Looks like a good idea to me, the question is how small the area would be. I think I've read somewhere that writing that data takes some 40 seconds on some Samsung given the write speeds around 400 MB/s which is approx 16 GB reserved for the feature of user being able to read the failed drive which notified the user long before that the declared number of counts was already spent. Somebody who actually has better (industry insider) info is welcome to correct me.