File server becomes unresponsive when data deduplication is running in Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 EssentialsWindows Server 2012 R2 Foundation More


Assume that you are using Windows Server 2012 R2 as a Server Message Block (SMB) file server, and you have data deduplication enabled. After it operates for some time (typically several days), the SMB Service becomes unresponsive, and clients lose connections to the server.

When this issue occurs, the SMB server requires a manual restart for recovery.

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Known issues in update rollup 3161606

Running data deduplication on a Cluster Shared Volume (CSV) on Windows Server 2012 R2 based-Hyper V cluster may impact live migration where resource hosting subsystem (RHS) may deadlock and crash with 0x9E Stop error.

This issue occurs because of an incorrect status returned by data deduplication driver to the CSV file system causing a 0x9E Stop error.


To fix this issue, download and install July 2016 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (KB3172614).


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