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) - Fujitsu ETERNUS DX100 S4 Design Manual

4. Connection Configuration
SAN 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
Port Port
CA
CM#0
ETERNUS DX
Figure 84 Single Path Connection (When a SAN Connection Is Used — Switch Connection)
Server
HBA
Port Port
CA
CM#0
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
Server
HBA
Port Port
CA
CM#1
Server Server
HBA HBA
Switch
Port Port
CA
CM#1
ETERNUS DX
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