If you use VMFS3 datastores, you must upgrade them to VMFS5.

You can perform an upgrade while the datastore is in use with virtual machines powered on.

If you have a VMFS2 datastore, you must first upgrade it to VMFS3 using an ESX/ESXi 3.x or ESX/ESXi 4.x host. Use the vSphere Host Client to access the host.

All hosts accessing the datastore must support VMFS5.

Verify that the volume to be upgraded has at least 2 MB of free space. Check the datastore Summary tab for this information.

1

In the vSphere Web Client navigator, select vCenter Inventory Lists > Datastores

2

Click the datastore to upgrade.

3

Click the Manage tab, and click Settings.

4

Click Upgrade to VMFS5.

5

Verify that the hosts accessing the datastore support VMFS5.

6

Click OK to start the upgrade.

7

Perform a rescan on all hosts that are associated with the datastore.

The datastore is upgraded to VMFS5 and is available to all hosts that are associated with the datastore.