Patent ID: 8918551
Filing Date: 2014-12-23
Classification: G06F

Abstract:
1. A storage system coupled to a host computer, comprising: a management computer; a plurality of storage devices that are provided as a plurality of logical storage devices to the host computer; a plurality of interface packages, each of the plurality of interface packages coupled to the management computer and comprising at least one interface unit; a shared memory that stores control information for the plurality of logical storage devices, said control information including ownership information for the logical storage devices; a plurality of micro-processor packages, each of the plurality of micro-processor packages comprising at least one micro-processor; wherein each interface unit comprises management information for managing the plurality of micro-processor packages, said micro-processor package in-charge of controlling input/output processing for the storage area of the logical storage devices, and wherein each of the plurality of micro-processor packages: (1) receives a request for changing ownership from a first micro-processor package, which is in charge of a logical storage device whose load is higher than other logical storage devices, to a second micro-processor package whose load is lower than other micro-processor packages; and (2) sets the management information and the control information such that the second micro-processor package is in charge of a logical storage device which the first micro-processor package was in charge of; and wherein the management computer: