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....

refs

Storage

windows server

MikeLabatt
Jan 12, 2022
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.

Luc FULLENWARTH

Iron Contributor

Apr 17, 2023

Many thanks!
Disabling the hotplug in VMWare fixes the issue immediately
without the need of any reboot,
and even if updates are already installed.

For those wondering how to disable Hotplug: https://kb.vmware.com/s/article/1012225

NettlesTheGreat

Copper Contributor

Jul 08, 2023

Luc FULLENWARTH

Thanks for the link and for taking the time to reply here a year after the post. Sorting by date to find a more current fix (and stumbling upon the VM specific notes) saved my butt.

The online tech community is what actually keeps the world going around.

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ReFS volume appears RAW (version doesn't match expected value) after Windows Update