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Description
CRU RAX840-XJ DAS Hard Drive ArrayCRU RAX840 XJ DAS Hard Drive Array The CRU RAX840 XJ 8 Bay DAS Hard Drive Array is a high density, 4U rackmount JBOD designed to deliver dependable storage for demanding environments. Featuring eight 3. 5" SATA drive bays, a 6 Gb s performance profile, and a Multilane SFF 8088 interface, this DAS enclosure is built to scale with your data needs. Its TrayFree bays make drive installation effortlessopen the front door, slide in the drive, and close the
CRU RAX840-XJ DAS Hard Drive Array
The CRU RAX840-XJ 8-Bay DAS Hard Drive Array is a high-density, 4U rackmount JBOD designed to deliver dependable storage for demanding environments. Featuring eight 3.5" SATA drive bays, a 6 Gb/s performance profile, and a Multilane SFF-8088 interface, this DAS enclosure is built to scale with your data needs. Its TrayFree bays make drive installation effortless—open the front door, slide in the drive, and close the door. No screws, no trays, just a streamlined path to expanded storage that minimizes downtime and accelerates workflow. Perfect for media editing suites, data centers, and enterprise workloads, the RAX840-XJ blends rugged reliability with flexible accessibility to keep up with growth and performance requirements.
- TrayFree drive bays: open the front door, slide in the drive, and close the door—no screws or tool trays needed for rapid expansion or replacement.
- High-density 8-bay design: a 4U rackmount enclosure that consolidates eight 3.5" SATA drives in a compact, serviceable chassis for optimized data center floor space.
- 6 Gb/s performance: delivers robust data transfer rates to handle demanding workloads, ensuring responsive access to large datasets and media libraries.
- Multilane SFF-8088 interface: supports fast, scalable connections via Mini-SAS links, enabling efficient offloads and streamlined host connectivity.
- Front-accessible form factor: simplifies maintenance, drive replacement, and cable management, reducing downtime during upgrades or servicing.
Technical Details of CRU RAX840-XJ DAS Hard Drive Array
- Model: CRU RAX840-XJ DAS Hard Drive Array
- Type: 8-Bay JBOD / DAS enclosure
- Form factor: 4U rackmount enclosure
- Drive bays: 8 x 3.5" SATA hard drives
- Interface: Multilane SFF-8088 (Mini-SAS)
- Data bandwidth: 6 Gb/s performance
- TrayFree bays: Yes, enabling tool-free drive installation
- Front access: Front-door design for easy drive insertion and maintenance
- Rack compatibility: 19-inch rack standard for straightforward integration
How to Install CRU RAX840-XJ DAS Hard Drive Array
- Prepare your server room or data center rack by ensuring adequate clearance, cooling, and power capacity for the 4U enclosure.
- Mount the CRU RAX840-XJ into a standard 19-inch rack using appropriate mounting rails or brackets, securing it firmly to prevent movement during operation.
- Connect the host system to the DAS array with the Multilane SFF-8088 (Mini-SAS) data cables. Verify the cables are fully seated and routed to minimize strain during operation.
- Power up the enclosure and verify that the status indicators indicate a healthy start. If necessary, configure any RAID- or JBOD-related settings through the hosting controller or management interface.
- Open the front door, insert your eight 3.5" SATA drives one by one into the TrayFree bays, and close the door after each drive is seated. Initialize and format the drives within your operating system or storage management software as required for your workloads.
Frequently asked questions
- What is the CRU RAX840-XJ? It is an 8-bay DAS hard drive array housed in a 4U rackmount enclosure, designed to provide scalable, high-density storage with TrayFree drive bays and a Multilane SFF-8088 interface.
- How many drives does it support? Eight 3.5-inch SATA drives can be installed in the eight TrayFree bays, enabling substantial storage capacity in a compact footprint.
- What kind of interface does it use? It uses a Multilane SFF-8088 interface (Mini-SAS) for high-bandwidth, scalable connections to host controllers or storage networks.
- Is installation tool-free? Yes—the TrayFree bays provide a screwless, tray-free method for inserting drives, simplifying upgrades and replacements.
- What environments is the RAX840-XJ suited for? The enclosure is well-suited for data centers, post-production facilities, and enterprise storage environments that require high-density, accessible storage with straightforward scalability.
Shipping Notes
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Exchange/Return Notes
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4.8 ★★★★★
Based on 413 reviews
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Product Reviews
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well.
Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely.
One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs.
The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers.
Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster.
Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality.
Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option.
There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk.
Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine.
The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two).
In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
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Reviewed in the United States on May 18, 2026
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Nice divider, serves it's purpose well!
Size: 3 Panel 12FT W
This room divider worked out very well for what I needed. I wanted a simple way to create a little more privacy and separation in a larger room without doing anything permanent, and this divider was an easy solution. The panels provide good coverage, and the black color gives it a clean, modern appearance that blends in nicely with different décor styles.
Assembly was fairly straightforward, and once set up, the wider feet helped keep the divider stable on the floor. I was especially happy with how flexible the panels are to arrange. You can keep it mostly straight, angle it around furniture, or create a more enclosed private space depending on the layout you need.
The material allows light to filter through slightly while still offering a noticeable sense of privacy. I’ve used it for separating a workspace area, but it would also work well in bedrooms, apartments, dorms, studios, or shared living spaces. Another plus is that it can be folded and moved without too much effort when you want to change the setup.
Overall, this divider delivers a good balance of functionality, portability, and appearance. It’s a practical option for anyone needing temporary room separation without installing permanent walls or curtains.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
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