Hi,
I've been looking around online for a good visual based drive performance tool compatible with Linux. All I have found are terminal based programs with limited features. I am primarily trying to test SATA and NVME drives.

Here are requirements for test tool:
1. Ability to write/read continuously
2. Ability to run test to verify drive is working correctly (Functional Test).
3. Store results of test in file
4. Store smart data

It would also be nice to be able to test multiple drives at the same time, but not a requirement.

Any help is appreciated.

Linux distro: Ubuntu 20.04.2

Take a look at the Phoronix test suite.

https://www.phoronix-test-suite.com/

I usually suggest that one use the OEM drive diagnostics.