I built a RAID-1 array in one of these. https://www.newegg.c...2-054-_-Product Except I'm using the older model, without eSATA, only USB3. It used to work fine, but now it only connects at USB2 speeds. I tried different cables and different PCs and the problem persists. Since USB2 is already a bottleneck when transferring data to an HDD, and since there are two HDDs in there, meaning that everything needs to be sent down the wire twice, it makes performance even shittier than a USB2 enclosure would be.
I tried cycling between JBOD mode and spanned mode with extra disks and that didn't solve the problem. One observation I made is that the indicator LEDs flash to indicate the connection speed. They flash slow when on USB2, and they flash fast when in USB3 mode. When I cycled modes (an operation that takes place inside the enclosure itself), the lights flashed quickly as they do when on USB3 speed. So now I'm wondering if the female USB3 plug on the rear of the enclosure is damaged and only the leads for USB2 are making contact. If only I had a volt meter, I could test the solder points on the rear of the PCB in the enclosure against the other end of the USB cable and ensure that they are all working.
Edited by kano, 15 April 2018 - 03:16 PM.