RackChoice Internal Hard Drive Enclosure 5x2.5”/3.5” SATA/SAS Hard Drive Backplane 6 Gbps HDD hotswap in 3xExternal 5.25" Bay Compatible with All Rack Types

I bought two of the RackChoice Internal Hard Drive Enclosures on sale for use in a CoolerMaster tower with 6 exposed 5.25 bays. I run an UnRaid server with 10 HDD/SSDs and this is a perfect solution. As other reviewers have noted I had to make minor modifications to the internal bays of the CoolerMaster tower, bending some tabs out of the way to fit the 5-in-3 enclosures but otherwise it was a simple plug-and-play. No instructions needed. The enclosures have 2 Molex power connectors for redundancy, assuming you have two separate independent power rails and you choose to use them in a redundant fashion. Otherwise a single power connection from the PSU to the enclosure works fine. I am powering 5 HDD on a single power rail without issue using a 750W PSU. The HDD sleds require no screws to mount a 3.5 HDD, they just snap-in-place. For 2.5 SSDs screws are required and supplied with enclosure along with 5 SATA cables, but I chose to use my own cables. The sleds latch into place with minimal effort and hold the drives securely in the enclosure. The power and activity lights on each sled work as expected, so you can see at glance what bays have drives installed and when they are active. I did replace the fans in the enclosures with Noctua NF-A8 FLX 80mm fans as mentioned in another review. I have used Noctua fans in other builds and they are excellent and silent fans. It’s not that the stock fans are bad or excessively loud, but for my application and server location I wanted something a bit quieter and lower pitched. I think a lot may depend on your case size/design and the other fans installed in the case as to whether noise is an issue for you. The stock fans run at 2500rpm and in their favor they do keep the 5-in-3 enclosures a few degrees cooler then the Noctua NF-A8 that have set to run 1650rpm which is the middle speed. Even so my drive temperatures range from 29C to 34C under normal use after replacing the stock fans vs. 27C to 33C with the stock fans. Bottomline is that RackChoice Internal Hard Drive Enclosures are a good value and work well if you are looking to clean up you case and have easy access to your drives for replacement. Just to put a final point this: These enclosures are for internal use only. They have no internal controllers and are not a standalone NAS. Read the description carefully before purchasing.

This item has a major flaw: poor ventilation. The fan is incapable of adequately cooling five NAS drives. The fan is weak, and the grille might as well be a cork because it blocks most of what little airflow there is. I was getting drive temp > 40C in a 20C ambient room. I made two modifications. First, I cut the plastic grille out and replaced it with the typical wire fan grille. Second, I replaced the fan with a much stronger fan. It cools the drives adequately now, but it is much louder than it was originally. Drive temps max out around 36C under heavy load, and normally run under 30C. I have the fan on a thermal PWM that will ramp up the fan speed when airflow around the drives reaches 35C, which it hasn't needed to do yet. It'll happen later in summer. If this thing were properly designed, it would have one 120mm fan on PWM so that it could move enough air without the high-speed fan whine. If you put a powerful 80mm fan in it, as I did, the combined noise of the fan and the air whistling through the inadequate square holes in the backplane AND the NAS drives banging around is obnoxiously loud. Now I wish I would have bought a new case instead of this drive rack. Bottom line: I don't recommend this item because it won't properly cool your HDDs unless you modify it, which you shouldn't need to do. If you do modify it, it'll be loud. This thing only makes sense if you really do intend to hot-swap drives, otherwise just put the drives in bays like I should have done. It's a poor choice for a NAS.

I bought this to replace an Icy Dock originally in my Unraid home server. At the time I chose the Icy Dock I opted not to spend the extra money for a "tool-less" design, but have since regretted that choice every time I needed to swap out hard drives, and had to mess with four tiny screws to mount each drive in it's sled. So I decided to switch. The Rack Choice is considerably less expensive than the Icy Dock. Apparently it was deliberate on the part of Rack Choice to opt for lower cost using lighter gauge metal and more plastic. While the Icy Dock has a very solid and precise mechanical construction with a high-end feel, I think the choices made by Rack Choice make sense from a value proposition. The design and materials actually function better than I expected. (The unanswered question is whether it will be reliable long term.) As noted in other reviews, for some reason the spacing between the drive sleds is slightly inconsistent, so the design appears to lack some precision. But that's merely an aesthetic flaw. From a functional aspect it works fine. All four 3.5" HDDs (installed tool-less-ly) and an SSD (installed in the sled with supplied screws) mated seamlessly with the connectors. The insertion and removal is smooth and precise, although not with the extremely solid "feel" of the Icy Dock. I did run into one problem using the tool-less thumbscrews supplied with my case to mount the Rack Choice in the case's drive bay. Those screws proved to be a bit too long and impeded the right-most ("HDD5") sled, so I had to use the shorter Philips head screws supplied by Rack Choice. The performance of the Rack Choice 80mm cooling fan actually surpasses the more expensive Icy Dock's two-speed 80mm fan. The Icy Dock's low speed provided less airflow than I found necessary, while the high speed was far too noisy. The Rack Choice fan provides better overall cooling without excessive noise. It's likely aided by the less restrictive airflow design of it's drive sleds relative to the Icy Dock's. Since Icy Dock has been using SATA power connectors for some time, I thought the use of the Molex power connectors by Rack Choice to be a bit surprising. However Rack Choice uses two of the Molex, simplifying their design compared to the Icy Dock's with three SATA power connectors. I'm guessing that the Molex connectors are rated to handle higher amperage. Icy Dock's three SATA power connectors result in a messier rear panel with power and data connectors scattered all over in various orientations, whereas the Rack Choice connectors are laid out adjacently resulting in a cleaner design with connectors easier to access from inside the server case. On the other hand, the two Molex sockets are tightly adjacent leaving no room for "squeeze-to-release" Molex connectors, so I had to bend the "squeezers" out of the way for my Molex plugs to insert. Overall, while there are various tradeoffs, I am very pleased with the Rack Choice product. I think thoughtful choices where made to achieve a good value / performance ratio.

These were used to build a home NAS system running Unraid, mostly for media usage. These work very nicely, and in a case with six 5.25" bays like the one I used, allowed me to add a total of 10 hot swap bays to the front of the case. I did have a bit of inconvenience installing because the case had little metal tabs inside used to shelve individual 5.25" drives and this item isn't slotted to account for that, so i had to use pliers to break off the tabs from the case. Not a huge deal, but something you should be aware of if your case has these and you don't want to modify the case. Once these were installed into the case, installing the drives into the sleds was super simple. Another reviewer said the screw holes don't line up and they had to drill holes in the sleds (in assuming they meant on the bottom, which only has holes for mounting SSD drives -- HDDs should be mounted to the sleds via the holes on the *SIDES* of the sleds, which line up perfectly, NOT the bottom). Everything works as it should - drive sleds are easy to swap in and out, and there are indicator lights that show which bays have drives in them and per-bay drive activity. One thing to note is that this item takes two Molex connectors for power and does not have the option to use SATA power; this shouldn't be a problem since most power supplies come with Molex power connectors, but is worth mentioning. Something I do kind of wish it had is a lock and key like I've seen on other models, mostly because my NAS is in my living room and I have small kids who could potentially pop drives out with the push of a button. This isn't a big deal but would have been a nice touch. Overall, I'm very pleased with how this project turned out, and this item will make it dead simple for me to swap drives in and out of my NAS without having to move the infamously 600 lb CM HAF case!

Perfect for ZFS pools. First of all, I don't understand the people that are complaining that this enclosure has no instructions. It's LITERALLY plug and play. I use it in combination with a 5-bay external HDDRACK and (1) standard PC power supply - using both will get you (8) drives on your desktop. And it doesn't have to go inside a PC case - works just fine standalone sitting on top of the tower case. The 5-bay HDDRACK uses standard SATA power cable for each drive, and this enclosure uses 2x Molex 4-pin power. Connect everything to a bog-standard -8E LSI 2008 (or better) SAS HBA in IT mode and add a UPS for battery backup and power protection, and Bob's your uncle. This is **PERFECT for ZFS** if you only need up to 8 drives. If you need more than that, add on another PC power supply, another -8E SAS HBA in a 4x PCIe slot (or replace with a -16E 4-port HBA) + one of these enclosures, and another 5-bay HDDRACK and you've got (16) drives running without spending a whole lot of money for a disk shelf. I verified it works fine with both SATA and SAS drives by buying a cheap 4TB used SAS drive and putting it in with a 4TB SATA Seagate Ironwolf NAS drive, they both mirrored fine with ZFS (ashift=12) even though the SAS drive is 512-sector and the SATA is 4k-sector. Didn't even need to use the 5x included SATA cables. I have tested it with up to 10TB Toshiba NAS drives. Not sure what the maximum drive size is for this enclosure but it does work fine with all drives tested so far, I don't know of any reason why it wouldn't take 16TB or 18TB drives. Very happy with it, would buy again and have recommended it to my mates on /r/DataHoarder. PROTIP: I leave the 5th bay open for drive swaps. They do die, and then all you need to do is switch the cable to the 5th port.

To be honest, this is the only real 5 bay hot swap available, that I've been able to find, so it's hard to compare. The following are the issues I had to deal with getting everything up and running. In my opinion Molex 4pin for power is just archaic at this point. If you build a device that supports SATA hard drives why not also build the connector to power them with the SATA15. I'd even rather connect four of the power satas instead of dealing with molex connectors at all. On top of that power supplys are shipping less molex connectors. I get worried enough when I'm plugging in a molex to a molex, but I almost lost it plugging that connector into this unit. Not much you can do to try and hold all the bins straight, and it felt like there was some give...so I was afraid I was going to damage the drive bay while pushing the connector into the back. The punch tabs on the housing, which I'm guessing is so they can save money by only have one housing manufactured and then customize it based on unit. That would be fine if there were instructions to tell you about the unit and they were little hard to punch out. I accidentally pushed the one that has a power symbol on it, because without instructions I was wondering why there was a power button on the back of the bay and ended up popping the punch out into the unit. Which I then had to fish out. No documentation. Aside from it being helpful to know what screws are for what, the main thing is knowning what the molex connections are for. On the back of the unit, next to the molex connections, it's labeled 4PIN1-1 with an arrow pointing in and under that 4PIN1-2 with an arrow pointing out. What the hell am I supposed to make of that? Does that mean I only need to connect one molex to power the unit and the second one is to daisy chain off of the unit, or do I need two molex to power all five drives in the unit? When trying to find an answer about the molex connectors, on amazon, the response from the seller is "To use on will be OK, we design two is for standby" I have no idea what that means. A customer resonpded with "As far as I am aware, you do not have to use both to power the unit. For testing, I only plugged in one and everything seemed to work. I only powered both just for power redundancy purposes." That also doesn't really make sense to me...like what is power redundancy, does this person have seperate power supplies in the case? and What does it mean everything seemed to work? Did the person plug in five drives and have them all accessing data at the same time to see if one power connection held up with five mechanical drives spinning? So I guess this means I just have to test it myself, hopefully not messing up my array in the process. Aside from that, they fit in my 4U case and were easy to get the drives in. I haven't had any of the connection issues other people mentioned, and I like all the lights working to show me what drives are in and active. I'm also not having any fan noise issues that I saw others mention. They aren't any louder than the case fans...if anything they are softer and I haven't even put the case cover on yet. FYI: It only needs 1 Molex to power all five bays, at least in the tests I done so far(which is 5 mechanical drives all being spun on startup). I'll know for sure the next time there is a parity check, so if you don't see this updated within a month it's working with just 1 Molex per 5 Bay Drive. Also, I didn't want to risk 15 bays being powered by a daisy chained Molex so I have them all on their own seperate leads from the PSU.

Nothing but CRC errors, and i purchased 3 of them. DO NOT BUY, had to bypass this all together to get my drives to stop giving me errors.

they are tempermental about insertions(can fail to properly hook the latches in place if inserted carelessly) and can be tricky if your case uses Sheetmetal ledges to hold 5.25" drives(ledges prevent you from shoving the box into the case) but after learning the laches should have you push on the spring bar handles and NOT the sled body and after some slight bending of my case metalwork, this cage is amazingly useful the fan is very quiet and keeps drives inside cooler than the 45-50C they can reach in some choked cases, the quick-connect sleds work pretty well for hot-swapping 3.5" drives(you can use 2.5" if you sacrifice the "tooless" part) it uses molex 4-pin connectors which means it may not play nice with sata m.2 drives in adapter sleds because it would lack 3.3v power, and it is cool because it uses the confusing documented pin on the power connector for signaling drive activity if it was designed with cutout slots for the ledges most cases have between single 5.25" slots and the latch was shaped slightly better to ensure proper insertions it would be 5-star but given sled compatibility I think it should just have the slot cuts, you seldom would have issues with the latch anyway

Works as intended, very satisfied

Arrived quickly and was installed easily into my server all drive bays seem to be operational and cooling fan is not too loud,keeps my drives between 37 and 33 degrees.only thing I would say is that you need to solidly seat the drive tray or it may not see the drive especially ssds.

Pretty nice enclosure! I was able to add 5 more drive to my server for a fraction of the price of a genuine Drive cages!

I love this drive bay! Unfortunately it can't go all the way into my case (the case is quite small, so it hits my ram) but it doesn't look too bad sticking out a bit! I love having access to the drives, hot swsping works great, but the main reason I wanted this is it keeps my drives cool. No overheating anymore. I think my next case will be bigger, and with more 5.25" drive bays so I can get. A second one of these.

Very cheap product, recycled from another product, useless options in the back. Disks are too close together, run hot, fan is insufficient. Overpriced and underperforming!