The Industrial Raspberry Pi Forum

This is not a question of RevPi Core because we do not manufacture the SoC. We use the original Compute Module 3 (CM3) from Raspberry which comes with a non changeable boot ROM inside the SoC containing the boot loader. Our information from the foundation is that there is no possibility for the CM3 to use the USB mass storage boot mode of Raspberry 3. With CM3 light it might work but that does not really help unless you want to open your core's case and exchange the CM3 against a CM3L.