I had successfully installed Armbian_2022.08.8_Bananapi_bullseye_CLI_5.15.74 on my M1 and copied the system to an SSD which I had attached to the SATA port.
Then I had updated the UUID in armbianEnv.txt and running the system from SSD was working fine.
The system was running headless in my closet for about 2 months, and I even had no problems to remotely restart the device until today, when it did not come back up after a reboot.
I took it from the closed and hooked it to a monitor just to see the following error messages:
** Bad device specification mmc 0 **
Couldn't find partition mmc 0
I suspected a broken SD card but a check on my Ubuntu desktop showed no errors on the cards file system.
Then I prepared 2 other SD cards, one with Armbian_2022.08.8 as above and the other with Armbian_2023.02.2_Bananapi_bullseye_5.15.93_minimal.
Both did show the same problem, though.
To me, it looks like a hardware problem with the SD card slot.
Is there a way to get the M1 back to work again?