UCTRONICS19” 1U Rack Mount for Raspberry Pi with SSD Mounting Brackets, Thumbscrews Front Removable Bracket Supports Up to 4 Raspberry Pi 5, 3B/3B+, 4B and 4 SSDs, Option SD Card Adapter

I just installed four Pis in this case. While the case is designed for the Pi 4 B, the Pi 3 B and 2 B fit in it, too and I suspect the four-USB-port Pi 1 B+ will fit into it too. (The original Pi 1 probably fits too, but would have some empty space around the USB ports.)The boards mount securely to little daughter cases using supplied screws (mine came with two more than the sixteen required). On the bottom of each daughter case is room for a 2.5" hard disk or solid state drive, and screws are supplied for this as well. You'd need to supply your own USB 3.0-to-SATA-and-power cable/interface, and you'd need to ensure that your power supply had enough amperage to properly power both the Pi and drive, but this is a nice touch. The four daughter cases connect to the main rack-mountable portion using thumb screws that also have Phillips heads in them, in case you need help loosening them.Running the power cables to the Pis is a bit tricky, so you may want to connect them before you put the whole thing into your rack.The status LEDs of the Pis will be invisible using this case, since they'll be inside the rack, but the Ethernet ports are fully exposed at the front of the case, along with the USB ports. You can, of course, see the network traffic LEDs easily from the front, so have a pretty good idea if your Pis are functioning okay.There is limited space to label anything, but I was able to put some labeling machine labels on the case vertically with machine names, so I know which is which.This is a nice case. It's not super inexpensive, but as rack-mount stuff go, it's reasonably priced, and it's certainly thoughtfully designed. I would buy it again (and may get another yet).

Works great

Nice 1U panel that holds 4 RPIs. My Pi's are mounted safe and secure!The thumb screws are a really nice addition. They're mounted to the frame that slides into the rack and are spring loaded. It's nice to not have to worry about loosing these or them shooting across the floor if you drop one.The fit is tight and right. Everything fits perfectly. I have a Pi4b and two Pi5's loaded in the rack now and it gives them a nice professional fitting where they're safe from being knocked around or dropped.I guess you can fit a hard drive underneath but I couldn't get my seagate to fit - it is a usb portable, so there's a case that increases the height of the drive. a standard internal hdd would probably fit though.One drawback is that the mount standoffs are part of the individual mounting frames for the pi's. If all you're doing is mounting a Pi with nothing that needs extra space it'll work fine. But my Pimoroni ssd card that mounts under the Pi pushed everything out of the way. Tried different mounting configurations but really is meant to be mounted the way the manufacturer wants it to be mounted. In the end I just cut them off and used ordinary standoffs.

I love the idea of this. Unfortunately, there are some things you will need to be prepared for. I will not discourage you from purchasing this unit because in the end I would probably buy it again.1. If you plan to use the official POE HAT for the Raspberry 4 (I have both versions), you will need to purchase your own stand-off screws to mount the device then secure the POE hat in place. You can jury-rig this by using a mix of the screws the seller provides for this unit and the existing spacers that came with the POE HAT. Is it pretty? No. Does it get the job done? Yes. I set this up and have been using it this way for a few weeks now and pretty happy with the results.2. If you use the jury-rigged solution above with a POE hat, FORGET trying to attach a 2.5 HDD drive. Yes, you might be able to find a slim one that fits, but mine is average thickness and its big enough to prevent sliding it in. I'm sure I can dig around and find a SDD or a ultra-thin drive that might fit, but I didn't see anyone else mention this, so there you go.I'm actually going to pick the SD extender so I can swap out the SD cards boot with easier. I couldn't figure out the netboot on this but not too worried about it. But aesthetically and functionally this is much better than just taping the RPI devices to the side of my home server rack, so overall I'm pretty happy with this.

Loved this little pi mount for my mini rack. I put 2 pis in the currently for pi hole and then another for OMV and its working great and looks super clean! Looking to get another Pi in there for some additional stuff but for now clean and effective

Rack is perfect for my needs. On the tray that you install the Raspberry Pi onto, there is a space on the bottom of the tray for a 2.5" SSD. I recommend you stick with a 7mm drive, a 9mm drive will most likely not allow tall Pi Hats from fitting through the opening the tray is screwed into.On the top of the tray, there is a place for a SD extender that UCTRONICS sells. So you will want to install it first if you are planning on using this.You can then install the Raspberry Pi onto the stands of the tray. The Official Raspberry Pi POE+ HAT comes with M2.5x9mm stands. If you want to use this HAT, you will need to purchase M2.5x9mm stands.From another review, you can look for this item in Amazon, "uxcell M2.5x9mm+6mm Male-Female Brass Hex PCB Motherboard Spacer Standoff for FPV Drone Quadcopter, Computer & Circuit Board 20pcs", and it will work perfectly. However, it isn't the only one item, you just have to find it.Once everything is attached to the tray, you can just slide it in with no issue to the rack. There was more then enough room to slide the tray in and out with the Official POE+ HAT attached.However, this is if you use a 7mm SSD. Anything more and there is no guarantee that everything will fit through the opening. So be warned if you are planning on using SSD that is thicker than 7mm.