Statistic-based isolation of lethargic drives

摘要

A method is provided for identifying a lethargic drive. The method includes identifying a timing bucket unique to a drive located in a redundant array of independent disks (RAID) configuration, computing a delta-count for the timing bucket at a predetermined time, including determining a difference between a counter for the timing bucket at the predetermined time and the counter for the timing bucket at a time when the drive was replaced within the RAID configuration, comparing the delta-count for the timing bucket to a predetermined threshold, and determining whether the drive is lethargic, based on the comparing.