Described are techniques for use in determining a dynamic mirror service policy (DMSP) for a plurality of mirror devices. The DMSP determines which of the plurality of mirror devices services I/O operations associated with a logical volume (LV), such as a read operation, at a particular point in time....http://www.google.de/patents/US6633955?utm_source=gb-gplus-sharePatent US6633955 - Four way support for dynamic mirror service policy
