Ubuntu-22.04 WSL 1 failed to upgrade to WSL 2

[jippy89]

Version

Microsoft Windows [Version 10.0.19044.2604]

WSL Version

• WSL 2
• WSL 1

Kernel Version

No response

Distro Version

Ubuntu-22.04

Other Software

No response

Repro Steps

Run on Powershell Adiministrator
wsl --set-version Ubuntu-22.04 2

Expected Behavior

Current distro upgraded to WSL 2

Actual Behavior

Logs after I ran wsl --set-version Ubuntu-22.04 2

For information on key differences with WSL 2 please visit https://aka.ms/wsl2
Conversion in progress, this may take a few minutes.
Importing the distribution failed.
Error code: Wsl/Service/WSL_E_IMPORT_FAILED

Diagnostic Logs

No response

[jippy89]

I've actually tried exporting and importing, but it failed at the import part. The following is the command I ran,
wsl --import Ubuntu-22.04-wsl2 C:\Users\user\Ubuntu-22.04-wsl2\ My_Ubuntu-22.04.tar

I'm on C:\Users\user\ and the file name is My_Ubuntu-22.04.tar.

[jippy89]

Eh.. something worked..? I tried running the following at it resulted differently

wsl --import ubuntu-2 "C:\Users\user\wsl\ubuntu-2" .\My_Ubuntu-22.04.tar

[tzachbon]

Having the same issue, how did you solve it?

[jippy89]

Eh.. something worked..? I tried running the following at it resulted differently

wsl --import ubuntu-2 "C:\Users\user\wsl\ubuntu-2" .\My_Ubuntu-22.04.tar

I ran different command @tzachbon. I think it has something to do with the path.

[jippy89]

If you checked carefully, I ran 2 different command of wsl --import, the first one didn't work, the second one did thought. I really don't know myself. It could be the name, it could be the path file we're referring to, idk. I'm really surprised and just happy that it worked.

There's whole other similar issues in other thread, I tried following them but none of them worked.

[antsmallant]

The most possible reason is your disk space is not enough。If you have another disk which has enough space，You may export to that disk，and then reimport。

I will show you an example（1. my disk c: is lack of space，but disk d: has enough；2. my dist version is ubuntu-20.04）
Steps:

1. wsl --export Ubuntu-20.04 d:\wsl-ubuntu20.04.tar
2. wsl --unregister Ubuntu-20.04
3. wsl --import Ubuntu-20.04 d:\wsl-ubuntu20.04 d:\wsl-ubuntu20.04.tar --version 2
4. ubuntu2004.exe config --default-user
5. del d:\wsl-ubuntu20.04.tar