HP 3PAR StoreServ 7000 Storage Site Planning Manual

Required Cables
The quantities and lengths of the cables required for storage system installation vary according to
the specific storage system and network configuration. Fibre Channel cables are used externally
to connect the controller node to the customer switch or host (in the case of a directly connected
host). The SAS cables are used to connect the controller node to the drive enclosures.
Table 12 Required Cables
Connector TypeOutside DiameterCable Type
Mini SAS SFF80886.60 – 7.75 mm, depending on the
length
SAS
RJ-45StandardEthernet (Category 5) 3 cables minimum
with 3 static IPs
HP recommends that you have at least
one Ethernet connection per node pair.
PCI Express6.7 mm7400 4 Node, Link Cable
LC-LC1.6 mmMultimode Fibre Channel
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 29) for descriptions of the supported
network topologies.
Table 13 External Controller Node Connections
Recommended ConfigurationMinimum ConfigurationConnection Type
See “Supported Network Topologies”
(page 29)
Connection from the Ethernet switch
or hub to two controller nodes
Ethernet
Separate connections from host
computers to each node, via a switch,
with connections distributed evenly
across all nodes
1
Connection from a host computer to
one controller node
Fibre Channel
Varies according to system and network
configuration
NoneMaintenance
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:
28 Network, Cabling, and Connectivity