Raspberry Pi Foundation is almost ready to deliver a fix for Raspberry Pi 4's lack of support for USB mass storage boot.

USB boot has been possible since the Raspberry Pi 2 Model B (v1.2), but it has only become really worthwhile with the Pi 4. Here is some information, tips, tricks and opinions explaining why and how.

Raspberry Pi 4 has a boot eeprom on-board which starts up the Pi when you first apply power – before Raspberry Pi OS is fired up – it is the thing that starts the OS.

Earlier this month the official Raspberry Pi Foundation development team asked for help testing the new Network Install feature supported by a Raspberry Pi 4, or Raspberry Pi 400.