Required Cables; External Cable Connections; External Controller Node Connections - HP 3PAR StoreServ 7450c Planning Manual
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Also See for 3PAR StoreServ 7450c:
- Service manual (78 pages) ,
- Troubleshooting manual (75 pages) ,
- Specifications (51 pages)
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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
Cable Type
SAS
Ethernet (Category 5) 3 cables minimum
with 3 static IPs
HP recommends that you have at least
one Ethernet connection per node pair.
7450 4 Node, Link Cable
Multimode Fibre Channel
External Cable Connections
The following shows specific guidelines for connecting the controller nodes to the network and to
host computers. Refer to
network topologies.
Table 13 External Controller Node Connections
Connection Type
Ethernet
Fibre Channel
Maintenance
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:
Outside Diameter
6.60 – 7.75 mm, depending on the
length
Standard
6.7 mm
1.6 mm
"Supported Network Topologies" (page 28)
Minimum Configuration
Connection from the Ethernet switch
or hub to two controller nodes
Connection from a host computer to
one controller node
None
Connector Type
Mini SAS SFF8088
RJ-45
PCI Express
LC-LC
for descriptions of the supported
Recommended Configuration
See
"Supported Network Topologies"
(page 28)
Separate connections from host
computers to each node, via a switch,
with connections distributed evenly
1
across all nodes
Varies according to system and network
configuration
Required Cables
27
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