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

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

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.

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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.

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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:

WDS TFTP Server: http://technet.microsoft.com/en-us/library/cc753134(WS.10).aspx
(http://technet.microsoft.com/en-us/library/cc726631(WS.10).aspx)
Network Boot Programs (NBP): http://technet.microsoft.com/en-us/library/cc753134(WS.10).aspx
(http://technet.microsoft.com/en-us/library/cc753134(WS.10).aspx)
How to Modify the BCD Store Using Bcdedit: http://technet.microsoft.com/en-us/library/cc731245(WS.10).aspx#BKMK_41
(http://technet.microsoft.com/en-us/library/cc731245(WS.10).aspx#BKMK_41)

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

(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

(http://support.microsoft.com/kb/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.
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Version Product SR_Level Service branch
6.0.600 1 . 22xxx Windows Vista and Windows Server 2008 SP1 LDR
6.0.600 2 . 22xxx Windows Vista and Windows Server 2008 SP2 LDR
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

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File name	File version	File size	Date	Time	Platform
Wdstftp.dll	6.0.6001.22550	58,880	27-Oct-2009	13:07	x86
Wdstftpctr.h	Not Applicable	397	01-Apr-2009	19:28	Not Applicable
Wdstftpctr.ini	Not Applicable	1,242	01-Apr-2009	19:28	Not Applicable
Wdstftp.dll	6.0.6002.22252	58,880	27-Oct-2009	12:53	x86
Wdstftpctr.h	Not Applicable	397	04-Apr-2009	05:52	Not Applicable
Wdstftpctr.ini	Not Applicable	1,242	04-Apr-2009	05:52	Not Applicable

For all supported x64-based versions of Windows Server 2008

Collapse this tableExpand this table

File name	File version	File size	Date	Time	Platform
Wdstftp.dll	6.0.6001.22550	72,192	27-Oct-2009	13:34	x64
Wdstftpctr.h	Not Applicable	397	01-Apr-2009	17:19	Not Applicable
Wdstftpctr.ini	Not Applicable	1,242	01-Apr-2009	17:19	Not Applicable
Wdstftp.dll	6.0.6002.22252	72,192	27-Oct-2009	13:06	x64
Wdstftpctr.h	Not Applicable	397	03-Apr-2009	21:27	Not Applicable
Wdstftpctr.ini	Not Applicable	1,242	03-Apr-2009	21:27	Not 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 name	File version	File size	Date	Time	Platform
Wdstftp.dll	6.1.7600.20753	385,536	13-Jul-2010	05:52	x64
Wdstftpctr.h	Not Applicable	397	10-Jun-2009	21:06	Not Applicable
Wdstftpctr.ini	Not Applicable	1,242	10-Jun-2009	21:06	Not 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

(http://support.microsoft.com/kb/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

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File name	Update.mum
File version	Not Applicable
File size	1,571
Date (UTC)	28-Oct-2009
Time (UTC)	05:15
Platform	Not Applicable

File name	X86_266e79daf58cca4a1d03aad6bcaaba42_31bf3856ad364e35_6.0.6002.22252_none_06d2962a8c672645.manifest
File version	Not Applicable
File size	719
Date (UTC)	28-Oct-2009
Time (UTC)	05:15
Platform	Not Applicable

File name	X86_5033c8264a640087a21f9592d39c55ae_31bf3856ad364e35_6.0.6001.22550_none_3bdb03824f917d72.manifest
File version	Not Applicable
File size	719
Date (UTC)	28-Oct-2009
Time (UTC)	05:15
Platform	Not Applicable

File name	X86_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6001.22550_none_167654194d323cbe.manifest
File version	Not Applicable
File size	15,046
Date (UTC)	27-Oct-2009
Time (UTC)	14:49
Platform	Not Applicable

File name	X86_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6002.22252_none_185ec6954a56c490.manifest
File version	Not Applicable
File size	15,046
Date (UTC)	27-Oct-2009
Time (UTC)	14:23
Platform	Not Applicable

Additional files for all supported x64-based versions of Windows Server 2008

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File name	Amd64_219c2205baa89160fde856e18e6a7633_31bf3856ad364e35_6.0.6001.22550_none_a73dccd94333bbc7.manifest
File version	Not Applicable
File size	723
Date (UTC)	28-Oct-2009
Time (UTC)	05:14
Platform	Not Applicable

File name	Amd64_ef20bb4e7e6ce1ec2a8028f9badc4f53_31bf3856ad364e35_6.0.6002.22252_none_30e1dd612aaf370b.manifest
File version	Not Applicable
File size	723
Date (UTC)	28-Oct-2009
Time (UTC)	05:14
Platform	Not Applicable

File name	Amd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6001.22550_none_7294ef9d058fadf4.manifest
File version	Not Applicable
File size	15,068
Date (UTC)	27-Oct-2009
Time (UTC)	15:17
Platform	Not Applicable

File name	Amd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.0.6002.22252_none_747d621902b435c6.manifest
File version	Not Applicable
File size	15,068
Date (UTC)	27-Oct-2009
Time (UTC)	14:34
Platform	Not Applicable

File name	Update.mum
File version	Not Applicable
File size	1,581
Date (UTC)	28-Oct-2009
Time (UTC)	05:14
Platform	Not 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 name	Amd64_e28c024cc734221fc536f08af3de9f10_31bf3856ad364e35_6.1.7600.20753_none_88d5e425cc155045.manifest
File version	Not Applicable
File size	723
Date (UTC)	13-Jul-2010
Time (UTC)	20:20
Platform	Not Applicable

File name	Amd64_microsoft-windows-d..ervices-tftp-server_31bf3856ad364e35_6.1.7600.20753_none_72bfc2a666a43408.manifest
File version	Not Applicable
File size	10,843
Date (UTC)	13-Jul-2010
Time (UTC)	06:42
Platform	Not Applicable

File name	Update.mum
File version	Not Applicable
File size	1,454
Date (UTC)	13-Jul-2010
Time (UTC)	20:20
Platform	Not Applicable