The IBM System Storage N series storage controllers are designed to provide fast data access, simultaneous multiprotocol support, expandability, upgradeability and low maintenance requirements.The Model A11 is designed to provide a single-node storage controller with iSCSI support, and NFS, CIFS, and FCP support via optional features. The N7700 is a 6U storage controller that must be mounted in a standard 19-inch rack.The Model A11 can be upgraded to a maximum of 14 multipath (loop A and loop B) FC loops (28 2-Gbps FC ports) via the addition of optional FC HBAs for Disk Attachment. The 14 loops will support a maximum of 840 total disk drives, though not all loops can be fully populated.The Model A11 can be upgraded to a maximum of 14 Gigabit Ethernet ports via the addition of two optional quad-port copper Gigabit (NICs).