Complex sentence: Later drives map out bad sectors automatically, in a way invisible to the user, and the statistics and logs available through S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology) provide information about the remapping.
Split into simpler sentences: Later drives map out bad sectors automatically, in a way invisible to the user. Statistics and logs available through S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology) provide information about the remapping.