Installation guide

Table 3-1. Upgrading vCenter Server Components (Continued)
Product Component Description
NOTE See the release
notes of the specific
vCenter Server
release to which you
are upgrading for
details on supported
upgrade paths.
VirtualCenter Server 2.0 Not supported
VirtualCenter Server 2.5 Upgrade by using the data migration tool to upgrade to vCenter
Server 4.1 on a different machine.
NOTE See the release notes of the specific vCenter Server release to
which you are upgrading for details on supported upgrade paths.
Starting with vCenter Server 4.1 Update 1, you cannot upgrade
vCenter Server from releases prior to VirtualCenter Server 2.5
Update 6.
vCenter Server 4.0 Upgrade in place if it is installed on a 64-bit system. If it is installed
on a 32-bit system, upgrade by using the data migration tool to
upgrade to vCenter Server 4.1 on a different machine.
NOTE See the release notes of the specific vCenter Server release to
which you are upgrading for details on supported upgrade paths.
vCenter Server 4.1 Install
vSphere Client 4.1 Install
Oracle database Verify that your database is supported. Upgrade if necessary.
Oracle 9i is no longer supported.
SQL database Verify that your database is supported. Upgrade if necessary.
Microsoft SQL Server 2000 is no longer supported.
Linked Mode Cannot join a Linked Mode group during the upgrade procedure.
Join after the upgrade to vCenter Server is complete.
License server License server To manage ESX 3.x/ESXi 3.5 hosts, verify that the vCenter Server
system is configured to use a license server. Install a license server
if necessary.
ESX ESX 2.5 host Not supported with vCenter Server 4.1. Supported with vCenter
Server 4.0, but cannot add the hosts to clusters.
VMFS2 volumes Supported as read-only (deprecated)
VM2 virtual machines Upgrade (optional)
VMDK2 virtual disk Not supported with vCenter Server 4.0
ESX MUI No change
VMware Tools Upgrade (optional)
ESX/ESXi 3.5 host Upgrade to ESX/ESXi 4.1 (optional)
ESX/ESXi 4.0 host Upgrade to ESX/ESXi 4.1 (optional)
ESX/ESXi 4.1 Install
VMFS3 volumes No change
VM3 virtual machines Upgrade to VM4 or VM7 (optional)
VMDK3 virtual disk Not supported with vCenter Server 4.1
vSphere Upgrade Guide
22 VMware, Inc.