2V0-620 · Question #57
What is true regarding datastores on ESXi 6.x?
The correct answer is A. NFS 4.1 datastore does not support Fault Tolerance (FT). In vSphere 6.x, NFS 4.1 datastores are explicitly unsupported for Fault Tolerance, while NFS 3 datastores do support FT.
Question
What is true regarding datastores on ESXi 6.x?
Options
- ANFS 4.1 datastore does not support Fault Tolerance (FT)
- BVMFS3 and VMFS5 datastores can be newly created
- CNFS datastore can be concurrently mounted using NFS 4.1 on one host and NFS on another
- DNFS 3.0 datastore does not support Fault Tolerance (FT)
How the community answered
(16 responses)- A88% (14)
- C6% (1)
- D6% (1)
Why each option
In vSphere 6.x, NFS 4.1 datastores are explicitly unsupported for Fault Tolerance, while NFS 3 datastores do support FT.
VMware explicitly excludes NFS 4.1 from the list of supported datastores for Fault Tolerance in vSphere 6.x. FT requires VMFS or NFS 3 datastores because NFS 4.1, despite its improvements like session trunking, is not certified for the continuous disk I/O replication that FT demands.
VMFS3 cannot be newly created in ESXi 6.x - only VMFS5 can be created fresh; VMFS3 volumes can only exist as upgrades carried over from older environments.
A single NFS datastore cannot be simultaneously mounted using different protocol versions across hosts - each NFS mount must use a single, consistent protocol version.
NFS 3.0 datastores do support Fault Tolerance in vSphere 6.x; it is NFS 4.1 that lacks FT support, so this statement is the inverse of the truth.
Concept tested: NFS 4.1 Fault Tolerance datastore support limitations
Source: https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.avail.doc/GUID-57929CF0-DA9B-407A-BF2E-E7B72708D825.html
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