POWER SAVING CONTROL SYSTEM AND POWER SAVING CONTROL METHOD IN ENVIRONMENT OF PLURALITY OF HARD DISK DRIVES

摘要

PROBLEM TO BE SOLVED: To provide a power saving control system and a method in the environment of a plurality of inexpensive HDDs while having large power saving effect without bringing the deterioration in response to input/output and the decline of life of the HDD. SOLUTION: This power saving control system and the power saving control method is provided with an input/output monitor means 13 for investigating the access frequency, etc., to each HDD by monitoring the input/output for files of each HDD 2, an idle time detecting means 16 for detecting the idle time, etc., of each HDD, a file copy means 15 for copying the file of high access frequency in the HDD of low access frequency to the HDD of the high access frequency, a file write-back means 14 for writing back the file copied by the file copy means 15 to the original HDD, an HDD number rereadable means 12 for replacing the HDD number objective for the input/output with the HDD number copied by the file copy means 15, and a driving device start/stop means 112 for starting/stopping the driving device of each HDD.