S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) is a
diagnostic method originally developed by
IBM
that at that time referred to as "Predictive Failure
Analysis". This technology was developed for IBM mainframe drives
to give advanced warning of drive failures. Based on this diagnostic,
Compaq announced IntelliSafeTM, which was submitted to the ATA/IDE
standards committees and the resulting standard was named S.M.A.R.T.
S.M.A.R.T. analyzes many of the mechanical attributes; over time,
some failures can be predicted by detecting if the hard disk drive is
moving out of tolerance. While the S.M.A.R.T. technology can detect
upcoming issues, not all hard drive failures are predictable.
All this means on most modern drives is the hard drive is coming close to the maximum tolerances
I usually switch off in the bios smart monitoring.
This system is trying to predict a possible failure, which may or may not occur..
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