Operating system deployment over a network by using WDS fails in Windows Server 2008 and in Windows Server 2008 R2

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Article ID: 975710 - View products that this article applies to.
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SYMPTOMS

When you try to deploy an operating system over a network by using the Windows Deployment Service (WDS) on a server that is running Windows Server 2008 or Windows Server 2008 R2, the deployment fails.

CAUSE

This issue occurs because Windows Server 2008 and Windows Server 2008 R2 increased the TFTP block size from 512 bytes to 1,456 bytes. Because of this increase in TFTP block size, WDS cannot perform an operating system deployment over a network that has a TFTP block size of less than 1,456 bytes.

WDS in Windows Server 2008 and Windows Server 2008 R2 systems increase the default TFTP block size from 512 to 1,456 bytes to improve deployment performance. WDS also provides a method to customize the size of the TFTP block size in the BCD store. However, this method applies only to a part of the deployment process. You cannot customize this value in the deployment process before the customized value in the BCD store takes effect.

Because of this issue, if the TFTP block size is restricted to a smaller value on routers, the deployment fails.

RESOLUTION

This hotfix introduces a new registry subkey. This new subkey lets you customize the TFTP block size before the customized value in BCD store takes effect.

To resolve this issue, install this hotfix on the affected WDS servers that are running Windows Server 2008 or Windows Server 2008 R2. Then, customize the TFTP block size by creating the following registry value on each affected server:
MaximumBlockSize
This value has the following properties:

Location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\WDSServer\Providers\WDSTFTP

Name: MaximumBlockSize
Type: (REG_DWORD)
Value range: 512–1456
Base: (Decimal)


For more information about how to make these changes on each affected server, see the following TechNet articles:

Hotfix Information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:
  • Windows Server 2008
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows Server 2008 R2
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008

Restart Requirement

You do not have to restart the computer after you apply this hotfix package.

Hotfix Replacement Information

This hotfix package does not replace a previously released hotfix package.

File information

The English (United States) 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 Server 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" 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 Vista" 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 1 . 22xxxWindows Vista and Windows Server 2008SP1LDR
    6.0.600 2 . 22xxxWindows Vista and Windows Server 2008SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008.
  • 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 Server 2008" section. MUM files 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 Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Wdstftp.dll6.0.6001.2255058,88027-Oct-200913:07x86
Wdstftpctr.hNot Applicable39701-Apr-200919:28Not Applicable
Wdstftpctr.iniNot Applicable1,24201-Apr-200919:28Not Applicable
Wdstftp.dll6.0.6002.2225258,88027-Oct-200912:53x86
Wdstftpctr.hNot Applicable39704-Apr-200905:52Not Applicable
Wdstftpctr.iniNot Applicable1,24204-Apr-200905:52Not Applicable
For all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Wdstftp.dll6.0.6001.2255072,19227-Oct-200913:34x64
Wdstftpctr.hNot Applicable39701-Apr-200917:19Not Applicable
Wdstftpctr.iniNot Applicable1,24201-Apr-200917:19Not Applicable
Wdstftp.dll6.0.6002.2225272,19227-Oct-200913:06x64
Wdstftpctr.hNot Applicable39703-Apr-200921:27Not Applicable
Wdstftpctr.iniNot Applicable1,24203-Apr-200921:27Not Applicable
Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • 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 Server 2008 R2" 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 x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Wdstftp.dll6.1.7600.20753385,53613-Jul-201005:52x64
Wdstftpctr.hNot Applicable39710-Jun-200921:06Not Applicable
Wdstftpctr.iniNot Applicable1,24210-Jun-200921:06Not Applicable

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 Server 2008

Additional files for all supported x86-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot Applicable
File size1,571
Date (UTC)28-Oct-2009
Time (UTC)05:15
PlatformNot Applicable
File nameX86_266e79daf58cca4a1d03aad6bcaaba42_31bf3856ad364e35_6.0.6002.22252_none_06d2962a8c672645.manifest
File versionNot Applicable
File size719
Date (UTC)28-Oct-2009
Time (UTC)05:15
PlatformNot Applicable
File nameX86_5033c8264a640087a21f9592d39c55ae_31bf3856ad364e35_6.0.6001.22550_none_3bdb03824f917d72.manifest
File versionNot Applicable
File size719
Date (UTC)28-Oct-2009
Time (UTC)05:15
PlatformNot Applicable
File nameX86_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6001.22550_none_167654194d323cbe.manifest
File versionNot Applicable
File size15,046
Date (UTC)27-Oct-2009
Time (UTC)14:49
PlatformNot Applicable
File nameX86_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6002.22252_none_185ec6954a56c490.manifest
File versionNot Applicable
File size15,046
Date (UTC)27-Oct-2009
Time (UTC)14:23
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_219c2205baa89160fde856e18e6a7633_31bf3856ad364e35_6.0.6001.22550_none_a73dccd94333bbc7.manifest
File versionNot Applicable
File size723
Date (UTC)28-Oct-2009
Time (UTC)05:14
PlatformNot Applicable
File nameAmd64_ef20bb4e7e6ce1ec2a8028f9badc4f53_31bf3856ad364e35_6.0.6002.22252_none_30e1dd612aaf370b.manifest
File versionNot Applicable
File size723
Date (UTC)28-Oct-2009
Time (UTC)05:14
PlatformNot Applicable
File nameAmd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6001.22550_none_7294ef9d058fadf4.manifest
File versionNot Applicable
File size15,068
Date (UTC)27-Oct-2009
Time (UTC)15:17
PlatformNot Applicable
File nameAmd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6002.22252_none_747d621902b435c6.manifest
File versionNot Applicable
File size15,068
Date (UTC)27-Oct-2009
Time (UTC)14:34
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,581
Date (UTC)28-Oct-2009
Time (UTC)05:14
PlatformNot Applicable

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_e28c024cc734221fc536f08af3de9f10_31bf3856ad364e35_6.1.7600.20753_none_88d5e425cc155045.manifest
File versionNot Applicable
File size723
Date (UTC)13-Jul-2010
Time (UTC)20:20
PlatformNot Applicable
File nameAmd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.1.7600.20753_none_72bfc2a666a43408.manifest
File versionNot Applicable
File size10,843
Date (UTC)13-Jul-2010
Time (UTC)06:42
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,454
Date (UTC)13-Jul-2010
Time (UTC)20:20
PlatformNot Applicable

Properties

Article ID: 975710 - Last Review: October 7, 2011 - Revision: 5.0
APPLIES TO
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Service Pack 2
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
Keywords: 
kbexpertiseinter kbregistry kbsurveynew kbfix kbbug kbqfe KB975710

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