Patent ID: 8037246

Claim:
A storage system, comprising: a plurality of ports, each receiving data from at least one of a plurality of data processing devices; a cache memory storing data received via said plurality of ports; a plurality of RAID (Redundant Arrays of Inexpensive Disks) groups, each comprising a plurality of disks storing data stored in said cache memory; a first resource group comprising a first port selected from said plurality of ports, a first cache portion logically partitioned in said cache memory, and a first RAID group selected from said plurality of RAID groups; a second resource group comprising a second port selected from said plurality of ports, a second cache portion logically partitioned in said cache memory, and a second RAID group selected from said plurality of RAID groups; and a module managing first log information of said first resource group and second log information of said second resource group on a resource group basis, wherein said first log information comprises a time of performing a first login operation for logging in the first resource group and information indicating whether or not the first login operation has been executed appropriately, wherein a first manager is permitted to refer to said first log information assigned to said first resource group and to modify a configuration of said first resource group, wherein said second log information comprises a time of performing a second login operation for logging in the second resource group and information indicating whether or not the second login operation has been executed appropriately, wherein a second manager is permitted to refer to said second log information assigned to said second resource group and to modify a configuration said second resource group, and wherein a system manager is permitted to refer to both said first log information and said second log information, and to modify the configuration of said storage system.