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Offloaded Data Transfers fail on a computer that is running Windows 8 or Windows Server 2012

View products that this article applies to.

Symptoms

Important The hotfix that corresponds to KB 2796995 has been included with the hotfix KB 2848344, which contains all fixes that were previously included in KB 2796995.

Consider the following scenario:
  • You create two Logic Unit Numbers (LUNs) on a third-party storage device.
  • You connect a computer that is running Windows 8 or Windows Server 2012 to the third-party storage device.
  • You assign the LUNs to the computer.
  • You copy a large amount of data by using the third-party storage device.
  • Then you use the Offloaded Data Transfers (ODX) feature to copy files from one LUN to another LUN.
In this scenario, the copy operation freezes at 99 percent.

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Cause

This issue occurs because the copy engine incorrectly initializes regular copy chunks. Therefore, the copy engine restarts the entire copy process for the file when nonzero bytes are copied through the ODX. When the copy engine restarts, the destination file size is incorrectly set if all the following conditions are true:
  • The copy type is noncached.
  • Nonzero bytes are copied through the ODX.
  • The file size is not aligned to a sector boundary.
Note The expected behavior is that when nonzero bytes are copied through an ODX copy, the copy engine restarts a regular copy from where the ODX copy failed.

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Resolution

Hotfix information


A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows 8 or Windows Server 2012.

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.
File information
The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 8 and Windows Server 2012 file information notes
Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • 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
    6.2.920 0.20 xxxWindows 8 and Windows Server 2012RTMLDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 8 and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely 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.
For all supported x86-based versions of Windows 8

File nameFile versionFile sizeDateTimePlatform
Kernelbase.dll6.2.9200.20596758,78402-Jan-201323:31x86

For all supported x64-based versions of Windows 8 and of Windows Server 2012
File nameFile versionFile sizeDateTimePlatform
Csvfs.sys6.2.9200.20596623,61601-Jan-201303:58x64
Kernelbase.dll6.2.9200.20596976,38402-Jan-201323:29x64
Kernelbase.dll6.2.9200.20596666,11201-Jan-201303:53x86

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Status

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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
Additional file information

Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8
File nameX86_microsoft-windows-kernelbase_31bf3856ad364e35_6.2.9200.20597_none_242f53d79f1dda42.manifest
File versionNot applicable
File size2,773
Date (UTC)03-Jan-2013
Time (UTC)00:04
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012
File nameAmd64_microsoft-windows-f..rcluster-csvfs-core_31bf3856ad364e35_6.2.9200.20597_none_2f824d4702550320.manifest
File versionNot applicable
File size3,087
Date (UTC)03-Jan-2013
Time (UTC)01:54
PlatformNot applicable
File nameAmd64_microsoft-windows-kernelbase_31bf3856ad364e35_6.2.9200.20597_none_804def5b577b4b78.manifest
File versionNot applicable
File size2,777
Date (UTC)03-Jan-2013
Time (UTC)01:26
PlatformNot applicable
File nameWow64_microsoft-windows-kernelbase_31bf3856ad364e35_6.2.9200.20597_none_8aa299ad8bdc0d73.manifest
File versionNot applicable
File size2,785
Date (UTC)03-Jan-2013
Time (UTC)00:03
PlatformNot applicable

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Keywords: kb, kbautohotfix, kbqfe, kbhotfixserver, kbfix, kbexpertiseadvanced, kbexpertisebeginner, kbsurveynew

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Article Info
Article ID : 2796995
Revision : 1
Created on : 1/7/2017
Published on : 6/13/2013
Exists online : False
Views : 265