The Model G20 is designed to provide identical function as the N5200 Model G10, but with the addition of the Clustered Failover (CFO) function. The N5200 Model G20 consists of two active/active processing nodes that are designed to provide a high-availability environment, helping improve overall reliability. The N5200 Model G20 also supports a maximum of 168 LUNs, 4 GB of ECC memory, and eight Fiber Channel ports (16 with the addition of expansion HBA features).