Indeed. And so far the only pice of software I know that is halfway
competent in this area. The rest just gives you plain data
without interpretation.
IME, some of the worst SMART tools are the ones where the author has
offered his own, often incorrect, interpretation without supplying the
actual raw data so that we can make our own judgments.
For example, the author of HD Tune doesn't appear to understand that
raw attribute values are 48-bit numbers rather than 32-bit. HD Tune
will therefore sometimes report negative decimal numbers for the "LBAs
Read and Written" attributes.
PCWizard's author only quotes the lowest 20 bits, and has no idea how
Seagate's Seek Error Rate and Raw Read Error Rate numbers are encoded.
Therefore a score of 60 for the Seek Error Rate is given a low health
assessment whereas in reality it usually reflects error-free
performance.
Some attribute values make no sense in decimal format. Their true
meaning is often only visible when expressed in hexadecimal.
- Franc Zabkar