify it to
        prevent it from taking over as the default boot manager, which
        it's likely to do, sooner or later, if you do nothing about it.
        See here for more information:
        https://www.rodsbooks.com/refind/bootcoup.html
    When you're done, you'll have one Windows 10 entry, one or two Ubuntu
    entries, and one entry to boot a disk in BIOS mode. That last entry will
    boot Windows 7, but it won't be labeled as such, and there's no way to
    give it a "Windows 7" label.

    Suggestion Rod Smith makes for keeping Grub2 from taking back control:
    $ sudo refind-mkdefault

    Suggestion Rod Smith makes for removing rEFInd:
    # rm -r /boot/efi/EFI/refind
    Attached Images Attached Images

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