Fujitsu ETERNUS DX100 S3 - Access Method; Figure 83 Single Path Connection (When a SAN Connection Is Used - Direct Connection); Figure 84 Single Path Connection (When a SAN Connection Is Used - Switch Connection)

Access Method
This section explains the connection configurations between server Host Bus Adapters (HBAs) and
ETERNUS DX
host interface ports.
■
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 oc-
curs.
Figure 83 Single Path Connection (When a SAN Connection Is Used — Direct Connection)
Server
HBA
Server
HBA
ETERNUS DX
CM#0
CA
PortPort
CA
CM#1
Port Port
Figure 84 Single Path Connection (When a SAN Connection Is Used — Switch Connection)
Server
HBA
Server
HBA
Server
HBA
Switch
ETERNUS DX
CM#0
CA
PortPort
CA
CM#1
Port Port
4. Connection Configuration
SAN Connection
149
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems
Design Guide (Basic)
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