Forum Discussion
ReFS volume appears RAW (version doesn't match expected value) after Windows Update
I solved this by uninstalling KB5009557. The ReFS volume came back working as it should, instead of appearing as RAW.
Update: since even the February 2022 Windows Update bricks ReFS in the same way, and hints from Microsoft are that ReFS 1.x is no longer supported, we copied everything to new disks, upgrading ReFS from 1.2 to 3.4 in the process. Such a (manual) ReFS upgrade should be the solution that everyone needs, allowing to re-enable Windows Update.
"Is there a way to upgrade REFS to a version that is supported by the patch? "
Any in-place upgrade (starting from Windows Server 2016) will upgrade all attached write-able disks to the latest ReFS Version without formatting or data loss. However, the Exchange Team do not support in-place upgrades of the OS. This is certainly due to the dependencies of .net / PowerShell that would change. Also, IIS services, but the latter often upgrade well.
If you would like to prevent the upgrade set the drive to read-only via PowerShell or diskpart.
This can be needed if you are just testing the upgrade and would like to revert. Once upgraded you cannot downgrade. Also, there is no tool (afaik) to execute a manual upgrade without reformatting.
MicrosoftIf you mean v1.2 to v3.x then no. Only option would be to create a new disk, format refs (which will be v3.x) and copy data over (with Exchange or anything using the volume tempoarily off)(or maybe Exchange has a way to move/migrate data to a new drive whilst it all live).
Note you will only be using refs v1.2 if the data disks were originally created by Server 2012/2012R2.
If you are already on refs v3.x then Im not sure I understand the question