REFS destroyed by Windows Update on Windows Server 2016 RRS feed

  • Question

  • WTF!

    Last night we installed KB4565912, KB980830, KB4576750, KB4577015 (2020-09 Cumulative Update) on our Hyper-V Servers (Windows 2016).

    Last Cumulative Update was KB4537764 (2020-02)

    After Reboot all REFS Volumes were gone. Filesystems were RAW!

    We spent hours to restore the VMs. We switched back to NTFS on all Hyper-V Servers.

    That was by far the worst Update Bug ever!

    MS, send out a warning immediately! 

    Don't use REFS on any productive system.

    Monday, September 21, 2020 11:38 AM