I have a raspberry Pi 4 that was fine for months if not a couple years.
It boots from attach USB storage on NVME.
I did a rpi-update, and now it isn't booting.
Now before everyone says don't do that. I have done this 40+ time successfully without any issues of any kind.
I plug the USB device into another computer, and checked the file system they all check out and there are no errors on any of them.
Question? How do I restore booting from USB?
I get 4 or 5 long green flashes following by another 4 or 5 short/fast flashes of the green led. Red is solid.