Provided are a method, system, and article of manufacture, wherein a request is received for switching a logical volume from one state to another state, wherein the logical volume is in a mirrored state if data corresponding to the logical volume is mirrored from a first storage to a second storage,...http://www.google.com.au/patents/US7254686?utm_source=gb-gplus-sharePatent US7254686 - Switching between mirrored and non-mirrored volumes
