Power-On Self-Test (POST)
pcA diagnostic testing process performed by a computer's firmware upon startup.
expanded
Power-On Self-Test (POST) is a diagnostic sequence that runs when a computer is powered on. It checks hardware components such as memory, storage devices, and system buses to ensure they are functioning correctly before booting the operating system. POST is crucial for early detection of hardware failures, allowing for maintenance or replacement before the computer is fully operational.
examples
During the boot sequence of a Dell XPS 13, the POST checks memory modules, drives, and peripheral connections.
Most laptops, including the Dell XPS 13 (Model No: 9310), initiate POST at power-up to verify component integrity.
A HP ProLiant DL380 server utilizes POST to assess CPU and memory configurations before loading server software.
In server environments such as those using Hewlett-Packard's ProLiant DL380 series, POST helps ensure stability and functionality for mission-critical operations.