I have successfully connected to an iSCSI target running on Windows Server 2012 from one ESX 5.1 box and created a datastore. Unfortnately, I can't get a second ESX 5.1 box to connect to the same iSCSI target. I have added the IP address of both ESX boxes as acceptable initiators for the Server 2012 target.
I have also successfully configured the iSCSI software adapter on the second ESX box to point to the target. It even found the IP address with a dynamic discovery.
Unfortunately, even after I set all this up I can't "Add Storage" under the "Storage" option in the Configuration tab for the ESX box. When I choose "Add Storage" no targets show up to choose from.
Is this simply a limit of ESX boxes, which only permits one ESX initiator per iSCSI target?
For what it's worth, I am using vCenter to manage my ESX boxes.