Patent ID: 11868630
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A storage system comprising:
a first node mounting two controllers; and
a plurality of storage media,
the two controllers of the first node being subjected to setting of redundancy such that the two controllers belong to differing redundancy groups, respectively,
in a case where a configuration change is requested due to addition of a second node mounting at least one of other controller to the storage system,
the second node being configured to execute a first process of setting the at least one other controller of the second node belongs to a redundancy group to which either of the two controllers of the first node belongs, and
the first node being configured to:
execute a second process of changing the setting of redundancy such that setting information on the redundancy group of either of the two controllers of the first node does not change; and
execute a third process of deactivating a controller of the two controllers of the first node for which the setting information on the redundancy group changes as a result of a change in the setting of redundancy,
wherein the controller of the two controllers of the first node holds first management information for setting the redundancy using one node, and second management information for setting the redundancy using two or more nodes,
wherein the first management information and the second management information include the setting information on the redundancy group to be set to the controller of the two controllers of the first node mounted on the first node, and
wherein, in the first process, the at least one other controller of the second node refers to the first management information and the second management information to determine the redundancy group to which the other controller belongs on a basis of a same setting information on the redundancy group in the first management information and the second management information.