Method and system to save historical hard disk performance data

摘要

Method and system to save historical hard disk performance data are described. In one embodiment, the method and system include storing historical hard disk performance data on a non-volatile memory unit of a system; the data being available on the memory unit after the system has been rebooted. In one embodiment, the non-volatile memory unit is a cache of the hard disk. Furthermore, the historical performance data may be used to implement a power management policy of the hard disk.