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A or by the controller B. The Passive IDs will only become functional when a Single-
Controller fails in the system. The MPIO driver is a must on the application servers. The
driver communicates with system firmware and performs load balance and automated
distribution of I/O’s across preferred paths (Active IDs on data paths). TPGS (Target Port
Group Service) is supported so that I/O’s are routed to the preferred paths.
Switched Fabric Connection (Single-Controller)
Channels
Controller A
Host
CH0, CH1, CH2, CH3
Configuration Information
Controller
1
Host server
4
Data path connection
Data paths are attached to one or more FC
switches. SAN management measures,
such as switch zoning and port binding,
should be taken to avoid multiple servers
from accessing the same LUN.
