A data management system for storage area networks (SANs) includes an authentication and directory service that integrates the management of cache coherency and synchronization into an authentication mechanism, referred to herein as a ticket. The data in the system is notionally classified into colors....http://www.google.de/patents/US6792424?utm_source=gb-gplus-sharePatent US6792424 - System and method for managing authentication and coherency in a storage area network
