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Symptoms

You receive the following Stop error message on a computer that is running Windows Server 2008 R2 or Windows 7:

0x00000019 (00000021, parameter2, parameter3, parameter4)

BAD_POOL_HEADER


This behavior occurs when you change the Internet SCSI (iSCSI) configurations on the computer and you retrieve some iSCSI connection statistics by using Windows Management Instrumentation(WMI).



Note

  • The configuration of the computer determines the parameters in this error message.

  • Not all "0x00000019" Stop errors are caused by this problem.

Cause

The iSCSI driver (Msiscsi.sys) does not manage allocated pool space correctly. This behavior leads to pool corruption. Therefore, when the corrupted pool is accessed, the system triggers the stop code 0x00000019.

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, the computer must be running one of the following operating systems:

  • Windows Server 2008 R2

  • Windows 7

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfix.

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 item in Control Panel.

Windows Server 2008 R2 and Windows 7 file information note


The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are
listed separately
. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7


File name

File version

File size

Date

Time

Platform

Iscsi.inf

Not Applicable

7,312

24-Oct-2009

00:14

Not Applicable

Iscsilog.dll

6.1.7600.16385

16,384

14-Jul-2009

01:06

x86

Msiscsi.sys

6.1.7600.20557

186,952

24-Oct-2009

07:00

x86

For all supported x64-based versions of Windows Server 2008 R2 and of Windows7


File name

File version

File size

Date

Time

Platform

Iscsi.inf

Not Applicable

7,320

24-Oct-2009

00:14

Not Applicable

Iscsilog.dll

6.1.7600.16385

16,384

14-Jul-2009

01:28

x64

Msiscsi.sys

6.1.7600.20557

224,840

24-Oct-2009

07:41

x64

For all supported Itanium-based versions of Windows Server 2008 R2


File name

File version

File size

Date

Time

Platform

Iscsi.inf

Not Applicable

7,316

24-Oct-2009

00:11

Not Applicable

Iscsilog.dll

6.1.7600.16385

16,384

14-Jul-2009

01:36

IA-64

Msiscsi.sys

6.1.7600.20557

513,608

24-Oct-2009

06:11

IA-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 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

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

Additional files for all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Package_for_kb976443_rtm~31bf3856ad364e35~x86~~6.1.1.0.mum

Not Applicable

1,714

24-Oct-2009

10:15

Not Applicable

X86_iscsi.inf_31bf3856ad364e35_6.1.7600.20557_none_3d462ae06dfdc36b.manifest

Not Applicable

2,456

24-Oct-2009

10:17

Not Applicable


Additional files for all supported x64-based versions of Windows Server 2008 R2 and of Windows 7


File name

File version

File size

Date

Time

Platform

Amd64_iscsi.inf_31bf3856ad364e35_6.1.7600.20557_none_9964c664265b34a1.manifest

Not Applicable

2,460

24-Oct-2009

10:19

Not Applicable

Package_for_kb976443_rtm~31bf3856ad364e35~amd64~~6.1.1.0.mum

Not Applicable

1,724

24-Oct-2009

10:15

Not Applicable

Additional files for all supported Itanium-based versions of Windows Server 2008 R2


File name

File version

File size

Date

Time

Platform

Ia64_iscsi.inf_31bf3856ad364e35_6.1.7600.20557_none_3d47ced66dfbcc67.manifest

Not Applicable

2,458

24-Oct-2009

10:15

Not Applicable

Package_for_kb976443_rtm~31bf3856ad364e35~ia64~~6.1.1.0.mum

Not Applicable

1,444

24-Oct-2009

10:15

Not Applicable

References

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

974201 Stop error message when you retrieve WMI connection statistics for iSCSI after you change the iSCSI configurations on a computer that is running Windows Server 2008 or Windows Vista: "0x00000019 BAD_POOL_HEADER"

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