DISK ARRAY CONTROLLER, DISK ARRAY CONTROL METHOD AND DISK ARRAY SYSTEM

摘要

PPROBLEM TO BE SOLVED: To construct a logical disk having as much fault tolerance as possible in a disk array system in which data are redundantly stored in a plurality of disks including disks whose capacities are different. PSOLUTION: An RAID group is set preferentially from a disk having a large residual capacity to reduce the deviation of the residual capacity, thereby stting the logical disk having as much fault tolerance as possible. PCOPYRIGHT: (C)2006,JPO&NCIPI