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configuration can withstand a failure of a single component, e.g., controller, HBA,
cable, or FC switch.
Each logical partition is redundantly mapped to multiple host channel IDs in an AAPP
(Active-Active-Passive-Passive) configuration. Logical volumes are managed either
by the controller A or by the controller B. The Passive IDs will only become functional
when a single controller fails in the system. The EonPath driver is a must on the
application servers. The driver communicates with system firmware and performs
load balance and automated distribution of I/Os across preferred paths (Active IDs
on data paths). TPGS (Target Port Group Service) is supported so that I/Os are
routed to the preferred paths.
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