Patent ID: 7380094

Claim:
A storage system comprising: a plurality of channel control units; a plurality of disk control units; shared memory; cache memory; a physical disk connected to said disk control units; connecting parts that connect said plurality of channel control units, said plurality of disk control units, said shared memory, and said cache memory, wherein memory resources within the storage system are managed by a system manager, and partitions of the memory resources are managed by partition managers assigned for every partition unit; a management module that modifies the configuration of said memory resources in accordance with the setting contents set by said system manager or said partition managers; a history data management module that creates history data which correlates the identifier of the partition unit in which the configuration of the memory resources has been modified, the setting contents, and the identification data of a partition manager, wherein said history data management module provides all history data stored in said history data storage unit to said system mangers, but provides to said partition manager only the history data that is made by the partition manager itself, from among the history data stored in said history data storage unit; a history data storage unit that stores the history data, wherein said management module modifies the configuration of said memory resources in accordance with the setting contents set by said partition managers managing partition units of the memory resources; and a management terminal for modifying the configuration of said memory resources, wherein the system manager accesses the management terminal via a first data processing unit, wherein the partition managers access the management terminal via a second data processing unit, wherein the management terminal comprises a first table and a second table, wherein the first table correlates, with the system manager, a logical volume, cache memory capacity, and a port associated with a first group of memory resources in the storage system, wherein the second table correlates, with a partition manager, a logical volume, cache memory capacity, and a port associated with a second group of memory resources in the storage system, wherein a plurality of users may simultaneously log in to the management terminal, whereas only a user acquiring permission to modify configuration may modify the configuration of memory resources, and wherein the system manager can refer to operation logs regarding configuration modifications made by all partition managers, whereas the partition manager can only refer to his or her own operation logs.