The following problems occurred in me:
1) The connected hard drives were no longer detected after differently long time by the system. I had the plate then disconnect again and again, newly infected and could then only continue copying. For this reason, the stroke is not to be used actually for automatic backups for me. (If I attach the plate directly to the PCIe card there are no problems).
2.) The HUB was itself periodically, so I had to back off him and infect.
3.) The cable is very short. I have also ordered a high quality longer cable, the problems remained however.
4.) Now, after 6 months of the HUB has finally given up the ghost.