The 'Threshold' column is the score in the ranking system that would indicate the drive is probably failing. Here, except for the temperature and Spin Up Time, all of the 'Worst' values are equal to the 'Value' values, meaning none of them have fallen from the best possible rank. The 'Worst' column is the drive's current score on that attribute's rank. So for an attribute that has a 'Value' of 200, that means 200 is the best, 199 is the next best, and you have no idea how much it takes to go from 200 to 199. The ranking doesn't represent the actual value, any more than it would to say the person who came in first place won 20 points by finishing the race in 3 minutes 38 seconds, the person who came in second won 7 points by finishing the race in 5 minutes 2 seconds, and so forth they would still be ranked 1 and 2, and there's no way for you to know what the actual value is from the rank. Here, 200 is the winner, 199 came in second place, and so on. It's backwards to what we would usually think of a rank system, where #1 is the winner, #2 came in second place, and so forth. The 'Value' column shows the maximum possible ranking some of these are ranked 200 to 0, some are 139 to 0, and so on, where 200 is the best possible ranking and 0 is the worst possible ranking. SMART readings are not very intuitive (okay, totally confusing) if you haven't seen them before.

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