I finally couldn't stand it anymore and bought a Thunderbay, but prior to that I was using a USB3 Startech dual bay (UASP version), and when that was having read/write errors and disconnects randomly, I bought Mediasonic enclosures (Mediasonic ProBox HDL-SU3). The Mediasonic enclosure, when plugged in, causes my Mac to take *ages* to startup. Yes, I have the proper startup disk selected in my System Preferences. It's just something to do with the enclosure.. what causes this?? It also doesn't allow for SMART status, whereas my Startech bay did. Doesn't matter because both the Mediasonic and Startech crapped out randomly. The new Thunderbay has no problems whatsoever - full SMART status, fast booting, no disconnects at all. It's fantastic. But for future purposes, I want to do know how I'm supposed to tell if I'll have issues with USB3 disconnects, slow bootup, disconnects, etc. Is it the chipset? Is there a proven chipset I should look for?