Iam planning to install VMware's vSphere Hypervisor (ESXi) on 4GB USB stick for the dell R710 for doing this when boot the server from the OpenManage installation utility on the Operating system section i can see the list of operating systems and at the bottom following VM ware options
VMware ESX 4.0 U3
VMware ESX 4.1 U1
VMware ESXi 4.0 U3 HDD
VMware ESXi 4.1 U1 HDD
Please suggest me which one i should select and continue. Thanks in advance.