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5 Cabling the Storage System
For more information about cabling drive enclosures (SAS) before you continue to cable the system,
visit www.hp.com/go/3par. Scroll to Support, and click HP 3PAR StoreServ 7000 Support and
then Manuals. Then scroll to Setup and install — general and select the specific HP 3PAR StoreServ
7000 Storage Cabling Configuration Guide.
Cabling Controller Nodes
Nodes are numbered 0 to 3 from bottom to top. Connections between Nodes 0 and 1 and Nodes
2 and 3 use four large interconnect cables.
These cables are directional and must be installed correctly for the storage system to function
properly. When inserting the cables, you should hear a click to confirm the cable is correctly
installed. If you have to force the connector, the connector is upside down and needs to be inverted.
The direction of the cable connection is indicated by labels on either end of the cable.
In Figure 32 (page 34), see label A for interconnecting node 0 or 1. See label C for interconnecting
node 2 or 3.
Figure 32 Interconnecting the Controller Nodes
Host/Ethernet Cables
Table 5 External Controller Node Connections
Recommended ConfigurationMinimum ConfigurationConnection Type
See the section Supported Network
Topologies in HP 3PAR StoreServ 7000
Storage Site Planning Manual.
Connection from the Ethernet switch
or hub to two controller nodes
Ethernet
Separate connections from host
computers to each node, through 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 or 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
34 Cabling the Storage System