I have two Raspberry 4s running balenaOS 2.69.1+rev1 + supervisor 12.3.5.
I’ve been having a lot of issues with SD cards in this project, and have switched over to SanDisk Extreme Pro (64gb, 32gb) cards, but the issues persist. Using the official power supply with both devices.
One of the raspberries barely comes online, and produces the green led 4 flashes four times error, with a brand new card. In the past, several other cards eventually produced the same result. I have no access to this device, it’s at a friend’s house, we tried reflashing and it only works for half an hour or so at a time.
I’ve had the other raspberry produce the same result with most cards in the past, and I recently had a corrupted file system with a new SanDisk card after less than a month of use (it was pretty hard to tell, because the logs just flashed on screen for a second or so before the device rebooted). Repairing the filesystem on another device made it work again.
I’ve been writing these issues off as being caused by cheaper SD cards and power sources, but that doesn’t seem to be the case anymore, upgrading those components more or less gives me the same results. What logs can I look at to figure out what’s up? What checks can I run to eliminate hardware issues? What am I dealing with?