Thanks Amanzoor,
I am just setting this up so I also will go with the IBM version of ESXI, where did you download this from?
As far as I am aware I thought esxi 5.1 is the latest. Did you mean you went with Esxi 5 Update 1?
I just checked the IBM support page yesterday and it showed they support ESXI 5.1 on the DS3500 series.
I understand your frustration, hopefully there is some movement on this soon.