nvme for cache: unmountable - unsupported or no file system

[SisuCH]

I have the problem with my nvme. that I want to use for the cache. 
Every time I format it, "unmountable - unsupported or no file system" always appears afterwards 

What can I do so that it works and I can use it as a cache?

I am very new to Unraid.

[trurl]

Attach Diagnostics to your NEXT post in this thread.

[SisuCH]

Sorry for that. Here is the zip

miniteufel-diagnostics-20240228-1709.zip

[trurl]

What do you get from command line with this?

lsblk

 

[SisuCH]

 I get this displayed. 

[JorgeB]

Reboot and try to format again, it should work then.

[SisuCH]

Thank you very much