Article ID: 2885209 - View products that this article applies to.
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Symptoms

Assume that you have a file server that is running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. The cluster size (also known as the allocation unit size) for an NTFS volume is larger than 4 kilobytes (KB). In this situation, the following event is logged in the System log:

Log Name: System
Event Type: Error
Event Source: NTFS
Event ID: 55
Description: The file system structure on disk is corrupt and unusable. Please run the chkdsk utility on the volume "Drive_letter:"

Cause

This issue occurs because the BITMAP attribute of the NTFS metafile cannot roll back when an exception is raised after you modify the metafile. When the system tries to extend the BITMAP attribute, there is no transaction in progress, and the attribute snapshots are purged before the system starts to process the exception.

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=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 Windows 7 SP1 or Windows Server 2008 R2 SP1.

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

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

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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 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" 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:
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    VersionProductMilestoneService branch
    6.1.760 1.18xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • 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 7 and for Windows Server 2008 R2" section. MUM 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 7
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File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.1.7601.183971,212,35214-Feb-201402:08x86
Ntfs.sys6.1.7601.226021,213,37613-Feb-201402:11x86
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For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.1.7601.183971,684,92814-Feb-201402:29x64
Ntfs.sys6.1.7601.226021,684,41613-Feb-201402:39x64
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For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Ntfs.sys6.1.7601.183973,548,60814-Feb-201401:51IA-64
Ntfs.sys6.1.7601.226023,554,24013-Feb-201401:53IA-64
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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More information

Usually, event ID 55 is logged when file system corruption occurs. The file system corruption occurs when one or more of the following issues occur:
  • A disk has bad sectors.
  • I/O requests that are delivered by the file system to the disk subsystem are not completed successfully.
For the issue that is described in this article, event ID 55 is logged because the I/O requests are not completed successfully. When this issue happens, the bitmap information that manages file records proves to be inconsistent. Therefore, the user can’t find the file and folder properties. In this situation, the file index experiences an inconsistency, but in fact there is no file corruption. However, because of the logged event, it may seem like file corruption has occurred.

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

Additional file information

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Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
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File propertyValue
File nameUpdate.mum
File versionNot applicable
File size2,138
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameX86_3f7cc3a24c30d2e673c340e361b93f2f_31bf3856ad364e35_6.1.7601.18397_none_07dc2437c0fbe8ae.manifest
File versionNot applicable
File size692
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameX86_7792928346a8f26cb81f83b3d2312aee_31bf3856ad364e35_6.1.7601.22602_none_53af81e470fbe949.manifest
File versionNot applicable
File size692
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameX86_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.18397_none_a824fa927b6bfd7e.manifest
File versionNot applicable
File size14,508
Date (UTC)14-Feb-2014
Time (UTC)02:32
PlatformNot applicable
File nameX86_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.22602_none_a90ae90394451d6a.manifest
File versionNot applicable
File size14,508
Date (UTC)13-Feb-2014
Time (UTC)02:34
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File propertyValue
File nameAmd64_4b0c9bce6885d53fda4773c4f7e2554b_31bf3856ad364e35_6.1.7601.22602_none_f6e942c3407435ec.manifest
File versionNot applicable
File size696
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameAmd64_78bb574ac84b57e4c2da771e272cbff5_31bf3856ad364e35_6.1.7601.18397_none_3f4c0fe7020b621d.manifest
File versionNot applicable
File size696
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameAmd64_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.18397_none_0443961633c96eb4.manifest
File versionNot applicable
File size14,514
Date (UTC)14-Feb-2014
Time (UTC)02:52
PlatformNot applicable
File nameAmd64_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.22602_none_052984874ca28ea0.manifest
File versionNot applicable
File size14,514
Date (UTC)13-Feb-2014
Time (UTC)03:02
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,352
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
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Additional files for all supported IA-64-based versions of Windows Server 2008 R2
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File propertyValue
File nameIa64_9af650c2bfd2ba56ba7e2055503f7e42_31bf3856ad364e35_6.1.7601.18397_none_73aeec346d7cc839.manifest
File versionNot applicable
File size694
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameIa64_e640176d63db85d7529cff21b9a372f9_31bf3856ad364e35_6.1.7601.22602_none_4a2ff4b6ae2bb687.manifest
File versionNot applicable
File size694
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
File nameIa64_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.18397_none_a8269e887b6a067a.manifest
File versionNot applicable
File size14,511
Date (UTC)14-Feb-2014
Time (UTC)02:23
PlatformNot applicable
File nameIa64_microsoft-windows-ntfs_31bf3856ad364e35_6.1.7601.22602_none_a90c8cf994432666.manifest
File versionNot applicable
File size14,511
Date (UTC)13-Feb-2014
Time (UTC)02:23
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,447
Date (UTC)14-Feb-2014
Time (UTC)08:32
PlatformNot applicable
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Properties

Article ID: 2885209 - Last Review: April 9, 2014 - Revision: 5.1
Applies to
  • Windows Server 2008 R2 Service Pack 1, when used with:
    • Windows Server 2008 R2 Enterprise
    • Windows Server 2008 R2 Datacenter
    • Windows Server 2008 R2 for Itanium-Based Systems
    • Windows Server 2008 R2 Foundation
    • Windows Server 2008 R2 Standard
    • Windows Web Server 2008 R2
  • Windows 7 Service Pack 1, when used with:
    • Windows 7 Enterprise
    • Windows 7 Home Basic
    • Windows 7 Home Premium
    • Windows 7 Professional
    • Windows 7 Starter
    • Windows 7 Ultimate
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced KB2885209

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