Dell Compellent Controllers offer the flexibility to meet changing enterprise requirements. Any combination of RAID levels can exist on a single Storage Center. Multiple RAID levels can exist on the same storage tier within an array. Compellent controllers whether Series 40 or Series 30 provide automatic failover capabilities and are Hot-Swappable when implemented in a clustered configuration. Dell Compellent controllers support a combination of 4Gb FC - 3Gb SAS or 6Gb SAS connectivity - depending on the HBAs utilized. Virtual ports increase port capacity - drive bandwidth - I/O connectivity and port failover.