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I had Ubuntu 17.04 installed on my Razer Blade 14.

I then connected an SDSSDA / Sata 6G/s external drive via USB 3.0 and installed Ubuntu 17.04 via a USB stick. Booted into it and used it successfully.

Then I shut down, disconnected it, inserted my official Razer Windows 8.1 recovery USB stick and reinstalled - intentionally replacing Ubuntu. And began using Windows 8.1 successfully.

Then I shut the computer down, plugged in my external drive again and rebooted, expecting to see an option to choose which drive to boot into. I was not prompted to so I reboot and held F12 until the boot menu appeared. I expected to see my external drive listed, but it's not. Only Windows.

Therefore I cannot boot back into Ubuntu on my external drive.

I read something about that possibility that it has something to do with GRUB vs DOS, but couldn't get any clarity on how to reinstall GRUB alongside DOS - or any other alternative approaches.

Can anyone help me understand what is happening and point me to any tutorials that would teach me how to resolve this issue? If there are none, could someone share any insights that can help me further debug?

Spencer Hill
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4 Answers4

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You should try and reinstall Grub via a live session. As described in this post.

Biggybi
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Or you can install EasyBcd on Windows, configure Windows bootloader to include Ubuntu's GRUB in OS list, and you're all set.

Bagas Sanjaya
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I tried Boot Repair, EasyBSD, manually reinstalling Grub on the same partition as the Windows boot loader, but I ended up installed rEFInd, then reinstalling Ubuntu. The solution I was seeking was to do this without reinstalling Ubuntu but it seems that is not possible when dealing with UEFI. Or if it is, it's beyond my skills.

Spencer Hill
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Maybe you should change BIOS setting to Legacy and try to reinstall both Windows and Ubuntu. Some Linuxes don't know how to deal with EFI's secure boot option so you should also disable Secure Boot.

Bagas Sanjaya
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