If you repeatedly unplug and re-plug a 1394a hard disk on a Windows Vista-based or Windows Server 2008-based computer that has two 1394a hard disks, the other 1394a hard disk becomes inaccessible

Applies to: Windows Vista Enterprise 64-bit EditionWindows Vista Home Basic 64-bit EditionWindows Vista Home Premium 64-bit Edition

Symptoms


On a computer that is running Windows Vista or Windows Server 2008, you have two IEEE 1394a hard disks connected. If you repeatedly unplug and re-plug one of the 1394a hard disks, the other 1394a hard disk becomes inaccessible. Then, you receive a Stop error that resembles the following:
STOP: 0x0000009F (parameter1, parameter2, parameter3, parameter4)
DRIVER_POWER_STATE_FAILURE
Note The Stop error can also occur in other scenarios that involve a single 1394a hard disk. For example, if the power policy is configured to spin down the hard disk after some time, you may receive this Stop error with a single 1394a hard disk. In this example, the Stop error occurs when your computer is left idle for some time.

Cause


This issue occurs because of a race condition in the Sbp2port.sys driver.

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 this specific problem. 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: 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.


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.

Prerequisites

To apply this hotfix, you must have Windows Vista Service Pack 1 or Windows Server 2008 installed on the computer.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information


This hotfix does not replace any other previously released 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 note


The MANIFEST files (.manifest) and MUM files (.mum) 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 Vista and Windows Server 2008

File nameFile versionFile sizeDateTimePlatform
Sbp2port.sys6.0.6001.2237584,96012-Feb-200905:44x86

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

File nameFile versionFile sizeDateTimePlatform
Sbp2port.sys6.0.6001.22375102,88012-Feb-200906:19x64

For all supported Itanium-based versions of Windows Server 2008

File nameFile versionFile sizeDateTimePlatform
Sbp2port.sys6.0.6001.22375276,46412-Feb-200904:52IA-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, 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 Windows Server 2008

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

File namePackage_for_kb960884_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,367
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,421
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,423
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,422
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File nameX86_sbp2.inf_31bf3856ad364e35_6.0.6001.22375_none_457b97820f7515d0.manifest
File versionNot Applicable
File size1,667
Date (UTC)12-Feb-2009
Time (UTC)18:57
PlatformNot Applicable

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

File nameAmd64_sbp2.inf_31bf3856ad364e35_6.0.6001.22375_none_a19a3305c7d28706.manifest
File versionNot Applicable
File size1,669
Date (UTC)12-Feb-2009
Time (UTC)18:59
PlatformNot Applicable
File namePackage_for_kb960884_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,375
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,437
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable

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

File nameIa64_sbp2.inf_31bf3856ad364e35_6.0.6001.22375_none_457d3b780f731ecc.manifest
File versionNot Applicable
File size1,668
Date (UTC)12-Feb-2009
Time (UTC)18:55
PlatformNot Applicable
File namePackage_for_kb960884_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,434
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable
File namePackage_for_kb960884_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)12-Feb-2009
Time (UTC)18:54
PlatformNot Applicable