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on my HP laptop, Ubuntu 21.04 is installed. I wanna partition my disk to have both Ubuntu 21.04 and 20.04. So I made a booting USB and plugged it to partition the existing disk into two. However, when booting through the USB, gparted in "Try Ubuntu" mode cannot detect the other disk.

How can I fix it? Or, I don't want it, but can I remove the Ubuntu 21.04 and just install Ubuntu 20.04?

  • When booting on laptop disk enter image description here

  • When booting on USB disk enter image description here

Jinrae Kim
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    Where did you obtain Ubuntu? I can see from your screenshot that your live USB is either outdated or it is not genuine Ubuntu. The currently available version of Ubuntu 20.04 is 20.04.4. So I would start by ensuring that you have valid, up-to-date installation media. – Nmath Jun 25 '22 at 02:02
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    Your installed 21.04 is using the 5.11 kernel stack, however your picture shows an older kernel in live mode, ie. what is likely only a 5.8 kernel which is no longer supported (5.4 is the supported GA kernel, or HWE is currently 5.13). Your difference is likely the kernel & likely oudated media as @Nmath has already suggested - did you scan the kernel boot logs? – guiverc Jun 25 '22 at 02:43
  • Thank you for your replies. The booting USB was made a while ago, so it might be the problem. I'll try it again. Now, I forgot to bring the battery charger, so I can try it next week :( – Jinrae Kim Jun 25 '22 at 02:53
  • Does this answer your question? Does upgrading Ubuntu via a stick destroy existing files? – karel Jun 25 '22 at 05:49
  • Do you want the same data in both systems? Best not to share /home as that includes user settings that you may not want the same or are incompatible. But you can create a data partition, copy/move data into it, and mount it in both installs. Shrink current install. Create new partiiton for / & large partition for data. you then later can install 22.04 over obsolete 21.04 and mount data into it. https://askubuntu.com/questions/1013677/storing-data-on-second-hdd-mounting & https://askubuntu.com/questions/1058756/installing-all-applications-on-a-ssd-disk-and-putting-all-files-on-hdd-disk – oldfred Jun 25 '22 at 16:42
  • Thank you all, the problem was the outdated image on the USB. Also, installing a different version alongside the other is pretty easy cuz Ubuntu installer provides the functionality by default! – Jinrae Kim Jun 27 '22 at 16:48

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