OK to run vCenter 6.7, ESXi 6.7u1 and VMFS5?

Hi all, I appreciate your advice on a prior thread about upgrading my environment…

I’m reading the whitepapers for how to do the upgrade and the storage portion is where I’m concerned…

I have six VMFS5 datastores, which take up 100% of my storage array. I don’t have enough free space in any one datastore to migrate VMs to it to free up space.

Would leaving VMFS5 vs upgrading to VMFS6 be a deal breaker? Obviously I want everything to work properly, but would prefer to not rely on old tech/methods…


View Reddit by Phyber05View Source

Related Articles


  1. You won’t get any of the new features of VMFS6, but you shouldn’t have any problems with continuing with VMFS5.

    Do you provision everything as Thick or Thin? You could try a manual UNMAP on your datastores to see if you can free up any space that you may be unaware of.

    Also, in general you shouldn’t have your hosts newer than vCenter, so make sure vCenter is 6.7 U1 or later if your hosts will be on U1 as well.

  2. I mean, it’s not like VMFS5 is going to implode on you, it’s just missing the new features of VMFS6. It’s not going to break anything but it’s also not going to support the features like 4k drives, or have the doubled number of devices and paths.
    I’ve seen several environments that are running on older versions of VMFS that function just fine.

  3. Having VMFS 5 won’t be a problem with vcenter /esx 6.7.

    But please note that it is not supported to have an older vcenter managing a newer esxi. Hence you’ll want vcenter to also be 6.7u1.

    Not saying this won’t work but it might not – there was a case in the past where TLS 1.2 was enabled by default in an update release and having an esxi with the update but vcenter on an older update would just not connect) work.

Leave a Reply

Your email address will not be published. Required fields are marked *