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Thread: Ubuntu 21.10 Installation Failed to Find SSD Partition

  1. #1
    Join Date
    Oct 2021
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    Ubuntu 21.10 Installation Failed to Find SSD Partition

    I have a MSI GS66 laptop with Nvidia RTX3060. It has dual boot Windows 10 and Ubuntu 21.04. I would like to reinstall the Ubuntu partition to 21.10. I downloaded Ubuntu 21.10 installation iso file and created a bootable usb flash by using Rufus tool. Then I logged into Windows 10 and had the Ubuntu 21.04 installation partition deleted. I rebooted the laptop to start the installation. However in the installation wizard it didn't show any installation type. If I clicked Install Now to install Ubuntu, it showed the following errors: "No root file system. No root file system is defined. Please correct this from the partitioning menu." Fast boot was disabled. Something must be broken in Ubuntu 21.10 installation process as I had no such issue when I installed Ubuntu 21.04 on the same laptop. I left 600 GB SSD for Ubuntu. The installation wizard failed to find such partition.
    Last edited by ajgreeny; October 17th, 2021 at 09:10 PM. Reason: Title changed. I meant Ubuntu 21.04 and 21.10.

  2. #2
    Join Date
    May 2008
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    Ubuntu 20.04 Focal Fossa

    Re: Ubuntu 21.10 Installation Failed to Find SSD Partition

    Ubuntu 20.10 is now unsupported (end of life).

    Did you mean Ubuntu 21.10?
    Last edited by ajgreeny; October 17th, 2021 at 09:11 PM.

  3. #3
    Join Date
    Jun 2014
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    Re: Ubuntu 21.10 Installation Failed to Find SSD Partition

    Use the Something Else option and in the Installation Type window you need to select the partition on which you had your previous install of Ubuntu. In the lower left part of that window you will see Change, click on that and you will get the Edit partition window which will give you several options. One of these is Mount point. Click the down arrow and you will see several options. The first one should be the symbol for root "/: so click that and proceed. Failing to do this is the reason you see the "no root filesystem is defined" error. Scroll about half way down the page at the link below to see a graphical image of this.

    https://www.tecmint.com/install-ubun...ows-dual-boot/
    Last edited by ajgreeny; October 17th, 2021 at 09:12 PM.

  4. #4
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    Oct 2021
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    Re: Ubuntu 21.10 Installation Failed to Find SSD Partition

    Yes. Sorry for the typo. It is Ubuntu 21.10.
    Last edited by ajgreeny; October 17th, 2021 at 09:13 PM.

  5. #5
    Join Date
    May 2008
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    Ubuntu 20.04 Focal Fossa

    Re: Ubuntu 21.10 Installation Failed to Find SSD Partition

    Quote Originally Posted by airbot View Post
    Then I logged into Windows 10 and had the Ubuntu 21.04 installation partition deleted.
    Having deleted the target partition, then the installer would not be able to install into a non-existent partition.
    You have to create a partition and then select it so that the installer can proceed.
    yancek's link displays Create Ubuntu Root Partition

    I think that your difficulty arose because you deleted the original Ubuntu partition when you could have over-written it with a fresh installation.

    Make sure that you have booted in the correct mode (probably UEFI if you already have Windows 10)
    Info here https://help.ubuntu.com/community/UEFI
    Last edited by ajgreeny; October 17th, 2021 at 09:14 PM. Reason: Added comment about UEFI

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