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Chapter 3 Connections
3.1 Host Connections
ETERNUS DX60 S2 Disk storage system User’s Guide -Site Planning-
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Copyright 2012 FUJITSU LIMITED P3AM-5492-04ENZ0
Figure 3.1 Single path connection (direct connection)
Figure 3.2 Single path connection (switch connection)
■ Multipath configuration
A multipath configuration connects the ETERNUS DX Disk storage system to a server via multi-
ple 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.
Server
HBA
Server
HBA
ETERNUS DX Disk storage system
CM#0
Port
Port
CM#1
Port Port
Server
HBA
Server
HBA
Server
HBA
Switch
ETERNUS DX Disk storage system
CM#0
Port
Port
CM#1
Port Port
To use the load balancing function, four or more paths must be used to con-
nect the server and the ETERNUS DX Disk storage system.