Yottamaster 2 Bay RAID Hard Drive Enclosure, Aluminum USB3.0 RAID Enclosure for 3.5 & 2.5 Inch SATA HDD/SSD, Support 32TB(2x16TB) Direct Attached Storage DAS RAID1/JBOD/Normal [PS200RU3]

I needed an enclosure which was fast, natively supported RAID, and well-built. After a bit of research, I settled on this device. Out of the box, the device is solid: nicely machined case with easy-to-install drive sleds; it feels high quality. At this point, I had a bit of a problem -- after setting up the device, I noticed it wasn't powering on. My first hunch was that it was the power supply, but I was able to test and verify the power supply was functional. I reached out to Yottamaster's support via their website, however, and they very quickly were able to send me a replacement. I was surprised and impressed by how quickly they were able to resolve the issue! Once I had the replacement in hand, I was able to quickly set it up in RAID 0 and complete my backup. Very good transfer speed via USB3.0 between my NAS and the enclosure, and there were no observable bottlenecks.

Product is okay and works as it should. My only complaint is that there is no mechanical damping so if you use mechanical drives there’ll be quite a bit of vibration and noise, which can be quite annoying and sounds like a WW2 bomber. The easy fix is to rotate the enclosure 90 degrees so that the drives are vertical and I also put in some heavy rubber feet on the bottom. The noise is now mostly gone.Update:I’ve finally located the source of the interference that’s been puzzling me for some time. It was the enclosure itself! Once in a while my wireless keyboard and mouse would get a very sluggish response or no response at all. As soon as I unplugged my drives/enclosure the interference went away!Update after just over one year:I added a lot of files to my computer last night, and then I backed them up (around 600 GB) to my HDD drives in this enclosure (set up as RAID1). The backup went smoothly and I verified that the files were correctly backed up. But today the drives in this enclosure suddenly disappeared and were no longer detectable. This is so scary. Fortunately when I pulled them out of the enclosure and used an adpator to read them, my data were intact, and the drives had no issues. It is just the enclosure that had died. I do not recommend this enclosure if you have any data that you cannot afford losing, especially considering that the enclosure is not exactly dirt cheap.

Great enclosure, you can use 2.5 and 3.5 HDD in it. It's built well and its not too heavy. I'll most likely purchase another one in the future(or the 4-bay RGB fan model by Yottamaster). I believe the capacity is 32TB(total). The price is good as well for an aluminum 2-bay enclosure($79.99 is what I paid).

I had two internal drives (SATA) that I needed to use with a new computer that has no room for internal drives. I wanted to keep the drives as close as possible because they were reasonably fast (I thought), with about 40 MB/s read and 35 MB/s write. (This was somewhat faster than my external drive.) When I got the enclosure, I pulled the drives out of my old system and snapped them into this new one. Including reading the instruction, laying out the parts, and putting it all together, this took about six minutes. I plugged it into my computer and attached the power, and it worked perfectly first time -- and my read and write speeds are close to 110 MB/s, over 2.5x as fast as they used to be as internal drives. (My internal SSD is 20-30x this fast, and my external SSD is 7x as fast, but these HDDs are still a lot faster than I expected, showing that the enclosure is set up to handle very fast data connections.) My only negative is that the instructions said that the enclosure included an LED for each drive to show its activity, and I have not seen these LEDs.

This review is for the two drive caddy that does not include a fan. I was trying to keep the noise level down so I wanted a fanless option. But, this caddy runs very hot and will cook the drives and make them fail. It has no airflow at all with very small holes at both ends and none on top or bottom for thermal transfer. Instead, I used a Wavlink caddy which is physically not as nice but the drives are exposed and can air cool without a fan. This unit would have been fine if there were holes drilled in the case for air circulation; and I could have done that if I had the patience to drill and deburr about 300 holes. I don't.

I'm using the system in RAID 1 with 12 Gb disks for a month more or less. So far, the system works very nice. The only drawback is the temperature. At a given moment I had to install a home fan close to the case, but it was during very warm days. If it is used in A/C conditions will perform better. An extra fan attached to the unit is advisable.

I lost power once and both drives in this device became corrupted and I needed a significant amount of effort to recover my data. I gave it a pass because it was an actual power outage but now it's happened again and I didn't have a single power outage all day. Both drives in the device now read as needing to be formatted and I'm having trouble just restoring the partitions. This thing is going in the garbage.

Heavy-duty built and dissipated heat from 2 hard drives I installed to help HD cool down better than other products I've used. It is also wide enough to set it up sideway without worrying about tipping over.I only wish this unit has some indicator light on the front to show if power is on and when hard drives are in working motion.