| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage device maintaining high-speed I/O throughput. SOLUTION: The storage device includes: a load factor calculating part for calculating the load factors of a plurality of physical devices; a load factor determining part for determining whether or not the load factors of the physical devices calculated by the load factor calculating part are equal to or greater than a predetermined threshold value; a command ratio determining part for determining whether or not the command ratio of either a write command or a read command issued from a host computer is equal to or greater than a predetermined threshold value, if the load factor determining part determines that the load factors of the physical devices are equal to or greater than the predetermined threshold value; and a switching part for replacing data with parities among the plurality of physical devices if the command ratio determining part determines that the command ratio is equal to or greater than the predetermined threshold value. COPYRIGHT: (C)2008,JPO&INPIT |
