1. A system comprising: a first level storage component in which a storage state indication is tracked externally, wherein a first coherency maintenance approach is implemented at the first level storage component while the storage state indication tracked externally is compatible with a second coherency maintenance approach, wherein the first level storage component is an L2 cache; and a second level storage component for receiving information from the first level storage component and acting upon the information based at least in part on the storage state of information associated with the first level storage component, wherein the second coherency maintenance approach is implemented at the second level storage component, wherein the second level storage component is an L3 cache.