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Article ID: 2525064 - Last Review: December 27, 2012 - Revision: 5.0

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Symptoms

On a computer that is running Windows Vista or Windows Server 2008, the Ntfs.sys driver takes a long time (several seconds or minutes) to mount a large volume.

This issue causes a delay in volume arrival and in volume mounting. Therefore, applications and services may be unable to access the volume.

Cause

During the volume mounting process, the Ntfs.sys driver reads the $Bitmap file to retrieve the number of free clusters in the current volume. If the file size of the $Bitmap file is large and the current cluster size is set to a small value such as the default cluster size, the Ntfs.sys driver requires a long time to read the file.

Note The file size of the $Bitmap file is large if the volume size is large.

Resolution

After you apply the following hotfix, the Ntfs.sys driver pre-fetches the subsequent pages of the $bitmap file to improve performance.

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 this specific problem.

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, submit a request to 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=support (http://support.microsoft.com/contactus/?ws=support)
Note 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  (http://support.microsoft.com/kb/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  (http://support.microsoft.com/kb/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.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 1 . 22xxxWindows Vista and Windows Server 2008SP1LDR
    6.0.600 2 . 22xxxWindows Vista and Windows Server 2008SP2LDR
  • 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.xxxxx 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 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
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.0.6001.228821,080,72018-Mar-201118:27x86
Ntfs.sys6.0.6002.226161,082,76818-Mar-201118:27x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.0.6001.228821,524,62418-Mar-201118:23x64
Ntfs.sys6.0.6002.226161,504,65618-Mar-201118:23x64
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.0.6001.228823,280,78418-Mar-201118:19IA-64
Ntfs.sys6.0.6002.226163,284,36818-Mar-201118:19IA-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  (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates
For more information about a similar issue that occurs in Windows Server 2003 SP2, click the following article number to view the article in the Microsoft Knowledge Base:
969352   (http://support.microsoft.com/kb/969352 / ) A long delay occurs when the Ntfs.sys driver tries to mount a large volume on a computer that is running Windows Server 2003 SP2

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
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size3,577
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameX86_823096f0f68e334906ab10e8687cc299_31bf3856ad364e35_6.0.6001.22882_none_fded961b7ea42418.manifest
File versionNot applicable
File size692
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameX86_df64e92869ebc72e2df7d14dacefb97e_31bf3856ad364e35_6.0.6002.22616_none_5ef6f08f89bdccf9.manifest
File versionNot applicable
File size692
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameX86_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6001.22882_none_a6a65506364837a4.manifest
File versionNot applicable
File size16,841
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameX86_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22616_none_a8dc797033322bb4.manifest
File versionNot applicable
File size16,841
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_2106a452ba4db4aebd2d13ac7ba5d762_31bf3856ad364e35_6.0.6002.22616_none_c2f64ae0f5824b4c.manifest
File versionNot applicable
File size696
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameAmd64_c8cf1ae46ba45bed62470fef4bdff0e3_31bf3856ad364e35_6.0.6001.22882_none_c43415b1c8a6d48e.manifest
File versionNot applicable
File size696
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameAmd64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6001.22882_none_02c4f089eea5a8da.manifest
File versionNot applicable
File size17,104
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameAmd64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22616_none_04fb14f3eb8f9cea.manifest
File versionNot applicable
File size17,104
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size3,605
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_55a5206aa84bbbc82e864824dcd223ff_31bf3856ad364e35_6.0.6002.22616_none_9ba5150a499d38b6.manifest
File versionNot applicable
File size694
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameIa64_78c8536102f5322b0efa1ac808147e96_31bf3856ad364e35_6.0.6001.22882_none_c7ca1dccc968fc86.manifest
File versionNot applicable
File size694
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameIa64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6001.22882_none_a6a7f8fc364640a0.manifest
File versionNot applicable
File size17,096
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameIa64_microsoft-windows-ntfs_31bf3856ad364e35_6.0.6002.22616_none_a8de1d66333034b0.manifest
File versionNot applicable
File size17,096
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,758
Date (UTC)18-Mar-2011
Time (UTC)18:40
PlatformNot applicable

Applies to
  • Windows Vista Starter
  • Windows Vista Home Premium
  • Windows Vista Home Basic
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Ultimate
  • Windows Server 2008 Standard
  • Windows Server 2008 Foundation
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Datacenter
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced KB2525064
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