First off I know what I am doing is a bit stressful, running drive diagnostics, but all of the adapters I've tried so far have seemed kinda flakey. I think I started with a Startech from Amazon, and it kept disconnecting, so returned it. Newegg did a special on Rosewill, and I bought two and while they work for the most part, from time to time they get stuck or otherwise seem to be part of the problem. As said I am running diagnostics on 4TB and 6TB drives, so touchy operations and large and or long processes.
Good side, USB 3.0 seems to have the same speed as internal sata drives, and they basically work allowing more drives than internal sata connections without messing around and disconnecting the DVD etc.
Bad side, sometimes they stop working, often related to errors on the drive or the drive not responding. The 12v a 3.5" drive requires via external AC adapter is always on when plugged in, so drive spins up or down when you plug/unplug the power adapter from the sata adapter. The order this should be done, power to adapter, and adapter to drive was stated one way in part of directions and opposite in another. I've settled on plugging in, adapter to drive, power to adapter, USB to PC.
Good side, USB 3.0 seems to have the same speed as internal sata drives, and they basically work allowing more drives than internal sata connections without messing around and disconnecting the DVD etc.
Bad side, sometimes they stop working, often related to errors on the drive or the drive not responding. The 12v a 3.5" drive requires via external AC adapter is always on when plugged in, so drive spins up or down when you plug/unplug the power adapter from the sata adapter. The order this should be done, power to adapter, and adapter to drive was stated one way in part of directions and opposite in another. I've settled on plugging in, adapter to drive, power to adapter, USB to PC.