I want to boot from my USB 3.0 port attached SSD. I have flashed my RPI4 with the Raspberry Pi Imager USB Boot loader.
When I attach my SSD to my USB 2.0 ports it runs flawless. But as soon I connect it to my USB 3.0 port it looks like it doesn't work. The SATA to USB3 cable blue light works in both situations so there seems nothing going wrong. My ACT (green) LED on the front is flashing very quickly 3 or 4 times and than a second not and then repeats when connected to USB3.0 ports. No difference in wether I use the upper or lower one. The flashing is so quick that I can't see exactly how many flashes it tries to show.
What can be the problem?
Bus 001 Device 001: ID 1d6b:0002 Bus 001 Device 003: ID 10c4:ea60 Bus 001 Device 002: ID 2109:3431 Bus 002 Device 001: ID 1d6b:0003 Bus 001 Device 004: ID 152d:0578