Issue
I have a Raspberry Pi Compute Module 4 with eMMC, I'm able to flash from my Ubuntu host the eMMC following the instructions using
- rpiboot
- Imager
I have flashed a SD card using the tool Imager, but when I introduce it in the slot, It is not booting from the SD but from the eMMC. I have used a Jumper in J2, to disable eMMC boot, but nothing happens, and if I remove the Jumper the board boot from the eMMC. How can I make it boot from SD?
Thank you for the info.
Solution
I asked this question in the RPi forum: "If I have a CM4 with eMMC plugged into a I/O board, can I put in jumper J2 to disable eMMC boot and boot from a microSD instead?"
Here is the answer I received: "the module with an eMMC doesnt have the SD pins wired up, so the microSD slot on the CM4IO board is going nowhere. you could add your own microSD on the right gpio, but the firmware doesnt support booting from it"
And another answer: "You end up booting to USB mode rather than SD Card - this is a fall back if the eMMC gets corrupted somehow."
Answered By - David Yen