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You still need an SD card in there but all it needs is a bootloader and a config file that allows booting from USB. You can make the /boot partition read only s
by moftz 8y ago
You still need an SD card in there but all it needs is a bootloader and a config file that allows booting from USB. You can make the /boot partition read only so there's no chance of it being screwed up. SD cards do suck but at least they are cheap enough now that you can keep some low capacity ones with bootloaders installed on hand.
- noonespecial 8y agoNo longer true. I've got several 3s as NAS's running exclusively off their USB drives.
- Florin_Andrei 8y ago> You still need an SD card in there Not true anymore.
- wolrah 8y agoPi 2 requires a permanent SD card as its built-in bootloader does not support network booting. It does not support USB booting. Pi 3 B has support for both USB and network booting in its bootloader, but they are disabled by default. They are turned on by modifying some OTP configuration bits, which is a permanent change. Once set the SD card is no longer required. Pi 3 B+ has network and USB booting enabled by default. Presumably Pi 3 A+ will support USB booting out of the box, who knows it it'll also support USB ethernet adapters for PXE.