- Start vSphere Client and login to your vCenter Server
- Home -> Datastores and Datastore Clusters
- Select a datastore -> Configuration Tab
- “Upgrade to VMFS-5…” link on the right side (See screen shot above)
Upgrading from VMFS-3 to VMFS-5 is an online & non-disruptive upgrade operation. You don’t even have to shut down VM’s. The maximum size of a VMDK on VMFS-5 is still 2TB.