The Wiretrustee SATA Pi Board is a true SATA NAS

In my earlier posts about building a custom Raspberry Pi SATA NAS, and supercharging it with 2.5G networking and OMV, I noted that my builds were experimental only—they were a mess of cables and parts, with a hilariously-oversized 700W PC power supply.

I lamented the fact there was no simple "SATA backplane on a board" for the Raspberry Pi Compute Module 4. But no longer.

Wiretrustee SATA Board for Raspberry Pi OMV NAS

Wiretrustee's SATA Board integrates a SATA controller and data and power for up to four SATA drives with a Raspberry Pi Compute Module 4.

And their entire solution makes for a great little Raspberry Pi-based NAS, using software like OpenMediaVault.

Wiretrustee SATA 2.5 inch and 3.5 inch drive NAS enclosures

You can get a 2.5" or 3.5" kit—in the video below I set up the 3.5" version—and you plug in four SSDs or Hard Drives, and (for now) recompile the Pi OS kernel to include AHCI support, then you have one of the most compact and convenient NAS builds available.

I haven't done formal benchmarks on this setup, but could easily saturate a gigabit network connection with over 115 MB/sec reads and writes depending on the disk speed and workload. The Pi is well-suited to the task, and the internal PCI x1 Gen 2.0 lane can handle internal throughput of around 400 MiB/sec.

Marvell SATA chip on Raspberry Pi Compute Module 4 SATA NAS Wiretrustee board

Check out the video above for more details about the hardware and their custom case, and also check out my database of CM4-based boards and projects for more inspiration—there are some other great new products I'm seeing like these two Pi blade servers, and two unique Pi 3D Printer control boards!


The day I finished editing the video for the Wiretrustee SATA, the folks behind the board announced they were postponing production because of the component shortage—some parts, most notably the SATA controller chip, had increased in price dramatically, and would only be available in small quantities.

You can still sign up for updates on the Wiretrustee SATA Board's Crowd Supply page, and I'm still hopeful this product ships, since it's the simplest and most compact SATA NAS board I've seen for the Pi.

Hey Jeff - I always enjoy your posts, but isn’t the Pi woefully underpowered to be a nas? It doesn’t do sata natively, but over usb (high latency). The usb ports it has it shares a bus with ethernet. Also, pcie 2 at 400 MiB is best case scenario spec. Sharing that bus with ethernet and more than 1 spinning rust disk seems like a bottleneck.

Look again—this particular NAS uses SATA directly over the Compute Module 4's PCI Express bus.

So it's native SATA, and allows for RAID and applications like Open Media Vault to make use of software RAID volumes. It's definitely not going to compete against SMB-focused NASes, but it will saturate a 1 Gbps network link pretty well and could be a great starter NAS or secondary replica NAS too.

I am able to easily get 400 MiB/sec sustained through the Pi Compute Module 4 in this scenario, though the biggest constraint on the NAS side is the 1 Gbps network port.

Finally, on the Compute Module 4 (and the Pi 4 model B even), the network NIC chip is actually separate from USB entirely, so there's no real performance hit using both at the same time.

Wish they could incorporate the power brick or small supply. Cabling always turns into a mess. The DIY enclosure is interesting, could make a larger version with supply and POE switch, just plug in other SBCs to access power, network & data.

I will never take the risk to save critical data on a similar system.
Maybe you can call it NAS but in reality is just a nice proof of concept

Hi Jeff,

I've been looking at some other non-Raspberry Pi based boards for NAS use, mainly because Pi doesn't support AES in hardware like most of its competitors do, making cryptsetup/luks disk encryption painful. I consider that a must for a NAS, because sooner or later you'll end up with some private data on it by accident. But I just learned about Adiantum today, which is a block cipher project using encryption algorithms similar to wireguard and backed by Google for use in low end phone hardware.

Now, I'm really curious about how it compares in performance. Could an encrypted Pi NAS saturate 1 Gbps? Can it saturate that much if being used as a btrfs raid1 (encrypt/decrypt twice for two devices, and then checksum data on fs level).

The overhead for the CPU encryption would likely cause a significant impact in copy speeds over the network, even for 1 Gbps... though it's something I should test out at some point (I haven't yet on any of the Pi NAS solutions I've tested).