Important We recommend that you install KB 2710558 instead of or after installing KB 2495300 to avoid issues.

Symptoms

Consider the following scenario:

  • You have a computer that is running Windows Server 2008 or Windows Vista.

  • You query the value of the Avg. Disk sec/Transfer performance counter by using the RegQueryValueEx function.

In this scenario, the function may return a large invalid value.

Notes

  • This issue does not occur if you collect the value of the same performance counter by using the Performance Monitor utility.

  • This issue may occur if an application or service uses the sample code that is described on the following Microsoft Developer Network (MSDN) website:

    How to retrieve counter dataFor example, you use Microsoft System Center Operations Manager 2007 to monitor the health status of a computer that is running Windows Server 2008. In this scenario, you may receive the wrong alters for troubleshooting.

Cause

This issue occurs because of an error in the volume manager driver (Volmgr.sys).

Some applications or services close the handle to the HKEY_PERFORMANCE_DATA registry key after the RegQueryValueEx function is called. The kernel provider enables or disables the disk counter intermittently. However, the time stamps of some I/O request packets (IRPs) are not recorded when the disk counter is disabled. Therefore, the function calculates and returns some invalid data that does not have a time stamp.

Note In Windows Server 2008 or in Windows Vista, the disk counter in the kernel provider can be dynamically enabled or disabled. If the handle to the HKEY_PERFORMANCE_DATA registry key is closed, the kernel provider disables the I/O performance trace.

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 the problem described in this article. This hotfix might 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.

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, contact 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 Web site:

http://support.microsoft.com/contactus/?ws=supportNote 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 Vista Service Pack 2 (SP2) or Windows Server 2008 Service Pack 2 (SP2).

For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

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

Registry information

To use the hotfix in this package, 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 Vista and 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.

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    2.
    22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • 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 and for Windows Vista" 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 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Agp440.sys

6.0.6002.22570

53,136

13-Jan-2011

22:10

x86

Amdagp.sys

6.0.6002.22570

54,160

13-Jan-2011

22:10

x86

Isapnp.sys

6.0.6002.22570

46,480

13-Jan-2011

22:10

x86

Msisadrv.sys

6.0.6002.22570

13,200

13-Jan-2011

22:10

x86

Mssmbios.sys

6.0.6002.22570

28,048

13-Jan-2011

22:10

x86

Nv_agp.sys

6.0.6002.22570

105,872

13-Jan-2011

22:10

x86

Pci.sys

6.0.6002.22570

148,880

13-Jan-2011

22:10

x86

Rdpdr.sys

6.0.6002.22570

250,368

13-Jan-2011

14:12

x86

Sisagp.sys

6.0.6002.22570

52,624

13-Jan-2011

22:10

x86

Streamci.dll

6.0.6002.22570

21,904

13-Jan-2011

22:10

x86

Swenum.sys

6.0.6002.22570

12,048

13-Jan-2011

22:10

Not applicable

Termdd.sys

6.0.6002.22570

51,600

13-Jan-2011

22:10

x86

Uliagpkx.sys

6.0.6002.22570

57,744

13-Jan-2011

22:10

x86

Viaagp.sys

6.0.6002.22570

53,648

13-Jan-2011

22:10

x86

Volmgr.sys

6.0.6002.22570

49,552

13-Jan-2011

22:10

x86

For all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Agp440.sys

6.0.6002.22570

61,328

13-Jan-2011

22:05

x64

Isapnp.sys

6.0.6002.22570

20,368

13-Jan-2011

22:05

x64

Msisadrv.sys

6.0.6002.22570

14,736

13-Jan-2011

22:05

x64

Mssmbios.sys

6.0.6002.22570

31,632

13-Jan-2011

22:05

x64

Nv_agp.sys

6.0.6002.22570

123,280

13-Jan-2011

22:05

x64

Pci.sys

6.0.6002.22570

178,576

13-Jan-2011

22:05

x64

Rdpdr.sys

6.0.6002.22570

315,904

13-Jan-2011

14:34

x64

Streamci.dll

6.0.6002.22570

23,440

13-Jan-2011

22:05

x64

Swenum.sys

6.0.6002.22570

12,304

13-Jan-2011

22:05

x64

Termdd.sys

6.0.6002.22570

60,816

13-Jan-2011

22:05

x64

Uliagpkx.sys

6.0.6002.22570

64,912

13-Jan-2011

22:05

x64

Volmgr.sys

6.0.6002.22570

63,376

13-Jan-2011

22:05

x64

For all supported IA-64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Agp460.sys

6.0.6002.22570

136,704

13-Jan-2011

13:31

IA-64

Isapnp.sys

6.0.6002.22570

34,192

13-Jan-2011

22:02

IA-64

Msisadrv.sys

6.0.6002.22570

21,904

13-Jan-2011

22:02

IA-64

Mssmbios.sys

6.0.6002.22570

54,160

13-Jan-2011

22:02

IA-64

Pci.sys

6.0.6002.22570

441,232

13-Jan-2011

22:02

IA-64

Rdpdr.sys

6.0.6002.22570

711,680

13-Jan-2011

14:15

IA-64

Streamci.dll

6.0.6002.22570

42,896

13-Jan-2011

22:02

IA-64

Swenum.sys

6.0.6002.22570

16,016

13-Jan-2011

22:02

Not applicable

Termdd.sys

6.0.6002.22570

156,560

13-Jan-2011

22:02

IA-64

Volmgr.sys

6.0.6002.22570

145,808

13-Jan-2011

22:02

IA-64

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

For more information about the RegQueryValueEx function, visit the following Microsoft Developer Network (MSDN) website:

General information about the RegQueryValueEx functionFor more information about how to retrieve counter data, visit the following MSDN website:

How to retrieve counter data For more information about a similar issue in Windows 7 or in Windows Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:

2470949 The RegQueryValueEx function returns a very large invalid value of the performance counter "Avg. Disk sec/Transfer" in Windows Server 2008 R2 or in Windows 7

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008

File name

Update.mum

File version

Not applicable

File size

3,078

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

File name

X86_machine.inf_31bf3856ad364e35_6.0.6002.22570_none_bc3759c4d52d7e10.manifest

File version

Not applicable

File size

9,974

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

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

File name

Amd64_machine.inf_31bf3856ad364e35_6.0.6002.22570_none_1855f5488d8aef46.manifest

File version

Not applicable

File size

8,242

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,102

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008

File name

Ia64_machine.inf_31bf3856ad364e35_6.0.6002.22570_none_bc38fdbad52b870c.manifest

File version

Not applicable

File size

7,081

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,255

Date (UTC)

13-Jan-2011

Time (UTC)

22:16

Platform

Not applicable

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×