Figure 3.1 Single Path Connection (Direct Connection); Figure 3.2 Single Path Connection (Switch Connection) - Fujitsu ETERNUS DX60 S2 User Manual

Chapter 3 Connections
3.1 Host Connections
Server
HBA
Port
Figure 3.1
Server
HBA
Port
Figure 3.2
■
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.
ETERNUS DX60 S2 Disk storage system User's Guide -Site Planning-
Server
HBA
Port Port Port
CM#0 CM#1
ETERNUS DX Disk storage system
Single path connection (direct connection)
Server
HBA
Switch
Port Port Port
CM#0 CM#1
ETERNUS DX Disk storage system
Single path connection (switch connection)
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.
Copyright 2012 FUJITSU LIMITED
Server
HBA
43
P3AM-5492-04ENZ0