FAULT TOLERANT LIC KEY FOR SB9200 Fault Tolerant CPU Failover feature for the SANbox 9000 allows you harden your core SAN solution for 99.999% ultra-high availability with the transparent CPU failover Fault Tolerant capability. Any SB9200 BASE Model with dual CPU blades can optionally be upgraded to provide automatic and non-disruptive CPU failover to a secondary Hot Standby CPU in the event of a real-time detected fault condition in the Primary CPU.