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NOTE
In the event of Single Controller failure, a logical drive is accessed through the host
IDs managed by the alternate controller. Host IDs and port IPs do not fail-over to the
surviving controller. Therefore, the EonPath multipath driver is necessary for path
redundancy and controller failover.
Single Controller with Fault-Tolerant Path
Component
Description
Unified Storage
system
Single-Controller, with a total of 4 host ports
HBA or NIC
iSCSI initiators, preferably PCI-E TCP/IP offload
engine (TOE) capable cards
GbE cables
GbE network cables
Software
EonPath to manage the fault-tolerant paths with
failover/ failback and load balance
RAID
configuration
4 logical partitions (created from 2 logical volumes)
2 Logical Volumes (each contains a logical drive)
2 Logical Drives
* Each logical partition appears on two different host
links for the purpose of fault tolerance. Use EonPath
multipath software so that your operating system can
identify alternate paths to the same logical drive.