![]() ![]() When operational, the drive monitors how often these metrics hit a warning threshold. attributes, which monitor a variety of metrics such as read error rate, disk surface error rate, spin-up time, data throughput, write-head stability, and spin-up retries, among many other options.Įach attribute has an absolute value (raw) defined by the manufacturer and a normalized value on a scale of 100 to 1 or 200 to 1. More information about the drive's health can be obtained by examining the S.M.A.R.T. ![]() status, which includes two values, “disk OK” or “disk drive fail”, which are based on the values “threshold not exceeded” and “threshold exceeded”. The disk health monitoring technology was standardized by the Small Form Factor (SFF) committee in the mid-90s, based on technology developed by computer manufacturer Compaq and disk drive makers Seagate, Quantum and Conner. It is a hard drive and flash disk monitoring system that tracks indicators of drive reliability and informs the user about them, allowing enough time for data backup if needed. S.M.A.R.T., also written as SMART, is the acronym for Self-Monitoring, Analysis and Reporting Technology. This is a feature that lets a disk drive test itself for potential problems. status that a lot of disk drives include. If files were corrupted out of the blue, an external drive you usually connect to the Mac doesn’t operate properly, or your computer doesn’t boot, then it’s time to check the health of your hard disk using Disk Utility via the S.M.A.R.T. ![]()
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