An administrator has upgraded to vSphere 6.5 and also wants to use Kerberos authentication for NFS. Which can be done to the existing NFSv3 volumes to enable this feature?

A storage rescan on VMFS volumes applies to block storage and has no effect on NFS datastore protocol versions or authentication mechanisms.

Kerberos security is a feature exclusive to NFSv4.1 in vSphere 6.5 and cannot be enabled on NFSv3 mounts; there is no in-place upgrade path, so the datastore must be unmounted as NFSv3 and then mounted again using the NFSv4.1 protocol with Kerberos authentication configured.

NFSv3 datastores are not automatically upgraded to NFSv4.1 during a vSphere upgrade; protocol version and authentication settings must be explicitly reconfigured by the administrator.

Scanning for new storage devices discovers block storage LUNs and does not change the protocol or authentication settings of existing NFS mounts.