8 New Compute Module 4 boards for Spring 2022

It's been a busy start to the year on my Raspberry Pi PCIe Devices website. Not only have we finally made some significant progress learning about the BCM2711's PCIe bus (both good and bad), I've also added a few dozen new Raspberry Pi CM4-based boards to the site.

In my YouTube video today, I go through four of them in depth, showing how they're built and what they're used for.

The four projects I cover in depth are:

  1. Bigtreetech's Raspberry Pad 5
  2. Seeed Studio's reTerminal
  3. Waveshare's Dual Ethernet 5G/4G base board
  4. Ab-log's RPi4-RTC-PoE DIN rail computer

And there are some other projects I'm watching closely as they journey down the road towards production:

How I rip DVDs and Blu-Rays into my Mac (2022 Edition)

It's been more than a decade since I wrote Ripping Movies from Blu-Ray, HD-DVD and DVD, Getting them onto Apple TV, iPad, iPhone, etc.. Heck, back then I didn't write everything as a 'blog post'—that was labeled as an 'article' :P

In a surprising twist of fate, we went from a somewhat more centralized online media situation back then (basically, Netflix) to a hellscape of dozens of streaming services today. And in many cases, older movies can only be found as used and/or pirated DVDs on eBay!

Thus, I'm writing a fresh guide to how I rip DVDs and Blu-Ray discs into my Mac, then transcode them with Handbrake. Heck, some people who are deeper into the r/datahoarder rabbit hole even have dedicated transcoding servers so they can generate optimal archival copies in 4K, 1080p, etc. akin to how YouTube and other online platforms set up their files!

But for me, the basic process goes:

How to run glmark2-drm to benchmark an external GPU on a Raspberry Pi

Recently I wanted to see whether I could get glmark2 (an OpenGL 2.0 and ES 2.0 benchmark tool) to run on a Raspberry Pi with an external graphics card (see this thread).

But glmark2 isn't available in any Pi repositories, so you have to build it from source:

sudo apt install -y meson libjpeg-dev libdrm-dev libgbm-dev libudev-dev
git clone
cd glmark2
meson setup build -Dflavors=drm-gl,drm-glesv2
ninja -C build
sudo ninja -C build install

I built this for drm only, so it can run fullscreen without any X/Wayland environment. To run the full suite:


Or you can run a specific benchmark like glmark2-drm -b jellyfish.

Using a reverse-NFS mount to access Docker container's data from macOS

For years, Mac users have dealt with slow filesystem performance for Docker volumes when using Docker for Mac. This is because the virtualized filesystem, which used osxfs for a while and will soon be upgraded to use VirtioFS.

But if you need to do large operations on huge codebases inside a shared directory, even using NFS to share from the Mac into Docker is a lot slower than running a native Docker volume or just using files inside the container's own filesystem.

macOS Disk Utility APFS Case Insensitive filesystem

2.5 Gigabit homelab upgrade - with a PoE+ WiFi 6 AP

For the past year, I've slowly upgraded parts of my network to 10 Gigabit. But 10 Gigabit switches, NICs, and even cabling is a bit more expensive and sometimes annoying to deal with than the very-cheap 1 Gbps equipment most homelabbers are used to.

I dipped my toes into the 2.5 Gbps waters once I got a NAS with 2.5G ports—you can use standard USB NICs that cost less than $50, or PCIe cards for even less. And cabling is easier, since 2.5G works fine over Cat5e (which I already have run to most of my house).

So in order to install a new WiFi 6 Access Point upstairs—and get it's full bandwidth—I upgraded my main 1 Gbps PoE+ switch to a 2.5 Gbps PoE+ switch.

Looking around at options, most switches with more than 4 2.5 Gbps ports with PoE+ seem to cost upwards of $300. And knowing that I'd like to expand my network a bit in the future, I finally splurged a bit and bought this 20-port monstrosity: