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Chapter 3 Connections
3.1 Host Connections
ETERNUS DX80 S2/DX90 S2 Disk storage system User’s Guide -Site Planning-
Copyright 2013 FUJITSU LIMITED P3AM-4822-12ENZ0
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Figure 3.2 Single path connection (switch connection)
■ 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
Server
HBA
Server
HBA
Switch
ETERNUS DX Disk storage system
CM#0
CA
Port
Port
CA
CM#1
Port Port
Server
HBA
HBA
Server
HBA
HBA
ETERNUS DX Disk storage system
Port
CA
Port
CM#0
Port
CA
Port
Port
CA
Port
Port
CA
Port
CM#1