Article ID: 907875
Article Last Modified on 10/11/2007
APPLIES TO
- Microsoft Windows Server 2003, Standard Edition (32-bit x86)
- 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
Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003
Hotfix information
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 name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Swprv.dll | 5.2.3790.436 | 274,432 | 02-Nov-2005 | 21:50 | x86 |
| Volsnap.sys | 5.2.3790.436 | 141,824 | 02-Nov-2005 | 00:47 | x86 |
| Vssapi.dll | 5.2.3790.436 | 545,280 | 02-Nov-2005 | 21:50 | x86 |
| Vssvc.exe | 5.2.3790.436 | 666,624 | 02-Nov-2005 | 00:47 | x86 |
| Vss_ps.dll | 5.2.3790.436 | 18,432 | 02-Nov-2005 | 21:50 | x86 |
| Ws03res.dll | 5.2.3790.436 | 65,536 | 02-Nov-2005 | 00:46 | x86 |
Windows Server 2003, 32-bit x86-based versions with Service Pack 1
| File name | File version | File size | Date | Time | Platform | SP requirement |
|---|---|---|---|---|---|---|
| Eventcls.dll | 5.2.3790.2561 | 31,232 | 02-Nov-2005 | 21:45 | x86 | SP1 |
| Ftdisk.sys | 5.2.3790.2561 | 137,216 | 02-Nov-2005 | 01:55 | x86 | SP1 |
| Partmgr.sys | 5.2.3790.2561 | 25,088 | 02-Nov-2005 | 02:23 | x86 | SP1 |
| Swprv.dll | 5.2.3790.2561 | 275,968 | 02-Nov-2005 | 06:00 | x86 | SP1 |
| Volsnap.sys | 5.2.3790.2561 | 153,088 | 02-Nov-2005 | 01:55 | x86 | SP1 |
| Vssadmin.exe | 5.2.3790.2561 | 133,632 | 02-Nov-2005 | 01:55 | x86 | SP1 |
| Vssapi.dll | 5.2.3790.2561 | 561,152 | 02-Nov-2005 | 21:45 | x86 | SP1 |
| Vssui.dll | 5.2.3790.2561 | 144,384 | 02-Nov-2005 | 21:45 | x86 | SP1 |
| Vssvc.exe | 5.2.3790.2561 | 835,584 | 02-Nov-2005 | 01:55 | x86 | SP1 |
| Vss_ps.dll | 5.2.3790.2561 | 19,456 | 02-Nov-2005 | 21:45 | x86 | SP1 |
Windows Server 2003, 64-bit x64-based versions
| File name | File version | File size | Date | Time | Platform | SP requirement | Service branch |
|---|---|---|---|---|---|---|---|
| Eventcls.dll | 5.2.3790.2561 | 46,080 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Ftdisk.sys | 5.2.3790.2561 | 240,128 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Partmgr.sys | 5.2.3790.2561 | 45,056 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Volsnap.sys | 5.2.3790.2561 | 288,768 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssui.dll | 5.2.3790.2561 | 233,472 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vss_ps.dll | 5.2.3790.2561 | 25,600 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 653,824 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 245,248 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,320,448 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,061,312 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 653,824 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 245,248 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,320,448 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,061,312 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 653,824 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 245,248 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,320,448 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,061,312 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 653,824 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 245,248 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,320,448 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,061,312 | 02-Nov-2005 | 06:09 | x64 | SP1 | Not Applicable |
| Wvssapi.dll | 5.2.3790.2561 | 561,152 | 02-Nov-2005 | 06:09 | x86 | None | WOW |
| Wvss_ps.dll | 5.2.3790.2561 | 19,456 | 02-Nov-2005 | 06:09 | x86 | None | WOW |
Windows Server 2003, 64-bit Itanium-based versions
| File name | File version | File size | Date | Time | Platform | Service branch |
|---|---|---|---|---|---|---|
| Swprv.dll | 5.2.3790.436 | 706,048 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Volsnap.sys | 5.2.3790.436 | 419,840 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Vssapi.dll | 5.2.3790.436 | 1,351,168 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Vssvc.exe | 5.2.3790.436 | 1,801,216 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Vss_ps.dll | 5.2.3790.436 | 28,160 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Ws03res.dll | 5.2.3790.436 | 65,024 | 02-Nov-2005 | 06:09 | IA-64 | Not Applicable |
| Wvssapi.dll | 5.2.3790.436 | 545,280 | 02-Nov-2005 | 06:09 | x86 | WOW |
| Wvss_ps.dll | 5.2.3790.436 | 18,432 | 02-Nov-2005 | 06:09 | x86 | WOW |
| Wws03res.dll | 5.2.3790.436 | 65,536 | 02-Nov-2005 | 06:09 | x86 | WOW |
Windows Server 2003, 64-bit Itanium-based versions with Service Pack 1
| File name | File version | File size | Date | Time | Platform | SP requirement | Service branch |
|---|---|---|---|---|---|---|---|
| Eventcls.dll | 5.2.3790.2561 | 82,432 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Ftdisk.sys | 5.2.3790.2561 | 498,688 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Partmgr.sys | 5.2.3790.2561 | 83,456 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Volsnap.sys | 5.2.3790.2561 | 476,160 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssui.dll | 5.2.3790.2561 | 408,064 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vss_ps.dll | 5.2.3790.2561 | 31,232 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 831,488 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 314,368 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,642,496 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,588,672 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Swprv.dll | 5.2.3790.2561 | 831,488 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssadmin.exe | 5.2.3790.2561 | 314,368 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssapi.dll | 5.2.3790.2561 | 1,642,496 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Vssvc.exe | 5.2.3790.2561 | 2,588,672 | 02-Nov-2005 | 06:09 | IA-64 | SP1 | Not Applicable |
| Wvssapi.dll | 5.2.3790.2561 | 561,152 | 02-Nov-2005 | 06:09 | x86 | SP1 | WOW |
| Wvss_ps.dll | 5.2.3790.2561 | 19,456 | 02-Nov-2005 | 06:09 | x86 | SP1 | WOW |
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. This problem was first corrected in Windows Server 2003 Service Pack 2.
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:
For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site:
Additional query words: 3gb memory event21 Winx64 Windowsx64 64bit 64-bit
Keywords: kbbug kbfix kbqfe kbpubtypekc kbhotfixserver kbwinserv2003presp2fix kbwinserv2003sp2fix KB907875
