VMware vSphere 4 Installation Guide download pdf (Page 75)

What to do next

See Chapter 12, “Postupgrade Considerations for Hosts,” on page 77.

Upgrade ESXi Hosts

You can use vSphere Host Update Utility to upgrade ESXi 3.5 hosts to ESXi 4.0.

vSphere Host Update Utility is meant for small deployments in which a host is being managed by a single

administrator. For example, the following scenario is not supported: Admin 1 starts to upgrade host1 using

vSphere Host Update Utility. Admin 2 starts the vSphere Host Update Utility, sees that host1 is running ESXi

3.5, and tries to upgrade the host. The vSphere Host Update Utility does not report that an upgrade is already

in progress.

VMware supports and recommends that you perform one upgrade at a time when you use vSphere Host

Update Utility. If you do upgrade multiple hosts simultaneously and the upgrade fails for one of the hosts,

you must close and restart vSphere Host Update Utility to retry the upgrade on the host that failed. In this

case, you must wait until the upgrade for all the hosts is complete before you restart the utility. For simplicity,

it is best practice to upgrade one host at a time.

IMPORTANT For large deployments and for environments with clustered hosts, VMware recommends that you

use vCenter Update Manager instead of vSphere Host Update Utility.

When you upgrade a host, no third-party management agents or third-party software applications are

migrated to the ESX 4.0/ESXi 4.0 host.

Prerequisites

Prepare the host before you upgrade it.

See “ESX Hardware Requirements,” on page 27 and “Recommendations for Enhanced ESX

Performance,” on page 29.

Make sure you are logged in to an account that has administrator permissions on your computer.

Procedure

1 Download an ESXi 4.0 ZIP file and save it on the same Windows computer on which vSphere Host Update

Utility is installed.

2 Use the vSphere Client to put the host into maintenance mode.

3 Select Start > Programs > VMware > vSphere Host Update Utility 4.0.

4 Select a host from the list and click Upgrade.

If a host is not in the list, you can add it by selecting Host > Add Host.

5 Type the location of the ESXi 4.0 upgrade file to use or click Browse to select the location from a file browser

and click Next.

For ESXi 4.0, the installation file is a ZIP file.

6 Select I accept the terms in the license agreement and click Next.

7 Type the administrative account information for the selected host and click Next.

The software performs a host compatibility check.

8 Click Finish.

The host upgrade begins. You can view the upgrade progress in the Host Details pane.

When an upgrade is in progress, do not exit vSphere Host Update Utility.

Chapter 11 Upgrade to ESX 4.0 or ESXi 4.0

VMware, Inc. 75

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VMware vSphere 4 Installation Guide Page 75