Thanks. There are a couple of reviews on the hub that say it backfeeds the Raspberry Pi 4b.Reading more I think this is a “backpower” issue and, interestingly, everything seems to work fine without the USB hub. Do I really need a powered hub for an NVME drive? Any way I could get some kind of data corruption without one?
Could be. If your hub puts anything on the D+/D- pins it will confuse the PMIC and stop the Pi booting.
Regarding the 15W mentioned above, that isn't the applicable limit. That's what the recommended PSU can supply.
The limit for bus powered USB devices is 6W (1.2A @ 5V) and that's shared not per device.
I am going to try https://www.amazon.com/dp/B07G8CMR18/re ... _simp_item Powered USB Hub 3.0, Atolla 7-Port USB Data Hub Splitter with One Smart Charging Port and Individual On/Off Switches and 5V/4A Power Adapter USB Extension for MacBook, Mac Pro/Mini and More instead which per reviews seems to play nice with RPi4b.
Statistics: Posted by rpi4newbie — Thu Dec 05, 2024 9:16 pm