Patent ID: 11960771
Assignee: HITACHI, LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 1:
2. The storage system according to claim 1, wherein
the storage apparatus, when receiving, from the first controller, a read-out request for the data in the predetermined storage area, and predetermined version information representing a version of the predetermined storage area at a timing of registration of the second mapping information, determines whether or not the predetermined version information and version information about a latest version of the predetermined storage area match, and, if the predetermined version information and the version information do not match, transmits, to the first controller, response information representing that the predetermined version information has been updated, and
the first controller, when receiving the response information, acquires the post-migration mapping information from the second controller, and updates the second mapping information by using the post-migration mapping information.