Self-Monitoring, Analysis and Reporting Technology
Self-Monitoring, Analysis, and Reporting Technology (contrived acronym S.M.A.R.T. or SMART) is a monitoring system included in computer hard disk drives (HDDs) and solid-state drives (SSDs). Its primary function is to detect and report various indicators of drive reliability, or how long a drive can function while anticipating imminent hardware failures.
Source: Wikipedia — Self-Monitoring, Analysis and Reporting Technology (CC BY-SA 4.0)