This vSphere Upgrade Guide is updated with each release of the product or when necessary.

This table provides the update history of the vSphere Upgrade Guide.




Updated List of Preserved Configuration Components to mention the configurations that are not preserved for ESXi and ESX. Also specified that the ESX 3.x installation is mounted only for upgrades from ESX 3.x.

Removed information about VMX backup from Back Up the ESXi Host Configuration.

Updated information about location of upgrade log files in Postupgrade Considerations for Hosts.


Added cautionary wording to Upgrade to ESX 4.0 or ESXi 4.0 indicating that upgrades from ESX 3.x to ESX 4.x fail to replicate customized partitions.


Revised text in topics Upgrade ESX Hosts and Upgrade ESXi Hosts to say that the Host Update Utility can be used to upgrade ESX and ESXi hosts from version 3.x to version 4.0, rather than to version 4.x, as previously stated.


Renamed and clarified descriptions for various vCenter Server components in the section vCenter Server Upgrade Summary.

Added a reference regarding rollup jobs in relationship to detaching and attaching the vCenter Server database to a different Microsoft SQL Server in the section Detach and Attach a Microsoft SQL Server Database.

Added a sentence to indicate that vSphere Host Update Utility does not support authenticated proxies.

Added wording in various locations to indicate that upgrade to ESX 4.0 includes ESX 4.0 Update (or ESX 4.0 Update 1 and later).


Added information on upgrade from ESX 3.5 Update 5 in the section Upgrading Environments with Host Clusters.

Added note on upgrade from ESX 3.5 Update 5 in the section Upgrading Environments Without Host Clusters.

Changed support for ESX 3.0.0 and 3.0.1 to "Limited Support" in Table 10-2 in the section Upgrade support for ESX/ESXi.

Added section Upgrading from ESX 3.0.0 and 3.0.1.


Initial release.