I have a similar issue with an Emulex LP10000-S
The volumes and LUN's were ok with ESXi4.1, but after upgrading to 5.x they aren-t visible anymore.
doing a scan command
~ # head /proc/scsi/lpfc820/3
Emulex LightPulse FC SCSI 8.2.4.141.55
Emulex LightPulse LP10000-S 2Gb PCI-X Fibre Channel Adapter on PCI bus 0000:22 device 08 irq 216
BoardNum: 0
ESX Adapter: vmhba2
Firmware Version: 1.92A1 (TS1.92A1)
Portname: 10:00:00:00:c9:55:99:66 Nodename: 20:00:00:00:c9:55:99:66
Link Down - Unknown
I think it's a driver issue that has unsupported setting by the FC card.