If you have only one ESX server put ESX server in Maintenance Mode
• First upgrade vCenter server
• Next upgrade vSphere client to 4.0
• Next upgrade vCenter updage manager
• Next go to plugins click on VMware update manager extension click on download and install
• After installation of Plugins click on update manager from the Home page
• /or you can directly click on vSphere Host update utility 4.0 and add the hosts which you want to upgrade.
• Click on browse and select the ISO image for ESX4.0 and then click next
• Provide user name and password to connect the Host server
• Select the Disk and if you want you can increase the size of the disk
• Try to reboot the host and roll back the upgrade incase of failure
• you can see the log information that update signature is completed
• Click on Attach Baseline group and check the check box ESX4.0 Host upgrade click on attach.
• click on Remediation Selection and select Update Baseline click next and select task name
• Click immediately to complete the upgrade of ESX Host.
• Again click on update manager
• Select Baselines and groups and click on VMs/VAs
• Click on Create and give Name to the New Baseline group
• Select Virtual Machines and Virtual Appliances Baseline group.
• Select VM Hardware Update to Match Host.
• Click finish.
• Upgrade the virtual Hardware to all the VM's
• First upgrade vCenter server
• Next upgrade vSphere client to 4.0
• Next upgrade vCenter updage manager
• Next go to plugins click on VMware update manager extension click on download and install
• After installation of Plugins click on update manager from the Home page
• /or you can directly click on vSphere Host update utility 4.0 and add the hosts which you want to upgrade.
• Click on browse and select the ISO image for ESX4.0 and then click next
• Provide user name and password to connect the Host server
• Select the Disk and if you want you can increase the size of the disk
• Try to reboot the host and roll back the upgrade incase of failure
• you can see the log information that update signature is completed
• Click on Attach Baseline group and check the check box ESX4.0 Host upgrade click on attach.
• click on Remediation Selection and select Update Baseline click next and select task name
• Click immediately to complete the upgrade of ESX Host.
• Again click on update manager
• Select Baselines and groups and click on VMs/VAs
• Click on Create and give Name to the New Baseline group
• Select Virtual Machines and Virtual Appliances Baseline group.
• Select VM Hardware Update to Match Host.
• Click finish.
• Upgrade the virtual Hardware to all the VM's
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