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ReFS volume appears RAW (version doesn't match expected value) after Windows Update
After Windows Update last night, Windows Server 2019 wouldn't mount a storage space volume as ReFS (it appears as RAW). The error in the ReFS event log is "ReFS failed to mount the volume. Version 1....
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.
Updated three Server 2019 Datacenter with direct attached ReFS Volumes (VMware) two days ago with the "fixed" updates. Two servers went fine. Third not. ReFS volume RAW. Uninstalled KB5010791 on this server. Took round about 20 minutes. After uninstall ReFS volume was OK again. Don't know what to say....
Edit:
On all three servers hotplug isn't disabled!
Will try to disable hotplug on the affected server next weekend and try to install update KB5010791 again.
But why the issue does not occure on the two other servers with hotplug enabled too?
