...I understand that the 5.5 has multi lun support in the stock kernel...so, maybe a look-see in the /boot/config[number-number] to look for somethng hinting to multi and/or lun, and see what it's set to?
I hope iSCSI is installed, but, hey, you know this...
My SAN experience is somewhat scetchy, I may not be able to help...that's the main reason I may not have understood where you wanted to go...
But, I'm willing to learn from ANYone hopping on...
Thor