Addded a 60 GB msata SSD (DOgfish Shark) via Geekworms X850 mSATA expansion board yesterday then cloned my SD card to the drive using RPI-Clone. (Have also added their X735 power management/cooling board and popped it all in one of their metal cases)
Rebooted the Pi(with the SD card still in) and then confirmed that I was indeed now using the SSD rather than the SD card .
When booting from SD power light is red, green light flashes then goes out device boots and runs from SSD (blue light disk activity flashing)
When SD card removed and Pi booted power light is red, green light doesn’t flash and blue light stays solid
NB understand that running RPI-Clone with the -l option means it does the initial boot from the card mounts the USB drive then leaves the SD card unmounted .
the RPI is definitely USB boot enabled
pi@Heimdall:~ $ vcgencmd otp_dump | grep 17: 17:3020000a
Confirmation using SSD
pi@Heimdall:~ $ sudo lsblk -o UUID,NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL,MODEL UUID NAME FSTYPE SIZE MOUNTPOINT LABEL MODEL sda 59.6G DOGFISH_SSD_64GB ABFB-279B ├─sda1 vfat 256M /boot a583607f-97c9-4e91-9447-2882c7e85b1f └─sda2 ext4 59.4G / mmcblk0 14.9G F661-303B ├─mmcblk0p1 vfat 256M boot 8d008fde-f12a-47f7-8519-197ea707d3d4 └─mmcblk0p2 ext4 14.6G rootfs pi@Heimdall:~ $ sudo df -h Filesystem Size Used Avail Use% Mounted on /dev/root 59G 3.3G 52G 6% / devtmpfs 459M 0 459M 0% /dev tmpfs 464M 4.7M 459M 2% /dev/shm tmpfs 464M 14M 450M 3% /run tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 464M 0 464M 0% /sys/fs/cgroup /dev/sda1 253M 40M 213M 16% /boot tmpfs 93M 4.0K 93M 1% /run/user/112 tmpfs 93M 0 93M 0% /run/user/999 tmpfs 93M 0 93M 0% /run/user/1000