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.
I can confirm - this worked for me too. Followed this, adding devices.hotplug and a value of false. to our VM configurations in VMWare:
https://kb.vmware.com/s/article/1012225
17 Windows 2019 servers with ReFS volumes. All now updated through latest windows updates and stable.
MicrosoftThe main issue is there are various versions of REFS
ReFS v1 as used on Server 2012R2 and ReFS v3 used on later OS's
The Updated fix, for Refs on removable drives, only addresses the ReFS v3 case and does not (and never will) address the refsv1 case.
Note that some disks, even on later OS's might be using ReFS v1 if they were originally set up on earlier systems
And so the fix will not help on those disks on those systems
Since its mainly VMWare VM's that are affected, as they consider hotplug disks as removable, suggest using the vmware devices.hotplug solution described earlier
You can check the Refs version with
fsutil fsinfo refsinfo x:
(although cant do this if the drive is currently showing as RAW)