Files are corrupted on deduplicated volumes that were created as NTFS-compressed in Windows Server 2012 R2

This article describes an issue that occurs if you enable data deduplication on an NTFS compressed volume in Windows Server 2012 R2. You can fix this issue by using the update in this article. Before you install this update, see the Prerequisites section.
Users can no longer open files on a deduplication-enabled volume that's created with NTFS compression enabled at the root of the volume. Additionally, the corrupted files can no longer be recovered.
This issue occurs because deduplication metadata that's stored on the compressed volume root becomes corrupted when a process writes in-place to a file on the deduplicated volume. The deduplication metadata that is stored on the compressed volume root is located under the System Volume Information (SVI) folder.

How to get this update
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as a Recommended update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The update is available for download from the Microsoft Download Center:

DownloadDownload the Windows Server 2012 R2 package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information


To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update doesn't replace a previously released update.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.
File Information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows Server 2012 R2

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    VersionProductMilestoneService branch
    6.3.960 0.18 xxxWindows Server 2012 R2RTMGDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
x64 Windows 8.1 and Windows Server 2012 R2
File nameFile versionFile sizeDateTimePlatform
Dedupfilemetadata.cdxmlNot applicable1,44618-Jun-201315:13Not applicable
Dedupjob.cdxmlNot applicable8,85119-Aug-201422:13Not applicable
Deduplication.format.ps1xmlNot applicable29,98718-Jun-201315:13Not applicable
Deduplication.psd1Not applicable1,24118-Jun-201315:13Not applicable
Deduplication.types.ps1xmlNot applicable5,45918-Jun-201315:13Not applicable
Deduplicationprovider.mofNot applicable18,03018-Jun-201315:13Not applicable
Dedupmetadata.cdxmlNot applicable1,07518-Jun-201315:13Not applicable
Dedupschedule.cdxmlNot applicable12,54718-Jun-201315:13Not applicable
Dedupstatus.cdxmlNot applicable2,23818-Jun-201315:13Not applicable
Dedupvolume.cdxmlNot applicable9,55218-Jun-201315:13Not applicable

Additional file information

x64 Windows Server 2012 R2
File propertyValue
File nameAmd64_f1539348a650aaa119941dc140677bb0_31bf3856ad364e35_6.3.9600.18205_none_66819715cc8c5670.manifest
File versionNot applicable
File size705
Date (UTC)22-Jan-2016
Time (UTC)20:23
PlatformNot applicable
File nameAmd64_microsoft-windows-dedup-service_31bf3856ad364e35_6.3.9600.18205_none_c01009053d29d4d6.manifest
File versionNot applicable
File size26,307
Date (UTC)22-Jan-2016
Time (UTC)08:11
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,575
Date (UTC)22-Jan-2016
Time (UTC)20:23
PlatformNot applicable

Article ID: 3137923 - Last Review: 04/12/2016 20:25:00 - Revision: 2.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation

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