What did you format the filesystem as? Can you run a sequential fio write/read mix test and see if that gets it to error? What is the output of dmesg when you start seeing errors? What are the errors you described?
Cheers
Edit: Found discussion @ https://github.com/ayufan-rock64/linux-build/issues/112 that answers most of above
Cheers
Edit: Found discussion @ https://github.com/ayufan-rock64/linux-build/issues/112 that answers most of above