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I have tried to install Ubuntu 20.4 and I already have windows 10.

During installation, I choose install Ubuntu alongside windows 10 and these error appear :

error1 error2

and after that , it appears : error1

I also have enough unallocated storage for ubuntu (more than 200 GB)

My HDD style was MBR, I also tried in GPT style. But I saw the same error. I again changed it to MBR.

What should I do now? Thank you so much.

Hayeri
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  • In UEFI or Legacy? If UEFI, what is the size of /boot/efi? How much empty space it have? – kashish Aug 06 '20 at 09:17
  • It is legacy. thank you. – Hayeri Aug 06 '20 at 09:51
  • You mean my unallocated spase? – Hayeri Aug 06 '20 at 12:34
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    If drive is gpt partitioned (which I recommend), you need either an ESP - efi system partition(300 to 500MB FAT32 with boot flag) for UEFI boot or a bios_grub partition (1 or 2MB unformatted with bios_grub flag) for BIOS boot. Only use MBR, if installing Windows in BIOS boot mode as that is required by Windows. Make sure Windows fast startup is off. http://askubuntu.com/questions/843153/ubuntu-16-showing-windows-10-partitions – oldfred Aug 06 '20 at 14:07
  • Could you explain more what should I do? I mean how should I build an ESP-efi system partition or even how to bios_grub partition. @oldfred – Hayeri Aug 09 '20 at 07:18
  • If UEFI system better to use UEFI. UEFI/gpt partitioning in Advance, new versions do not need swap partition: http://askubuntu.com/questions/743095/how-to-prepare-a-disk-on-an-efi-based-pc-for-ubuntu & https://askubuntu.com/questions/343268/how-to-use-manual-partitioning-during-installation You can also use gparted but must change default partitioning first. Select gpt under device, advanced over msdos(MBR) default partitioning before starting. gparted & fdisk instructions: https://help.ubuntu.com/community/InstallingANewHardDrive The bios_grub is selected with right click in gparted. – oldfred Aug 09 '20 at 14:20
  • I know it is too late, but I just wanted to say thank you. – Hayeri Sep 18 '21 at 05:58

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