There is a support only primus which documents this issue emc289297 There is a workaround which support can assist you carry out to resolve this issue "temporarily" This issue is going to be resolved in a later release of Flare Code on both VNX and CLARiiON This does not affect the usage of fast cache and is primarily a display issue  Gearoid
Has anyone else experienced an issue with their FAST Cache disappearing from Unisphere? It intermittently disappears from both of our CX4-480 arrays after upgrading to the latest .524 Flare. I'm noticing at the same times that it is missing, our 3rd party statistics collector shows 'no statisticts' for our FAST Pools.
FAST Cache missing in Unisphere