Disk Manager reports incorrect disk usage a while after the operating system starts in Windows Server 2008 or in Windows Vista

Symptoms

On a computer that is running Windows Server 2008 or Windows Vista, Disk Manager may report incorrect disk usage a while after the operating system starts. The Disk Free Space value is reported to be larger than the total disk space.

For example, assume that you install a 900 GB (gigabyte) hard disk on a computer that is running Windows Server 2008. In this scenario, Disk Manager reports the correct disk usage after you restart the computer. However, Disk Manager reports an incorrect disk usage after a while. The incorrect disk usage may include a Disk Free Space value that is over 1500 GB.

Cause

This issue occurs because the NTFS file system incorrectly adjusts the amount of free disk space in the volume control block (VCB) when the clusters are allocated or deallocated.

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 one of the following operating systems:

  • Windows Vista Service Pack 1 (SP1)

  • Windows Vista Service Pack 2 (SP2)

  • Windows Server 2008

  • 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

To use the hotfix, you do not have to make any changes to the registry.

Restart requirement

You do not have to 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
    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. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.

  • 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 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.0.6002.22441

1,081,744

07-Jul-2010

23:39

x86

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

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.0.6002.22441

1,504,656

07-Jul-2010

23:35

x64

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

File name

File version

File size

Date

Time

Platform

Ntfs.sys

6.0.6002.22441

3,282,320

07-Jul-2010

23:31

IA-64

Workaround

To work around this issue, run the chkdsk command to check the disk space usage.

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 the incorrectly reported available space in the NTFS file system, view the following Microsoft Developer Network (MSDN) website:

General information about the incorrectly reported available space in the NTFS file systemFor 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 Vista and for Windows Server 2008

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

File name

Package_1_for_kb981891~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

2,427

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_2_for_kb981891~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

2,265

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_3_for_kb981891~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

2,265

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,693

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_client~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,430

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,689

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_sc~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,422

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,693

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_server~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not applicable

File size

1,430

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

X86_3960916b160d323802ac254df978dc89_31bf3856ad364e35_6.0.6002.22441_none_7d56b4dc892f9350.manifest

File version

Not applicable

File size

692

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

X86_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22441_none_a8b7046e334f0686.manifest

File version

Not applicable

File size

16,841

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

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

File name

Amd64_7277a67b77dcef7eb4bf1a7d92c89d7d_31bf3856ad364e35_6.0.6002.22441_none_b23dbf73b8c2ffc2.manifest

File version

Not applicable

File size

696

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Amd64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22441_none_04d59ff1ebac77bc.manifest

File version

Not applicable

File size

17,104

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_1_for_kb981891~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

2,445

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_2_for_kb981891~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

2,281

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_3_for_kb981891~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

2,281

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,705

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_client~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,438

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,701

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,430

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,705

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_for_kb981891_server~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not applicable

File size

1,438

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

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

File name

Ia64_4388a17a37d3877e6ba67108e73a14fe_31bf3856ad364e35_6.0.6002.22441_none_1df173c84c6ea39a.manifest

File version

Not applicable

File size

694

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Ia64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22441_none_a8b8a864334d0f82.manifest

File version

Not applicable

File size

17,096

Date (UTC)

07-Jul-2010

Time (UTC)

23:43

Platform

Not applicable

File name

Package_1_for_kb981891~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

2,107

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_2_for_kb981891~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

2,107

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

1,529

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

1,426

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

1,533

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

File name

Package_for_kb981891_server~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not applicable

File size

1,434

Date (UTC)

07-Jul-2010

Time (UTC)

23:42

Platform

Not applicable

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