A primary data mover monitors both consistency time and idle time in a system that performs continuous, asynchronous, extended remote copying between primary and remote processors, and manages both with accuracy and consistency. The primary data mover detects system activity levels and manages data accuracy...http://www.google.de/patents/US6105078?utm_source=gb-gplus-sharePatent US6105078 - Extended remote copying system for reporting both active and idle conditions wherein the idle condition indicates no updates to the system for a predetermined time period
