Home > Storage > PowerStore > Virtualization and Cloud > Dell PowerStore: VMware vSphere Best Practices > Operating system disk formats
While most versions of VMFS are backwards-compatible, it is a best practice to verify and use the latest version of VMFS recommended by VMware. Typically, new VMFS versions are bundled with an ESXi upgrade. As a migration path, VMware vCenter allows administrators to use VMware vSphere Storage vMotion to migrate virtual machines to new VMFS datastores formatted with the latest version.