There are several reasons why you may encounter WAITING FOR BOOT, and it is recommended that you troubleshoot them:
- Check if you have entered the forced recovery mode.
- Check whether the cable you connect to the linux host is a data cable.
- check if there is a micro SD card slot on your module; if there is, it is not compatible with the carrier board.
- cross-test with other ssd to see if there is a possibility that the ssd is not installed properly, resulting in failure to boot.