An administrator is upgrading an ESXi 3.5 host to ESXi 5.x. The host has a single Intel Xeon processor, 4GB of RAM, and a VMFS datastore on a private, SAN-attached LUN.
What might cause the upgrade to be unsuccessful?
The ESXi host has 4GB RAM.
The ESXi host has one processor.
ESXi 3.5 is not supported for direct upgrade.
The VMFS datastore resides on a private, SAN-attached LUN.