Failure trend detection and correction in a data storage array

摘要

Method and apparatus for detecting and correcting parametric failure trends in a data storage array. A plurality of data storage devices, such as hard disc drives, are arranged to form a multi-device addressable memory array space. A controller controls access to the array space, and is configured to accumulate operational performance data from each of the devices into a history log. A statistical analysis engine of the controller analyzes the data to detect anomalous operation of the devices, including a horizontal analysis of data across multiple devices. The controller initiates a data storage device specific corrective action event in response to the analysis, as required. The analysis by the engine can be in addition to, or in lieu of, analysis by the individual devices. A data request block requests additional data samples for a given parameter, or requests additional parametric data to further the analysis.