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I was trying to reinstall ubuntu 18.04 and ended up installing it both on my 1 TB and 2TB harddisk. My system is not booting up now unless I go to BIOS and select SATA boot drive. There is no longer any efi boot option which earlier was present.

How do I fix this? Also how do I make sure that there is only one ubuntu installation and the other one is deleted? I am not very good at jargon of ubuntu so please pardon the ignorance.

Ben Bitdiddle
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  • Can you disconnect the drive you do not want the OS installed on, do a complete reinstallation, reconnect the disconnected storage device, then format the sucker so it’s empty? It’s a pain in the bum, but a very simple way to ensure expected results – matigo Nov 19 '22 at 08:08
  • Can't I simply boot from one harddisk and format the another? I am already booted from one hard disk. Also why do I have to go to BIOS to boot everytime? Why is it not normally booting? – Ben Bitdiddle Nov 19 '22 at 08:11
  • Reformat the one you don't want by using a live USB in GParted. – Rishon_JR Nov 19 '22 at 08:11
  • @matigo it is not possible at the moment to physically disconnect the harddrive. – Ben Bitdiddle Nov 19 '22 at 08:12
  • When you reinstalled It sounds like you did it in legacy mode and not UEFI mode. https://askubuntu.com/questions/927924/how-to-install-ubuntu-in-uefi-mode#928101 – PonJar Nov 19 '22 at 08:19

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Step 1: Boot into the Live Installation USB
Step 2: Click on Try Ubuntu, Instead of Install Ubuntu
Step 3: Press the Windows Key and start Typing GParted(It will start searching for Gparted)
Step 4: Open GParted
From here, I can Link a guide for you. How to format a drive\

Follow the Third Method of the article

Rishon_JR
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