Access Method; Figure 106 Single Path Connection (When A San Connection Is Used - Direct Connection); Figure 107 Single Path Connection (When A San Connection Is Used - Switch Connection) - Fujitsu ETERNUS DX S5 Series Design Manual

5. Connection Configuration
SAN Connection

Access Method

This section explains the connection configurations between server Host Bus Adapters (HBAs) and ETERNUS DX
host interface ports.
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Single Path Connection
A single path configuration connects the ETERNUS DX to a server via a single path.
The server cannot access an ETERNUS DX when a component (such as a controller, HBA, switch, or cable) on the
path has a problem. The system must be stopped when a failed component on a path needs to be replaced or
when the controller firmware needs to be updated.
In a single path connection configuration, the path failover and load balancing functions are not supported.
A multipath connection configuration is recommended to maintain availability when a problem occurs.
Figure 106 Single Path Connection (When a SAN Connection Is Used – Direct Connection)
Server
HBA
Port Port
CA
CM#0
Figure 107 Single Path Connection (When a SAN Connection Is Used – Switch Connection)
Server
HBA
Port Port
CA
CM#0
Server
HBA
Port Port
CA
CM#1
ETERNUS DX
Server Server
HBA HBA
Switch
Port Port
CA
CM#1
ETERNUS DX
213 Design Guide