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Prior to performing any zone configuration changes using ECC , it is good practice to rediscover the fabric . Director-class hardware therefore helps contribute to a true 99.999 percent uptime within the system . Beyond meeting the basic requirements of nondisruptive software upgrades and redundancy of all critical hardware components , the Cisco MDS 9500 Series software architecture offers an unparalleled level of availability . This mode aims to simplify the deployment and support replication services on all ports available in the fabric , both SSM FC ports and " normal " FC ports . It reminds us of the old dot com joke " If you want to make a small fortune on the Internet , start with a large one .