To get an idea of how the disk access affects the performance of a real-world application I'm familiar with and am able to benchmark thoroughly with highly accurate resultsI also ran a set of Drupal benchmarks, using the Pi Dramble Drupal benchmarks I've been running on Pis for years. This makes a difference in many activities, like launching apps, running a web browser with many tabs. And for random access, random reads are a bit faster, but writes are about 6x faster! I had the Pi running in a case with a fan and the Pi did not throttle at any time. I ran them on a clean brand new just-flashed system. Before you ask: yes, I ran these benchmarks four times discarding the first result. If you want to run this benchmark on your own it's documented in the Pi Dramble Wiki's disk access benchmark page. That's okay it seems related to the bug Bootloader can't boot via USB-HDD after system rebootand the solution for now is to unplug the Pi to power it down completely, then plug it back in.īoth are important, but in many ways, differences in the latter are amplified when using a general purpose computer like the Pi, because computers don't just read and write large files all day lots of sequential access like video cameras or drones do that's the use case for which most microSD cards are optimized. Power up the Pi, and after a minute or so it has to expand the USB drive to fill the volume and then rebootit should boot up! Make sure you plug the drive into a USB 3. Shut down the Pi if it's currently running from the microSD card.
Before you eject the boot volume, you need to replace some files on it with the latest versions from GitHub. I cannot be held responsible for anything that happens with your Pi if you try using this beta feature! First things first, it's a good idea to plug your drive into the Pi while it's booted and make sure the Pi recognizes it it should appear on your desktop, or you can also look for it with lsusb.Īnd yes, those are affiliate links. To flash the card, I still rely on good old dd on my Mac, but you can use the Raspberry Pi Imager instead. In the future, you'll be able to download it from the regular Pi OS download pagebut for now it's available from this forum thread. I'll be posting a video and blog post with more detail on that experience very soon. And after testing it a bit, I decided to use the Pi 4 as my full-time workstation for a day, to see whether it can cope and where it falls short. So when the USB boot beta was announced, I wanted to put it through its paces. And on older Pis, with the maximum external disk speed limited especially by the USB 2. All you need to do now is run sudo apt-get dist-upgrade -ythen reboot, then your firmware should be up to date.
September Update : USB boot is out of beta! Check out this video for simplified instructions.
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