Microsoft ReFS – What’s new?

Hi! First, I took three weeks off around! Hope that everyone had a relaxing summer vacation and that you are ready to read new Blog posts! 🙂 As you know, while overall ReFS stability has much improved, there’s still one major issue with the ReFS driver memory management, which causes kernel memory usage to spike on large backup file deletions, sometimes causing server lockups. The workaround for this issue has been to throw lots of RAM at the backup repository server (1 GB RAM per 1 TB storage), which is obviously not ideal. Per Microsoft, this issue was resolved in the RS5 build (aka Windows Server 2019) quite a while ago, but initially, they did not plan to port it back to the RS1 build (aka Windows Server 2016) due to some significant complexities of this process.

New - Windows Server 2016

However, it looks like the support case pressure made them change their mind because during Anton Gostev regular status check with the ReFS team last week, something totally unexpected came up. Apparently, they have been working on backporting this and few other ReFS performance fixes to RS1 and the corresponding package is just around the corner! So be on a lookout for KB434884 in the next few days, this should be the update’s name. However, given that the update brings significant code changes, Anton would obviously advise against jumping it immediately unless your ReFS repositories are misbehaving anyway and waiting until we have had a chance to put it through its paces in our test labs first.


ReFS – Microsoft releases new stability fixes (KB4098787)

ReFS – Microsoft releases cumulative update 4077525!

Microsoft ReFS new driver version fixed all issues!

General Windows Server 2016 licensing information, including licensing criteria and terminology can be viewed here.

Here Windows Server 2016 datasheet: Download

Veeam B&R 9.5 U3 – New protection feature here!


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