Using a 2015 iMac, I have a StarTech dock plugged in via USB3 and very often when I eject a drive and put another one back in, the dock powers up though nothing mounts. I have to turn it on and off, and unplug and plug back into another usb port, over and over before it recognizes it. Is this a known issue or is it an issue with my dock? This problem occurs with multiple drives, so I have ruled the issue with the drives out. Thanks.