Hard Drive RAID Enclosure Dual Bay for 2.5 Inch SATA SSD HDD, USB 3.0 6Gbps with UASP, RAID 0/1/JBOD/PM, 16TB Capacity, External Hard Drive Case Reader Aluminum

I don't have a need for another RAID unit per-se. But I've accumulated lots of laptop hard drives over the years. Seemed wasteful to just toss them. So what do I do with them? I use this unit in large drive mode, and use old drives as scratch space. Like temporary quick storage for media files on the go. Large mode means that you get 1 big drive. 1TB + 250GB drives get you a virtual 1.25TB drive with this unit. I just run the drives until one of them finally dies. Figure out which one is bad, get rid of it, reset, reformat and keep going. It just works. And I feel like I'm not wasting old hardware.

Raid is something I MUST have and this case does exactly what I need it to do. It's been in play for a couple months now and I use Veeam Agent to backup daily. I actually tested the mirror raid by removing one drive and it worked seamlessly. The all metal casing is sturdy and well made. For this price I think I got a fantastic product.

I was hoping to build a work device that was faster than a RAID-0 external hard disk pair. I wanted to set up two SSDs in RAID-0 configuration. I was surprised that it isn't faster than other modes at all. You can see that the listing looking at drive speed tests. I ultimately decided to use "Normal" mode, which is even faster than RAID-0 for reading and writing. Pros: Good price Small size Beautiful case Cons: RAID-0 is a joke speedwise Secondary power cable? I'm running SSDs and tried running from the power from the data cable and that seems to work just fine. So far, I think it's quite a bargain even though the RAID-0 just barely works.

This is a review of the K25272, not the K25272C (which I have on order). The K25272 has a jmicron chipset which is just absolutely terrible. Even Amazon's Rufus agrees and basically told me to return the enclosure because all the issues I described line up exactly with the jmicron chipset issues. 1. The jmicron chipset's uasp support is absolutely terrible and has to be disabled 2. the chipset overheats and freezes up when you do any relatively heavier test. 3. the chipset reported all my 2.5" hdd's to have badblocks, but which when I re-ran a full badblocks test in a ugreen single enclosure actually report fine! Even Rufus says this is known with the jmicron chipset, and that the K25272C has the more reliable Asmedia chipset, so I have ordered that, hoping it will be the solution I'm looking for. Update: I received the K25272C, and it confirms as having the asmedia chipset. I'm running badblocks test now on my verified healthy hdd's to see if this enclosure will be reliable. Update: After some initial errors, the K25272C has stabilized, no errors with badblocks running for 2-3 days. Active cooling helped. Blowing a fan directly dropped hdd temps by a lot and stabilized it.

Have two of these units I use on my server (small brick n100 with Ubuntu server). One has 2x 2TB ssds as separate mounts and the other is a 256gb mirror for important stuff. Price was good and they serve their purpose. Might not be the fastest but your not paying top dollar either.

<update> I've forgotten that these DYI enclosures have lead to tears. I was looking forward to happily using my 4tb drives and forgot the bad of the past. The faster drives with the enclosure had my Mac warning me "Disk Not Ejected Properly" see attached. It ejected itself, and seemed to corrupt the contents, both in "Large" and "Normal" modes. It seemed intent on going to sleep would be my guess. No dashboard, so I'm not sure. Returned. I've ordered an assembled WD 2GB drive and will be using it. Cost the same as these 2 enclosures. </update> Sadly Drobo Inc (or their parent company) has failed me the dashboard hasn't been updated for MacOS Ventura, so I'm moving on, Beyond RAID or Beyond DROBO (hehe). I'm not sure if I need a RAID. I'm moving my User Folder off of the internal drive on one of these units using the 4X1TB drives from the Drobo. in Large mode. And will have 4TB on 2 drives for backups. I have an existing drive. Playing around with the switch settings last night left me with nothing that would mount, the instructions are hard to read and unusable. I went to bed. This morning they both work (after resetting them). RAID 0 doesn't seem to work for me (see screenshots Raid 0 on the left) perhaps I need to buy faster drives. Opened box, nice presentation tray with enclosure wrapped in plastic. Remove plastic and "Sled" falls out of "Tube". Lift plastic tray and there's a lot of stuff, 4 screws (2 long, 2 short), UBS 3 cable (Data) USB 2 cable (data), and 2 screwdrivers. Bagged nicely. Popped drives in "Sled" plugged used long screws to stabilize drives (1 each), into Mac received "disk unreadable" error (good), put "Sled" in "Tube", put screws in, plugged in and formatted. Good: Inexpensive and fits what I want. Solid box when installed, easy assembly. Metal on outside. Bad: "Sled" is plastic, DIP switches seem fragile, be careful. Not quite sure how to reset drives, but I have them in Large Mode, which is what I wanted. LEDs flicker when you eject the disk, but stay on after, so you're not sure if they are unmounted. No feet on drive. I'll add some. LEDs don't tell you drive is sleeping. Bad documentation. YMMV: LEDs are not too bright, but can't seem them on the shelf under my desk(where they will live, vertical). When not sleeping , they run warm. Don't know if my user folder will allow it to sleep. Satisfied.

I can only assume the previous reviewers are the type if people that buy something and are happy if it works. Does this "work?" Yes. But it does not work well. It does not transfer anywhere close to as it should, and I have to say this is garbage tier hardware. I was planning on installing my Steam library on 2x4 samsung 4tb SSDs, but it cant even seem to make it through one game install without clapping out and needing to be unplugged and plugged back in. The sustained data transfer is such that the device really isn't an upgrade from my existing WD Red 14tb in an external case

Buenísimo

Includes screws and a few appropriate screwdrivers to install the SSDs. In 'normal' mode it appears as two disks. Under linux I partitioned them, assembled a raid mirror , formatted them then mounted them. Just a few minutes. JMicron JMS551 bridge in the box.

Easy to install & setup using the dip switches - make sure to turn the enclosure off/on after setting the switches to make sure the change takes effect. I installed 2 X 1tb hard drives in RAID 1. The only thing I noticed is that it gets quite hot as there is no active cooling.

This unit works well in my QNAP NAS. My NAS was giving write errors on the cheap NVMe disks so I replaced them with newer ones and use these as a backup in this enclosure. So Far, so good.

It was hard to find this, it is exactly what have looked for. Just enough size to keep two 2.5" SSD and capable of RAID 0, 1.

Bought two to expand my old hard drives, very easy to config and high performance.