This article describes an issue that occurs when you copy large files to clustered shared volumes (CSV) storage on Windows Server 2012 R2-based scale-out file servers. A hotfix is available to fix this issue. Before you install this hotfix, see theĀ Prerequisites section.


This issue occurs when the following conditions are true:

  • Scale-out file servers have more than 64 gigabytes (GB) of physical memory installed.

  • Scale-out file servers are set to use CSV storage.

  • The CSV cache is enabled, and the cache size is set to 64 GB or larger.

When this issue occurs, you receive the following error message:



To fix this issue, install MS15-115: Description of the security update for Windows: November 10, 2015.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


See the terminology that Microsoft uses to describe software updates.

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