Microsoft KB Archive/936008

= Volume GUIDs become invalid in Windows Server 2003 when the disk layout changes outside the context of the Virtual Disk Service and of the APIs =

Article ID: 936008

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
Consider the following scenario. In Windows Server 2003, you use a custom application that uses the Virtual Disk Service (VDS). The application changes the volume globally unique identifiers (GUIDs) outside the context of the VDS and of the APIs. The volume GUIDs are stored in the VDS cache. In this scenario, the GUIDs become invalid.

When this problem occurs, you may receive an error message that resembles the following, depending on the application that is being used:

Inconsistency between the system and Virtual Disk Service has been found due to disk signature change for disk 

Please restart Virtual Disk Service.



CAUSE
This problem occurs because of a bug in the VDS. This problem occurs when the VDS is not involved in a disk layout change or when the VDS is not notified of a disk layout change. When this problem occurs, even the Reenumerate method and the Refresh method do not update the cache correctly. Therefore, a call to the IVdsDisk::GetProperties method returns the previous disk GUID, and this GUID is no longer valid. If the VDS is restarted, the volume information is updated correctly. However, if you stop the VDS while the service is in this state, the service may crash.



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 Windows Server 2003 service pack 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, the computer must be running one of the following operating systems:
 * A 32-bit version of Windows Server 2003 with Service Pack 1 (SP1) or with Service Pack 2 (SP2)
 * An Itanium-based version of Windows Server 2003 with SP1 or with SP2
 * An x64-based version of Windows Server 2003

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 English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003, Itanium-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New file naming schema for Microsoft Windows software update packages

For more information, 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

Technical support for x64-based versions of Microsoft Windows
If your hardware came with a Microsoft Windows x64 edition already installed, your hardware manufacturer provides technical support and assistance for the Windows x64 edition. In this case, your hardware manufacturer provides support because a Windows x64 edition was included with your hardware. Your hardware manufacturer might have customized the Windows x64 edition installation by using unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with a Windows x64 edition. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware. If you purchased a Windows x64 edition such as a Microsoft Windows Server 2003 x64 edition separately, contact Microsoft for technical support.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:

http://www.microsoft.com/windowsxp/64bit/default.mspx

For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site:

http://www.microsoft.com/windowsserver2003/64bit/x64/default.mspx

Additional query words: Winx64 Windowsx64 64bit 64-bit

Keywords: kbbug kbfix kbqfe kbprb kbexpertiseadvanced kbhotfixserver kbwinserv2003postsp2fix KB936008

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