Symptoms

Consider the following scenario:

  • You have approximately 1,500 separate quota settings on a volume on a computer that is running Windows Server 2008.

  • You run an application that performs one of the following actions:

    • The application uses the FSCTL_LOCK_VOLUME control code to lock the volume in order to prevent it from being accessed by other processes.

    • The application uses the FSCTL_DISMOUNT_VOLUME control code to unmount the volume.

In this scenario, the application does not lock or unmount the volume.

Note This issue typically occurs when the application locks the volume with exclusive access. For example, the issue can occur when you use NEC ExpressCluster, because this application tries to lock the volume to prevent other processes from accessing the volume.

Cause

This issue occurs because the quota metadata file (Quota.md) becomes fragmented when there are too many quota settings on a volume. However, Quota.sys does not check this behavior.

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 website:

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 Server 2008 Service Pack 2 (SP2). 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 apply this hotfix, 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 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 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 maintaining the state of the updated component. 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

File name

File version

File size

Date

Time

Platform

Quota.sys

6.0.6002.22816

133,504

14-Mar-2012

17:21

x86

For all supported x64-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Quota.sys

6.0.6002.22816

160,640

14-Mar-2012

17:25

x64

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

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Additional file information

Additional file information for Windows Server 2008

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

File name

X86_ce329f1cf8cbf6b7234a64bc0de15016_31bf3856ad364e35_6.0.6002.22816_none_196835ea239ec3ed.manifest

File version

Not applicable

File size

704

Date (UTC)

14-Mar-2012

Time (UTC)

17:31

Platform

Not applicable

File name

X86_microsoft-windows-fsrm-quotadriver_31bf3856ad364e35_6.0.6002.22816_none_e9d43d0a90ff820a.manifest

File version

Not applicable

File size

11,233

Date (UTC)

14-Mar-2012

Time (UTC)

17:31

Platform

Not applicable

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

File name

Amd64_b14099c57a669a292ee64e6498ddad07_31bf3856ad364e35_6.0.6002.22816_none_c690832cdad462da.manifest

File version

Not applicable

File size

708

Date (UTC)

14-Mar-2012

Time (UTC)

17:31

Platform

Not applicable

File name

Amd64_microsoft-windows-fsrm-quotadriver_31bf3856ad364e35_6.0.6002.22816_none_45f2d88e495cf340.manifest

File version

Not applicable

File size

11,241

Date (UTC)

14-Mar-2012

Time (UTC)

17:31

Platform

Not applicable

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