Event ID 21 is logged when you create a shadow copy backup on a Windows Server 2003-based computer (907875)


The information in this article applies to:

  • Microsoft Windows Server 2003, Standard Edition
  • Microsoft Windows Server 2003, Enterprise Edition
  • Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
  • Microsoft Windows Server 2003, Standard x64 Edition
  • Microsoft Windows Server 2003, Enterprise x64 Edition

SYMPTOMS

When you create a shadow copy backup on a Microsoft Windows Server 2003-based computer, an Error event that is similar to the following is logged in the System log:Event Type: Error
Event Source: VolSnap
Event ID: 21
Description: The flush and hold operation for volume F:\SG2-Log was aborted because of low available system memory.

CAUSE

This problem occurs because the available system memory is low. The low system memory is caused by disk fragmentation.

Note This problem usually occurs only when the /3GB switch is set in the Boot.ini file.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows Server 2003, 32-bit x86-based versions
File nameFile versionFile sizeDateTimePlatform
Swprv.dll5.2.3790.436274,43202-Nov-200521:50x86
Volsnap.sys5.2.3790.436141,82402-Nov-200500:47x86
Vssapi.dll5.2.3790.436545,28002-Nov-200521:50x86
Vssvc.exe5.2.3790.436666,62402-Nov-200500:47x86
Vss_ps.dll5.2.3790.43618,43202-Nov-200521:50x86
Ws03res.dll5.2.3790.43665,53602-Nov-200500:46x86

Windows Server 2003, 32-bit x86-based versions with Service Pack 1
File nameFile versionFile sizeDateTimePlatformSP requirement
Eventcls.dll5.2.3790.256131,23202-Nov-200521:45x86SP1
Ftdisk.sys5.2.3790.2561137,21602-Nov-200501:55x86SP1
Partmgr.sys5.2.3790.256125,08802-Nov-200502:23x86SP1
Swprv.dll5.2.3790.2561275,96802-Nov-200506:00x86SP1
Volsnap.sys5.2.3790.2561153,08802-Nov-200501:55x86SP1
Vssadmin.exe5.2.3790.2561133,63202-Nov-200501:55x86SP1
Vssapi.dll5.2.3790.2561561,15202-Nov-200521:45x86SP1
Vssui.dll5.2.3790.2561144,38402-Nov-200521:45x86SP1
Vssvc.exe5.2.3790.2561835,58402-Nov-200501:55x86SP1
Vss_ps.dll5.2.3790.256119,45602-Nov-200521:45x86SP1

Windows Server 2003, 64-bit x64-based versions
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Eventcls.dll5.2.3790.256146,08002-Nov-200506:09x64SP1Not Applicable
Ftdisk.sys5.2.3790.2561240,12802-Nov-200506:09x64SP1Not Applicable
Partmgr.sys5.2.3790.256145,05602-Nov-200506:09x64SP1Not Applicable
Volsnap.sys5.2.3790.2561288,76802-Nov-200506:09x64SP1Not Applicable
Vssui.dll5.2.3790.2561233,47202-Nov-200506:09x64SP1Not Applicable
Vss_ps.dll5.2.3790.256125,60002-Nov-200506:09x64SP1Not Applicable
Swprv.dll5.2.3790.2561653,82402-Nov-200506:09x64SP1Not Applicable
Vssadmin.exe5.2.3790.2561245,24802-Nov-200506:09x64SP1Not Applicable
Vssapi.dll5.2.3790.25611,320,44802-Nov-200506:09x64SP1Not Applicable
Vssvc.exe5.2.3790.25612,061,31202-Nov-200506:09x64SP1Not Applicable
Swprv.dll5.2.3790.2561653,82402-Nov-200506:09x64SP1Not Applicable
Vssadmin.exe5.2.3790.2561245,24802-Nov-200506:09x64SP1Not Applicable
Vssapi.dll5.2.3790.25611,320,44802-Nov-200506:09x64SP1Not Applicable
Vssvc.exe5.2.3790.25612,061,31202-Nov-200506:09x64SP1Not Applicable
Swprv.dll5.2.3790.2561653,82402-Nov-200506:09x64SP1Not Applicable
Vssadmin.exe5.2.3790.2561245,24802-Nov-200506:09x64SP1Not Applicable
Vssapi.dll5.2.3790.25611,320,44802-Nov-200506:09x64SP1Not Applicable
Vssvc.exe5.2.3790.25612,061,31202-Nov-200506:09x64SP1Not Applicable
Swprv.dll5.2.3790.2561653,82402-Nov-200506:09x64SP1Not Applicable
Vssadmin.exe5.2.3790.2561245,24802-Nov-200506:09x64SP1Not Applicable
Vssapi.dll5.2.3790.25611,320,44802-Nov-200506:09x64SP1Not Applicable
Vssvc.exe5.2.3790.25612,061,31202-Nov-200506:09x64SP1Not Applicable
Wvssapi.dll5.2.3790.2561561,15202-Nov-200506:09x86NoneWOW
Wvss_ps.dll5.2.3790.256119,45602-Nov-200506:09x86NoneWOW

Windows Server 2003, 64-bit Itanium-based versions
File nameFile versionFile sizeDateTimePlatformService branch
Swprv.dll5.2.3790.436706,04802-Nov-200506:09IA-64Not Applicable
Volsnap.sys5.2.3790.436419,84002-Nov-200506:09IA-64Not Applicable
Vssapi.dll5.2.3790.4361,351,16802-Nov-200506:09IA-64Not Applicable
Vssvc.exe5.2.3790.4361,801,21602-Nov-200506:09IA-64Not Applicable
Vss_ps.dll5.2.3790.43628,16002-Nov-200506:09IA-64Not Applicable
Ws03res.dll5.2.3790.43665,02402-Nov-200506:09IA-64Not Applicable
Wvssapi.dll5.2.3790.436545,28002-Nov-200506:09x86WOW
Wvss_ps.dll5.2.3790.43618,43202-Nov-200506:09x86WOW
Wws03res.dll5.2.3790.43665,53602-Nov-200506:09x86WOW

Windows Server 2003, 64-bit Itanium-based versions with Service Pack 1
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Eventcls.dll5.2.3790.256182,43202-Nov-200506:09IA-64SP1Not Applicable
Ftdisk.sys5.2.3790.2561498,68802-Nov-200506:09IA-64SP1Not Applicable
Partmgr.sys5.2.3790.256183,45602-Nov-200506:09IA-64SP1Not Applicable
Volsnap.sys5.2.3790.2561476,16002-Nov-200506:09IA-64SP1Not Applicable
Vssui.dll5.2.3790.2561408,06402-Nov-200506:09IA-64SP1Not Applicable
Vss_ps.dll5.2.3790.256131,23202-Nov-200506:09IA-64SP1Not Applicable
Swprv.dll5.2.3790.2561831,48802-Nov-200506:09IA-64SP1Not Applicable
Vssadmin.exe5.2.3790.2561314,36802-Nov-200506:09IA-64SP1Not Applicable
Vssapi.dll5.2.3790.25611,642,49602-Nov-200506:09IA-64SP1Not Applicable
Vssvc.exe5.2.3790.25612,588,67202-Nov-200506:09IA-64SP1Not Applicable
Swprv.dll5.2.3790.2561831,48802-Nov-200506:09IA-64SP1Not Applicable
Vssadmin.exe5.2.3790.2561314,36802-Nov-200506:09IA-64SP1Not Applicable
Vssapi.dll5.2.3790.25611,642,49602-Nov-200506:09IA-64SP1Not Applicable
Vssvc.exe5.2.3790.25612,588,67202-Nov-200506:09IA-64SP1Not Applicable
Wvssapi.dll5.2.3790.2561561,15202-Nov-200506:09x86SP1WOW
Wvss_ps.dll5.2.3790.256119,45602-Nov-200506:09x86SP1WOW

WORKAROUND

To work around this problem, remove the /3GB switch in the Boot.ini file to relieve pressure on pool memory.

STATUS

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

MORE INFORMATION

This Error event is also reported for other conditions. If you do not use the /3GB switch in the Boot.ini file or if have more than 20 percent pool memory space free, you will probably not experience this problem. For more information, 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

Technical support for x64-based versions of Microsoft Windows

Your hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:

http://www.microsoft.com/windowsxp/64bit/default.mspx

For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site:

http://www.microsoft.com/windowsserver2003/64bit/x64/default.mspx

Modification Type:MinorLast Reviewed:7/26/2006
Keywords:kbWinServ2003preSP2fix kbBug kbfix kbHotfixServer kbQFE kbpubtypekc KB907875 kbAudITPRO
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