Before I describe my problem here is an overview of the setup I want to run.
Pi Model 3B+.
Official PI power supply feeds active 4 port USB Hub.
The USB Hub is hooked up to the Pi (top right port).
1 of the HUB ports goes into USB-SATA converter with 2.5 HDD.
Second HUB port goes via MicroUSB cable to power port of Pi.
First issue I experienced was that afer shutdown I unplugged the Power of Pi, but red LED remained lit. Ok it seems my Hub feeds back. I read a lot about that and wanted to remove this 'issue'.
Instead of cutting the red line in the USB I used tape to cover the right pin in the plug (VCC).
After then again powering up the setup the Pi does not recognize any USB devices hooked up to the Hub.
Neither the HDD nor a Logitech Unifying dongle. When I plug those directly into thePi, no problem.
So now I have removed the tape, everything works normal. Since I now used the top left port suddenly the red LED is not turned on anymore after I shut down my Pi... what the heck? (2nd isue).
How can that be? Maybe someone can explain/help.
What do I want to achieve? Use the current Hub with HDD without backpowering...
Thanks and Best regards.