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I had a perfectly working dual-boot, but last week I plugged in an SSD of 250GB to install Ubuntu 19.10 on (Among existing Windows 10 (128GB SSD) and Ubuntu 18.04 (800GB-ish) installation). Unfortunately, it did not turn out to be as easy as expected. The problem is as follows.

Whenever I boot my system, I only get to choose between Ubuntu 18.04 and my new Ubuntu 19.10 but no windows is found by the GRUB2 bootloader. To solve the problem I ran the boot-repair tool on my new system which gave me the following information dump:

https://paste.ubuntu.com/p/8r4rpB5SVv/

Focussing on the repair suggested by boot-repair I would have to create a >1MB, unformatted filesystem with bios_grub flag. However, this gives me two problems as well. Assuming it is desired that I created this partition on my new drive, I am unable to adjust the partitions on this active OS (obviously... I suppose). The second problem is that I am unable to flag an unformatted filesystem, the program does not allow me to manage these flags.

If any information is missing, please let me know and I will update my post.

I hope someone is able to help me with this problem.

Thanks!

Max Vasterd
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1 Answers1

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Apparently, the boot repair does work on the Ubuntu 18.04 system. After which I performed a sudo update-grub to get my windows system & ubuntu 19.10 system in the bootloader of the /dev/sdc5 drive.

I don't understand why this is works. So, if someone can clarify this it would be greatly appreciated.

Cheers

Max Vasterd
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