If that was an unpowered hub then I would not expect it to work. The Pi is not designed to have an unpowered hub plugged into it. If anything did work it would be by luck and would tend to be unreliable.r4049zt wrote: The lower of the two USB sockets was insufficient to run four USB memory sticks plugged in via a usb to 7-way usb adapter. The power socket at the adapter showed less than 3 Volts. Switching its power-from-raspberry-pi to off, and connecting four NiCAD rechargeable batteries to the 7-way usb block, that got 5.1 Volts at the usb block, off a separate battery supply to the raspberry pi.
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