[ubuntu-za] Dualboot with Windows 10 and upgrade to 1703

[Charl Le Roux]

I agree, but maybe I was not clear. The installation of the creator edition
was a normal Windows updated like any other update, just a 'big' one, and
resulted in my ubuntu being trashed.

On 3 August 2017 at 11:35, Alfred Charles Stockton <alf at stockton.co.za>
wrote:

> I have made it a rule that Linux get installed after Windows, not the
> other way around.
> Apparently Linux knows what it is doing Windows not so much.
>
> > Just a word of caution to anyone who dualboots with Windows 10.
> >
> > I recently installed the 'creator edition' update (1703) and Windows
> > deleted my Ubuntu partition and grub to the extent that I was not able to
> > recover it. I had to re-install.
> >
> > It seems that Windows 10 attempted to convert my OS disk from MBR to GPT
> > and in the process ignored that fact that I had another OS installed. On
> > startup of windows it reverted to the old state, including MBR, but the
> > damage was already done.
> >
> > I did the following to recover:
> > - Reinstalled Ubuntu- after which I was not able to boot Windows.
> > - I then converted the disk to GPT using gdisk utility (booting from live
> > CD)
> > - From live CD I had to chroot into my ubuntu to install grub-efi, map
> the
> > efi partition to /boot/efi, and update grub (which did not find the the
> > windows)
> > - I then changed bios to boot using UEFI
> > - Now I was able to start ubuntu from grub via uefi(on gpt disk)
> > - To recover Windows boot I had to boot from recovery usb, use diskpart
> to
> > assign a drive letter to the efi partition.
> > - Then I had to run bootrec /scanos, bootrec /fixmbr, bootrec /fixboot,
> > bootrec /rebuildbcd
> > - I was now able to boot into Windows again but no grub
> > - I was able to boot into Ubuntu from the BIOS UEFI selection screen and
> > installed grub
> > Then:
> > apt-get install --reinstall grub-efi
> > grub-install /dev/sda
> > update-grub
> > - Now all is well and booting faster than ever (assuming it's gpt and
> > uefi)
> >
> >
> > What a desaster, it took be the best part of a day and a half to figure
> > this out. The above is not step by step but just what I can remember off
> > the top of my head.
> >
> > My take away from this:
> > - Make sure our disk is GPT partition scheme if you dual boot with Win10
> > before you update to the 1703 version.
> >
> > Hope this helps someone.
> >
> > Regards
> >
> >
> >
> >
>
>
> --
> Regards,
> Alf Stockton
>
>
> --
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> ubuntu-za at lists.ubuntu.com
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>



-- 
Charl le Roux
Mobile: +27834520405
Email: charl.leroux at gmail.com
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