Posted by: Nathan Simon
ESX, ESX Host, Host Update Ulitily, Maintenance Mode, update fails, vsphere, vSphere 4 Update 1
Okay so vSphere 4 Update one was released late last month, and some people went ahead and downloaded the ISO not knowing that vSphere Host Update Utility would fail to recognize the ISO as useful media. The simple answer is to update the vSphere Host Update Utility to its current version. Once that is done you can use the vSphere 4.0 Update 1 ISO, put the ESX host into Maintenance Mode and update the host from 3.x and up. Good Luck.