All NVMe disks are not equal it seems. Had issues getting my Pi5 to boot using a spare NVMe drive I had. Fan whirring non stop and nothing booting.

Booting from SD I can see, read and write to the NVMe drive.

Thought it might be the Pi4 PSU I was using so ordered a Pi5 PSU that arrived today. Same issue.

Swapped the "Union Memory" branded one for an SKHynix one and worked perfectly fine.
#rasperberrypi #pi5