Storage system for multi-site remote copy

摘要

Information about remote copy target volumes of other storage systems 2 each having one and the same original volume V 1 is registered for each remote copy target volume in advance. When there occurs a failure in a copy source storage system 2, a copy source volume for remote copy target volumes using the storage system 2 having a failure as their copy source is selected newly from the registered copy source volumes, and remote copy is resumed.