A disaster recovery technology capable of achieving the high-speed FO and correctly reading the logs even if the unit of logs written in the main site is large is provided. In the disaster recovery system comprising a main site and a sub-site, when the writing in units of a log block consisting of a...http://www.google.de/patents/US20060242370?utm_source=gb-gplus-sharePatent US20060242370 - Disaster recovery method, disaster recovery system, remote copy method and storage system
