Hi

Well i don't think having two HBA with the correspondent software to do load balancing as well as failover is a bad thing. In fact is one of the best practices you can use to set a very secure and fast system.

it's all about the storage subsystem you have. IBM FastT (or DS4x) line has the RDAC driver that's not help too much in load balancing (you do the load balancing at Storage Manager level) but does a good job in failover. IBM DS8x series uses SDD (and SDDPCM) and they do load balancing and failover. SDD comes from the old days of the Shark systems and works ok.

EMC2 uses Powerpath, a very mature SW. HP uses AutoPath, not a very good SW.

Hope this helps