Hey @bauz007,
Rest assured, it is still valid. The only part to pay attention to is EEPROM version as the guide references ones available in February.
Interesting statement. I tried literary this minute and and it all works.
Question: Did you actually read second subtopic Preparations at all?
I have a suspicion that you’ve been trying using aforementioned commands within Volumio OS.
Please revisit preparation guide and adjust your Raspberry Pi 5 to your requirement.
Also, take a look at the PCIe NVMe compatibility where there are discussion related to the NVMe devices as such.
Once all preparations are completed and you are still facing slowness please post the link of your debug log here.
Kind Regards,