Since August our DPM 2016 with latest UR2 and Modern Backup Storage (MBS) have a lot of issues. ReFS metafiles aggresively using server’s RAM so after 1 hour server become unresponsive, then I can’t RDP or WinRM. Other DPM server with MBS has no RAM issue, but backup tasks just slow, sometimes never completed. We also applied latest September CU KB4038801, but it didn’t help, increased the number of BSOD.
We have opened cases in Microsoft Premier Support, for DPM and Windows team. Now they are work together to provide us the final solution. Probably the workaround will be exclude MBS from operations and use normal DPM storage.
There are two forum’s topics regarding this issue:
Until now Microsoft couldn’t provide us the working solution. I will keep you updated.