A vSphere administrator wants to upgrade NFS3 datastores to NFS4.1 on ESXi 6.5 hosts with running
production virtual machines.Which option is valid?
A.
Run ESXi command to upgrade the datastore.
B.
Unmount the datastore from a single host, then mount it as NFS 4.1 datastore, and repeat this one host at a
time until the mount has been upgraded on all hosts.
C.
Create a new NFS 4.1 datastore, and then use Storage vMotion to migrate virtual machines from the old
datastore to the new one.
D.
Right click the datastore and upgrade it as a NFS 4.1 datastore.
Explanation:
https://pubs.vmware.com/vsphere-60/index.jsp?topic=%2Fcom.vmware.vsphere.storage.doc%
2FGUID-8A929FE4-1207-4CC5-A086-7016D73C328F.html (NFS version upgrades)
Correct: C
C is correct. Be aware of the wording of B, which could be right if no other host is connected via NFS3-Client.
Source: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.storage.doc/GUID-8A929FE4-1207-4CC5-A086-7016D73C328F.html
NFS Upgrades
When you upgrade ESXi to version 6.5, existing NFS 4.1 datastores automatically begin supporting functionalities that were not available in the previous ESXi release. These functionalities include Virtual Volumes, hardware acceleration, and so on.
ESXi does not support automatic datastore conversions from NFS version 3 to NFS 4.1.
If you want to upgrade your NFS 3 datastore, the following options are available:
Create the NFS 4.1 datastore, and then use Storage vMotion to migrate virtual machines from the old datastore to the new one.
Use conversion methods provided by your NFS storage server. For more information, contact your storage vendor.
Unmount the NFS 3 datastore, and then mount as NFS 4.1 datastore.
Caution:
If you use this option, make sure to unmount the datastore from all hosts that have access to the datastore. The datastore can never be mounted by using both protocols at the same time.