Update for the CopyFile() function in nonbuffered scenarios in an SMB environment in Windows RT 8.1, Windows 8.1 and Windows Server 2012 R2

Applies to: Windows 8.1Windows 8.1 EnterpriseWindows 8.1 Pro

Symptoms


Assume that you have a computer that is running Windows RT 8.1, Windows 8.1 or Windows Server 2012 R2. You may experience certain issues when you directly or indirectly use the base CopyFile() function to copy files to a server message block (SMB) share that is hosted on a Windows Server 2012 R2-based clustered file server.

Note
The base CopyFile() function includes the Copy and Paste options in Windows Explorer, the Copy command in Command Prompt (cmd.exe), the Copy-Item cmdlet in Windows PowerShell, the File.Copy function in the Microsoft .NET Framework, the robocopy function, the xcopy function, and so on.

For example, you may experience the following issues:
  • When you try to copy a file that has non-sector-aligned file sizes between two folders that are hosted on the same cluster node, the copy operation fails.
  • When you pause a copy operation in Windows Explorer, you can't resume the operation.
This update fixes the issues that occur during these scenarios, and significantly improves performance.

Resolution


Update information

How to obtain this update

Windows Update
This update is available from Windows Update.
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
Operating systemUpdate
All supported x86-based versions of Windows 8.1Download Download the package now.
All supported x64-based versions of Windows 8.1Download Download the package now.
All supported x64-based versions of Windows Server 2012 R2Download Download the 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.

Prerequisites

To apply this update, you must be running Windows 8.1, Windows RT 8.1, or Windows Server 2012 R2.

Registry information

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

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

Status


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

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 8.1 and Windows Server 2012 R2

Additional files for Windows RT 8.1
File nameArm_6f9b889defcb16f2f1f3ef79a114a5ad_31bf3856ad364e35_6.3.9600.16496_none_059668fae335912f.manifest
File versionNot Applicable
File size698
Date (UTC)20-Dec-2013
Time (UTC)17:34
PlatformNot Applicable
File nameArm_microsoft-windows-kernelbase_31bf3856ad364e35_6.3.9600.16496_none_bb9be1c0d0311064.manifest
File versionNot Applicable
File size2,773
Date (UTC)20-Dec-2013
Time (UTC)06:11
PlatformNot Applicable
Additional files for all supported x86-based versions of Windows 8.1
File nameX86_963d57713277dcaa9392b2d69deb3969_31bf3856ad364e35_6.3.9600.16496_none_ed83d6cea22f07ed.manifest
File versionNot Applicable
File size698
Date (UTC)20-Dec-2013
Time (UTC)17:34
PlatformNot Applicable
File nameX86_microsoft-windows-kernelbase_31bf3856ad364e35_6.3.9600.16496_none_bb996f68d033f19e.manifest
File versionNot Applicable
File size2,773
Date (UTC)20-Dec-2013
Time (UTC)08:34
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
File nameAmd64_dbd44db78d160d3ce96bf72d0a852032_31bf3856ad364e35_6.3.9600.16496_none_c0fd9e7e2dea3821.manifest
File versionNot Applicable
File size1,046
Date (UTC)20-Dec-2013
Time (UTC)17:35
PlatformNot Applicable
File nameAmd64_microsoft-windows-kernelbase_31bf3856ad364e35_6.3.9600.16496_none_17b80aec889162d4.manifest
File versionNot Applicable
File size2,777
Date (UTC)20-Dec-2013
Time (UTC)10:29
PlatformNot Applicable
File nameWow64_microsoft-windows-kernelbase_31bf3856ad364e35_6.3.9600.16496_none_220cb53ebcf224cf.manifest
File versionNot Applicable
File size2,785
Date (UTC)20-Dec-2013
Time (UTC)08:34
PlatformNot Applicable