GSmartControl is a graphical user interface for smartctl (from smartmontools package), which is a tool for querying and controlling SMART (Self-Monitoring, Analysis, and Reporting Technology) data on modern hard disk and solid-state drives. It allows you to inspect the drive's SMART data to determine its health, as well as run various tests on it. GSmartControl supports all major desktop operating systems, including Linux, Windows, macOS, FreeBSD, and other BSD-style operating systems. Self-monitoring, analysis, and reporting technology, or SMART, is a monitoring system for hard drives to detect and report various indicators of reliability, in the hope of anticipating failures. SMART is implemented inside the drives, providing several ways of monitoring the drive's health. It may present information about general health, various drive attributes (for example, the number of unreadable sectors), error logs, and so on.