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

Claim 5:
6. The method for changing a configuration of a storage system according to claim 2, further including:
a step of activating, in a case where the configuration change is requested that involves removing the second node from the storage system, by the controller of the two controllers of the first node activated, the deactivated controller of the first node;
a step of saving, by the at least one other controller of the second node for which the redundancy group is set, data stored in a cache memory of the at least one other controller;
a step of switching, by the controller of the two controllers of the first node activated before being requested the removing of the second node, from the second management information to the first management information; and
a step of deactivating, by the at least one other controller of the second node, the at least one other controller for which the redundancy group is set.