TERRAMASTERD6-320 External Hard Drive Enclosure - USB 3.2 Gen2 10Gbps Type-C HDD Storage Hot Swappable Plug and Play (Diskless)

I purchased the D2-320 2-bay RAID enclosure with USB 3.2 Gen 2 10 GbpsMy purpose with this unit was to mirror (RAID1) two 6TB WD Reds with a Linux machine. I’m not familiar with this brand, so I decided to test it a little before copying a lot of my files over to the D2-320.Getting everything working was pretty easy.I pulled out each bay, installing the drive was pretty easy, no screws needed. They provide a video on it if you’re unsure. I set the selector on the back of the unit to RAID1, shoved in both drives, connected the USB (drives are powered but won’t spin up until the USB is connected), then held the RESET button with the provided pin until the disk lights flashed. The system found one drive - as it should have.I wrote approximately 18K files and directories of various sizes to the array and then without disconnecting the USB or turning off the power, I pulled out one drive. I then connect the pulled drive directly to another computer to see that the files were in fact written to the drive. They were. All good to go.I replaced the drive. Both lights are green. Since no changes had been made to either drive, this is perfect, it didn’t try to rebuilt the arrayNext, I pulled the second drive out hot. Then connected that drive to the other computer and checked to make sure all files were also written to this drive as well. They were! It is working as it should be.I then created a couple files on the other drive and then replaced the pulled drive back into the D2-320. One drive light was blinking green, the other blinking yellow. According to the online documentation, this means it is rebuilding the RAID1 mirror. Perfect .. Everything is performing as expected. It did take a few hours to rebuild .. but these are 6TB drives, so that was expected.The USB cable provided seems adequate, USB C on both ends. If you need a different cable, consider that when purchasing.Average 1G file write 156 MB/s, average 1G read 221MB/s. Slow but these are mechanical drives connected via USB. Acceptable. Later, I watched a video using Jellyfin and reading, transcoding, and streaming worked perfectly fine.The large fan is quiet and seems to keep the drives cool. Airflow looks to be sufficient. How noisy the unit will be will depend on your drives. Some are louder than others.These drives will be part of a system I have in place which will be up and running 24/7. I’ll be very interested in seeing how well the Terramaster D2-320 performs in the long run. I’ll post updates after I have used them for some time.

This thing is great and does exactly what it's supposed to do. A little bit expensive but worth it for storage outside of the PC.

I purchased 2 of these, one from Walmart and another from Amazon. I've had random issues with this DAS and I can only come to a conclusion that the one from Amazon is defective. I purchased a NVMe WD Blue 4TB and no matter what slot I install it in I get "Port Reset Failed" within windows device manager. When comparing the 2 D8's visually, they are the same except for the front panel LEDs, they are much dimmer on the one from Amazon.The noise level is super low, I cannot hear the fan while turned on. While the case itself does reduce drive noise, it really depends on your drives since the device itself is QUIET. The feet are super squishy to reduce vibration. The cooling is amazing for the SATA drives. The cooling for the NVMe's isn't terrible but could be better. I have 3 NVMe's (WD Blue's) in slot 1, 2, and 3 that are used frequently for Plex and they stay around 30c. Details Below.SATA Slots:- Great cooling lots of forced air to cool your drives.- Possible to mount 2.5 drives, hardware included.- Screwless design for 3.5 drives.- Super easy install.- Powered by external power supply.NVMe Slots:- Cooling is adequate.- Full performance is hindered by the USB interface.- Shouldn't use performance drives for the reasons above.- No front panel LED display to show activity.- Must remove a side panel (2x Phillips) to install/remove drives.- Powered by external power supply.Power:- Off = 0.0 W, 0.0 A- On (No drives) = 4.39 W, 0.08 A- On (1x WD Blue 4TB HDD Copying) = 11.95 W, 0.19 A- On (1x WD Blue 4TB NVMe Copying) = 7.24 W, 0.12 ATemperature: (Note my indoor temperature is a bit on the chilly side)- SATA HDD = 28°C / 82.4°F- NVMe = 30°C / 86°FNoise:- 6 Inches from fan = 27 dBConclusion:I decided to return this Amazon D8 and keep my Walmart D8. I would have loved to keep both; however, its time has come up and instead of troubleshooting past its return date it would be more cost effective to return it. That aside the idea and functionality of this device is amazing. It has the longevity provided by the NVMe drives for heavy accessed files, a simple RAID for crucial files, and more SATA ports for more SPACE.