I have 2 esx hosts and vcenter running and have recently configure and connected a dell md3200 san. From the screen shots attached you will see that I have 3 LUN's setup DISK1 DISK 2 and SQL. On one host all 3 show up with no issues and are able to be connected to and used for virtual machines. The other host only DISK2 and SQL show up. On the host where DISK1 is not showing up under summary you can see the disk in Configuration the only difference I see is that when you click the LUN below there is no VMFS partition on that host but it does show up on the other host. Please let me know if you have any thoughts or if you need any more clarification. In the md3200 all LUNS are mapped to both hosts and show up without issues.