(04-28-2018, 06:11 AM)KeithJohnAlger Wrote: If you flash SPI then it should attempt to boot from the EMMC first, but without it flashed it will boot from the SD first IF THE SD IS MARKED AS BOOTABLE. Which is very useful if you want to use it to make an image of your live system from the EMMC.
SPI is so you can boot from a USB device, EMMC always boots first with or without SPI, although the sdcard may sometimes seem to boot first because partition names are used in /etc/fstab.