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First of all, I have a new laptop Acer Aspire A315-53-386P with Windows 10. I was starting to install Ubuntu in the computer and then

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I didn't understand the problem, so I investigated and I erased the secure boot and nothing. I want to erase Windows and install Ubuntu.

I read many sites, included How to use manual partitioning during installation?, but they didn't helped me, all of them say me about a step 4, but my step 4 is this:

enter image description here

You must know that I am some beginner so really, any idea is useful.

Boris Valderrama
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1 Answers1

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I read this 2 forums and I found the solution

Then I wrote in the terminal

ubuntu@ubuntu:~$ sudo dmraid -Er /dev/sda

Then the terminal show me a message like Do you really want to erase "isw" ondisk metadata on /dev/sda ?, I wrote y (yes) and enter. This works and I can see the partition menu with normality. I don't know why this works, but did it.

Boris Valderrama
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  • Add command didn't work on mine. It threw, "no block devices found" message because there is no /dev/sda drive. – Pranav Apr 15 '21 at 09:19