Of all the upgrades I have done to date, this was by far the easiest. Perhaps it was practice or even VMware vSphere’s time in market, but the upgrade to vSphere ESXi 5.1 from v4.1 and v5.0 went flawlessly.
vSphere upgrade saga: vSphere ESXi and Host Profiles
Edward L. Haletky, aka Texiwill, is an author, analyst, developer, technologist, and business owner. Edward owns AstroArch Consulting, Inc., providing virtualization, security, network consulting and development and TVP Strategy where he is also an Analyst. Edward is the Moderator and Host of the Virtualization Security Podcast as well as a guru and moderator for the VMware Communities Forums, providing answers to security and configuration questions. Edward is working on new books on Virtualization.