Patent ID: 7447843
Filing Date: 2008-11-04
Classification: G06F

Abstract:
1. A storage system, comprising: a storage device which provides a plurality of logical volumes which can be accessed from a plurality of application programs; a controller for controlling input and output of data to and from said logical volumes in response to input/output requests from said plurality of application programs; and a cache memory for temporarily storing data input to and output from said logical volumes, wherein said cache memory is logically divided into a plurality of partitions which are exclusively assigned to said plurality of logical volumes respectively, wherein logical dividing of the cache memory into partitions is executed by user operation, wherein a list related to the partitions is displayed on a display for the user, and the user sets or modifies, via the display, the divided partitions, wherein said plurality of partitions are configured such that a segment size of each segment of a plurality of segments of said cache memory can be independently adjusted, and wherein said controller restrains input and output of data to and from the logical volume corresponding to a partition in which said segment size is adjusted, and destages dirty data stored in said partition to said storage device, and thereafter independently adjusts said segment size for each partition.