I've had a couple eMMC go bad on single board computers. I initially only noticed the off-by-1 read errors when the radio data that was being recorded by the co

I've had a couple eMMC go bad on single board computers. I initially only noticed the off-by-1 read errors when the radio data that was being recorded by the computers (8kB/s for 2+ years) as comma separated values started sometimes getting commas turned into the next character up in ascii which broke my visualization python script. It's definitely something you learn the first time you use eMMC (or any low end storage tech).