Ring some bells of a similar issue ( SSD Media error) ~ 2 years ago with one of the Big! SSD vendors
The issue is when you have a failure you need to rebuild the Raid , that usually means more reading from cold area at the remaining SSD, meaning.. increase the probability of hitting another media error causing another failure ... causing more reading..in the most undesired time ...think you got the point :(
So insure you storage vendor have a background task that do health check on your entire media once in a while , its his duty to guarantee your data safety no matter what !
Otherwise you will end up as a nice Tax Office I heard about