4U Server Chassis Rackmount Case | 12 Hot Swap 3.5", 2.5" SATA I, SATA II, SATA III SAS | E-ATX Compatible | 3 Front 120mm Fans, 2 Rear 80mm Fans | 2x USB 3.0 |

This Rosewill 4U server chassis is considered by many to be one of the best "economy" chassis out there. I'd beg to differ that this is one of the top chassis out there. Although you lose 3 drive bays by paying a bit more than some of the other Rosewill offerings, the hot swap bays are a tremendous value and you would be hard pressed to 3d print and/or DIY all of the parts necessary to recreate this setup. I did run into an issue with some missing screws on the chassis handle at the front but fortunately Rosewill includes a significant supply of spares inside the chassis. The chassis itself comes in a double-packed box with tons of styrofoam to keep the chassis safe from scratches and dents. Assembly was incredibly straight-forward with a ton of room for the ATX motherboard, memory, graphics (, and very large heat sink (Thermalright Phantom Spirit 120 SE for size reference) that I was repurposing into a TrueNAS server. I did have to remove the large graphic card support bar spanning the top of the chassis. One mistake I made initially was to repurpose several modular power cables from the power supplies I've purchased over the years. I could have killled my motherboard as one of the manufacturers had reversed the polarity on their plugs and I could not POST. Once I confirmed I was using modular power cables from my actual power supply it was all good. The hot swap function works as intended and I was easily able add drives to my storage pools without rebooting. TrueNAS showed temperatures really low so airflow and fan directions work great. My one minor gripe is the use of Molex power receptacles on the drive bays. These connectors really have not been part of the SATA drive world for some time and I was surprised to see them. I had to buy SATA to Molex adapters in order to appropriately distribute the load across the power supply modular connectors/rails. One other tip is that if you have a home lab setup or smaller rack at home there are rack extenders that you can purchase to either extend the rack out front of the rack or to support the back. I opted for the former as I have a swinging wall-mount rack that would not be able to close had I done the latter. 5/5 stars for being an incredible value but functions like a very $$$ server chassis.

My Rosewill 4U chassis arrived with shipping damage to the drive cage and side panel. I contacted support, provided photos, and they offered a free return. Since the damage was repairable with basic tools, I asked about partial compensation instead. They offered 20% refund, which I accepted. I was able to straighten the brackets and fix the dent myself, and now the chassis works perfectly. Rosewill handled this professionally, and the chassis itself is solid once repaired. Recommendation: If you're handy and get a damaged unit, they're reasonable about compensation. Their cases are great for homelab builds.

I already bought 4 cases from Rosewill. I bought in past the R4000u, L4500, Z2700 and the L4412. Rosewill made great product. The RSV-R4200 is great. I got enough room for an ATX motherboard and multiple HDD.

Rosewill RSV-R4000U Pros: Front cover is a premium painted metal with a soft finish, metal chassis is well built and doesn't feel flimsy, and tons of space. Cons: HDD caddies are a smidge tough to slide onto the drives, and into the chassis, so just be patient, use a bit of a strong hand, and also make sure you align the rails properly. Otherwise, I love the case and its a fantastic price! Includes: a TON of screws (no m.2 screw) for everything you'd need with the case including mounting clips. Not included: Rails <sad

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