HDD manufacturers don’t provide information regarding their SMART attributes to the general public. In fact even their own tech support staff appear not to be privy to it. Any information that is “out there” appears to have been deduced from experimentation and observation.
Worse still, SMART attributes are not standardised, so each manufacturer is free to define their SMART attributes in their own proprietary way. In fact the meaning of these attributes often changes between models from the same manufacturer, and can even vary between firmware versions for the same model.
In short, the meaning of the raw values is determined by the firmware according to a spec that only the comppany’s firmware programmers appear to have access to. If you ask WD’s Tech Support, they will most probably direct you to Wikipedia.
I would watch C6. If the raw value drops to zero at some time in the future, or if it increases and then subsequently decreases, then this would suggest that it is computed from a rolling average.
