Patent ID: 9250809
Filing Date: 2016-02-02
CPC Classification: G06F

Claim Text:
1. A compound storage system, comprising: one or more storage boxes comprising multiple storage devices; and one or more storage systems coupled to the one or more storage boxes, and configured to receive an I/O (Input/Output) command from a host apparatus, wherein an owner right is set in one of the one or more storage systems; when a configuration change occurs, a storage area is changed in accordance with a command from a storage system which caused the configuration change, wherein the configuration change is a change in a number of storage systems coupled to the storage boxes; the storage area is an area associated with an owner right set to a storage system that exists after the configuration change, each of multiple owner rights being a right to process the I/O command to the storage area which is associated with the owner right; and write data to a storage area is stored in at least one of the multiple storage devices which provide the storage area.