On a computer that is running Windows Vista or Windows Server 2008, iSCSI Initiator may be unable to communicate with the iSCSI target for several minutes after an iSCSI Protocol Data Unit (PDU) is rejected

Support for Windows Vista Service Pack 1 (SP1) ends on July 12, 2011. To continue receiving security updates for Windows, make sure you're running Windows Vista with Service Pack 2 (SP2). For more information, refer to this Microsoft web page: Support is ending for some versions of Windows.

Symptoms

Consider the following scenario:

  • You use Microsoft iSCSI Initiator to connect to an iSCSI target from a computer that is running Windows Vista or Windows Server 2008.

  • An iSCSI Protocol Data Unit (PDU) is rejected by the target for one of the reasons that are outlined in section 10.17.1 of iSCSI Specification Request for Comment (RFC) 3720.

In this scenario, iSCSI Initiator should resend the PDU that was rejected by the iSCSI target. However, iSCSI Initiator may be unable to communicate with the iSCSI target for several minutes.

Specifically, iSCSI Initiator cannot communicate with the target for a period of five times the Disk Timeout value that is specified in the following registry entry:

Subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Disk
Entry: TimeoutValue
Type: REG_DWORD
Value: The Disk Timeout Value in seconds After a period of five times the Disk Timeout Value elapses, iSCSI Initiator performs session recovery, and then the iSCSI session is dropped and reestablished. Eventually, iSCSI Initiator may be able to communicate with the iSCSI target again.

Cause

This problem may occur because of a defect in how iSCSI Initiator determines how many times it has re-sent a rejected PDU. This defect makes the iSCSI target unresponsive. Therefore, iSCSI Initiator performs LUN resets in order to communicate with the iSCSI target. It does this instead of immediately retrying the rejected PDU.

Resolution

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

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 on a Windows Vista-based computer, you must have Windows Vista Service Pack 1 installed.

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

935791 How to obtain the latest Windows Vista service pack

No prerequisites are required for Windows Server 2008-based computers.

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 item in Control Panel.

Windows Vista and Windows Server 2008 file information notes

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    Milestone

    Service branch

    6.0.6000.16xxx

    Windows Vista

    RTM

    GDR

    6.0.6000.20xxx

    Windows Vista

    RTM

    LDR

    6.0.6001.18xxx

    Windows Vista SP1 and Windows Server 2008 SP1

    SP1

    GDR

    6.0.6001.22xxx

    Windows Vista SP1 and Windows Server 2008 SP1

    SP1

    LDR

  • Service Pack 1 is integrated into Windows Server 2008.

  • The MANIFEST files (.manifest) and 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 Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Iscsilog.dll

6.0.6001.22299

14,848

31-Oct-2008

01:23

x86

Msiscsi.sys

6.0.6001.22299

179,976

31-Oct-2008

03:43

x86

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

File name

File version

File size

Date

Time

Platform

Iscsilog.dll

6.0.6001.22299

14,848

31-Oct-2008

02:45

x64

Msiscsi.sys

6.0.6001.22299

213,768

31-Oct-2008

05:06

x64

For all supported Itanium-based versions of Windows Server 2008

File name

File version

File size

Date

Time

Platform

Iscsilog.dll

6.0.6001.22299

14,848

31-Oct-2008

02:46

IA-64

Msiscsi.sys

6.0.6001.22299

491,784

31-Oct-2008

05:01

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 iSCSI Specification RFC 3720, visit the following Internet Engineering Task Force (IETF) Web site:

https://www.ietf.org/rfc/rfc3720.txtMicrosoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact 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 for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

Package_for_kb959384_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,367

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_client~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,431

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,421

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,423

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,425

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,431

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,422

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum

File version

Not Applicable

File size

1,429

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

X86_iscsi.inf_31bf3856ad364e35_6.0.6001.22299_none_3cf517b30d052ea7.manifest

File version

Not Applicable

File size

2,250

Date (UTC)

05-Nov-2008

Time (UTC)

02:47

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

File name

Amd64_iscsi.inf_31bf3856ad364e35_6.0.6001.22299_none_9913b336c5629fdd.manifest

File version

Not Applicable

File size

2,252

Date (UTC)

05-Nov-2008

Time (UTC)

05:05

File name

Package_for_kb959384_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,375

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_client~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,439

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,429

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,431

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,433

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,439

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,430

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum

File version

Not Applicable

File size

1,437

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

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

File name

Ia64_iscsi.inf_31bf3856ad364e35_6.0.6001.22299_none_3cf6bba90d0337a3.manifest

File version

Not Applicable

File size

2,251

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,425

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,426

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,429

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_server~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,434

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,426

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

File name

Package_for_kb959384_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum

File version

Not Applicable

File size

1,433

Date (UTC)

05-Nov-2008

Time (UTC)

02:11

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