We are a company that builds products using Rock Pi computers.
On our current project, we use Rock Pi 3A (version 1.31) running Debian 11 (a.k.a https://github.com/radxa-build/rock-3a) from an SD Card.
What I want to achieve is to create a read-only OS filesystem, so that the client can safetly unplug the power of our product without requiring an OS shutdown.
An overlayfs (that acts like a read-only fs) would be the best option, but I could also work with reducing the writes on the SD Card.
I don’t know where to begin on installing an overlayfs.
Also, a simple task like disabling creating new tmpfs partitions does not work by editing the fstab file.