HP 3PAR StoreServ 7200 2-node HP 3PAR StoreServ 7000 Storage Site Planning Man - Page 27

Table 12 Required Cables Cable Type Outside Diameter SAS 6.60 - 7.75 mm, depending on the length Ethernet (Category 5) 3 cables minimum Standard with 3 static IPs HP recommends that you have at least one Ethernet connection per node pair. 7400 4 Node, Link Cable Multimode Fibre Channel 6.7 mm 1.6 mm Connector Type Mini SAS SFF8088 RJ-45 PCI Express LC-LC External Cable Connections The following shows specific guidelines for connecting the controller nodes to the network and to host computers. Refer to "Supported Network Topologies" (page 28) for descriptions of the supported network topologies. Table 13 External Controller Node Connections Connection Type Minimum Configuration Recommended Configuration Ethernet Connection from the Ethernet switch See "Supported Network Topologies" or hub to two controller nodes (page 28) Fibre Channel Connection from a host computer to one controller node Separate connections from host computers to each node, via a switch, with connections distributed evenly across all nodes1 Maintenance None Varies according to system and network configuration 1 To provide redundancy and to permit online software upgrades, both controller nodes in a node pair (for example, nodes 0 and 1 and nodes 2 and 3) must maintain connections to each host server. • Each controller node supports one Ethernet connection to a switch or hub. Separate connections from the Ethernet switch or hub to at least two controller nodes are required to support redundancy. With redundancy, one IP address is shared between the two connections and only one network connection is active at a time. If the active network connection fails, the IP address is automatically moved to the surviving network connection. • At a minimum, the storage system requires one Fibre Channel (or iSCSI) connection from a host computer to a controller node. However, HP recommends separate connections from each host computer to each of the controller nodes in the storage system, with connections distributed evenly across all nodes. The following shows the maximum supported Fibre Channel cable length based on the cable size and port speed: Table 14 Cable Limitations for Fibre Channel Host Connectivity Cable Size 62.5 micron 62.5 micron 50 micron 50 micron Speed 2 Gb/s 4 Gb/s 2 Gb/s 4 Gb/s Cable Length Limit 100 meters 70 meters 300 meters 150 meters External Cable Connections 27