> you can't fully boot without a microSD card yet Not true! The Pi supports seve...

jack12 · on July 25, 2019

As your parent says, the Pi 4 doesn't support USB or network booting yet. From your link:

> Support for these additional bootmodes will be added in the future via optional bootloader updates

I believe they need to write (bootloader) drivers for the PCIe host and for the new USB3 chip before USB boot can be supported by the bootloader, while netboot requires a driver for the new gigabit ethernet core.

andymal · on July 25, 2019

You can use micro sd card for the bootloader and boot from USB 3 ssd on rpi4.

https://jamesachambers.com/raspberry-pi-4-usb-boot-config-gu...

inetknght · on July 25, 2019

That's not _quite_ booting _without_ an SD card though ;)

justin66 · on July 25, 2019

> This documentation doesn't cover the Pi 4, but USB/network boot is available there too, cf.

No, they're not. Network booting is a couple of weeks out and USB over a month. It's a topic of discussion on the Pi forums.