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High Availability IP SAN (Recommended for Remote Replication)
Component
Description
Storage system
Redundant controllers with eight host ports
HBA
iSCSI initiators, preferably PCIe TOE (TCP/IP offload engine)-capable
cards
GbE cables
GbE network cables
GbE switch
Ports divided into 2 virtual LANs. Both controllers are linked to both
virtual LAN zones.
Software
MPIO to manage the fault-tolerant paths with failover/failback and load
balance capabilities. Use MPIO multipathing software for the operating
system to identify the alternative paths to the same logical drive.
RAID configuration
•
Two logical drives; each has eight member drives. You can create
more logical drives from the drives in the expansion systems.
•
LD0 mapped to CH0 AID, CH1 BID, CH2 AID, and CH3 BID.
LD must be assigned to controllers A and B to enable remote
replication.
•
LD1 mapped to CH1 BID, CH0 AID, CH3 BID, and CH2 AID.
LD must be assigned to controllers A and B to enable remote
replication.
IMPORTANT!
For systems operating in Windows® 2003 server, and in the event of single
controller failure, a logical drive is accessed via the host IDs managed by the alternate controller.
The host and port IDs do not failover to the remaining controller. In this case, MPIO driver is
necessary for path redundancy and controller failover.
