Figure 3.2 Single Path Connection (Switch Connection); Figure 3.3 Multipath Connection (Direct Connection) - Fujitsu ETERNUS DX80 S2 User Manual

Chapter 3 Connections
3.1 Host Connections

Figure 3.2 Single path connection (switch connection)

Server
HBA
Port Port
CA
CM#0
ETERNUS DX Disk storage system
■ Multipath configuration
A multipath configuration connects the ETERNUS DX Disk storage system to a server via multiple paths
(multipath). System reliability is improved due to the path redundancy. For multipath connections, driver
software to control multipathing is required.
If a path fails, access can continue by using the path failover function that switches access from the failed path
to another path. The performance of the system can be improved by using the load balancing function to
spread the access load over multiple paths.

Figure 3.3 Multipath connection (direct connection)

Server
HBA HBA
Port Port Port
CA
CM#0
ETERNUS DX Disk storage system
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Site Planning-
Server Server
HBA HBA
Switch
Port Port
CA
CM#1
Server
HBA
Port Port Port Port Port
CA CA CA
CM#1
Copyright 2013 FUJITSU LIMITED
HBA
49
P3AM-4822-12ENZ0