I just added two LUNs to my ESX hosts, one 2tb and one 1.58tb the smaller LUN shows properly, the bigger one is detected at 0.00b in size.
Have I gone over the maximum in trying to add a 2 terabyte LUN? What is the maximum?
The maximum size is 2 TB (page 6 below). In some cases you need to specify a size less that 2048 GB for the LUN to be recognized.