The reason I ask about the drivers ..
When I installed ESXi 5.1 on the Dell PE R510, it failed with I think was a driver issue.
I had to download a special ESXi Image from the Dell Web Site.
I am hoping this is corrected in ESXi 5.5? and,
when applying the patch for HeartBleed, I will use excli "update" instead of "install"
Stan