important steps to follow before upgrading vCenter


  • Make a full backup of the vCenter database.
  • Make sure that you have the following permissions:
  • Microsoft SQL:
    • Grant the System DSN user of the vCenter Database db_owner privileges on the vCenter database.
    • Grant the System DSN user of the vCenter Database db_owner privileges on the MSDB database.

      Note: The db_owner privileges on the MSDB database are required for installation and upgrade only.

  • Ensure that your ODBC System DSN is using the proper driver.

    Microsoft SQL must use the SQL Native Client driver.

  • Stop the vCenter service. This step is recommended, especially if the vCenter database is on a remote system.

    Click Start > Control Panel > Administrative Tools > Services > VMware VirtualCenter Server.

  • Log in to your vCenter Server with a Local Administrator account on your Windows system to run the upgrade.
  • Ensure no processes are running that conflict with the ports that vCenter uses.
  • Configure new vSphere 4.0 licences.
  • Reference:http://kb.vmware.com/kb/1009039 & Thanks to http://www.vladan.fr/vcp/

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