I would like to see some fairly basic documentation explaining what the (possibly more advanced) tabs are all about. For instance, in the HEALTH tab, what exactly are the entries in the table trying to tell us? Some of it is counter-intuitive, e.g. my Seek Error Rate is shown as REAL VALUE - 0; CURRENT - 81; WORST - 60; THRESHOLD - 30. What is the difference between the Real and Current Values? How can the Current value be higher than the Worst value? And what is Threshold the threshold of?
Health tab reports S.M.A.R.T. data
For more information on S.M.A.R.T see
https://en.wikipedia.org/wiki/S%2EM%2EA%2ER%2ET%2E#Known_ATA_S.M.A.R.T._attributes