An update for the Msahci.sys driver has been released for AMD chipsets

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Article ID: 974073 - View products that this article applies to.
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SUMMARY

This article discusses an update for the Microsoft Advanced Host Controller Interface (AHCI) driver, Msahci.sys. This driver was specifically built for the Serial Advanced Technology Attachment (SATA) mode of a disk device. The update changes the Msahci.sys driver so that the driver does not call RecordExecutionHistory(), which is called at various times, such as after each command execution. This function copies the AHCI registers into an execution history buffer for debugging. This copy activity can decrease the performance of AMD-based CPU chipsets because Msahci.sys logs entries every time that it is executed.

MORE 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=support
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.

Prerequisites

To apply this hotfix, your computer must be running one of the following operating systems:
  • Windows Vista Service Pack 1 (SP1)
  • Windows Vista Service Pack 2 (SP2)
  • Windows Server 2008
  • Windows Server 2008 Service Pack 2 (SP2)
For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

The global version of this hotfix uses a Microsoft Windows Installer package to install the hotfix. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date 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

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.0.6001.22xxxWindows Vista SP1 and Windows Server 2008 SP1SP1LDR
    6.0.6002.22xxxWindows Vista SP2 and Windows Server 2008 SP2SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000. xxxxxx version number.
  • 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 Server 2008 and of Windows Vista

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Aliide.sys1.2.0.014,40822-Sep-200913:04x86
Aliide.sys1.2.0.014,39222-Sep-200913:02x86
Amdide.sys6.0.6001.2252814,92022-Sep-200913:04x86
Amdide.sys6.0.6002.2223014,90422-Sep-200913:02x86
Atapi.sys6.0.6001.2252821,06422-Sep-200913:04x86
Atapi.sys6.0.6002.2223021,04822-Sep-200913:02x86
Ataport.sys6.0.6001.22528107,59222-Sep-200913:04x86
Ataport.sys6.0.6002.22230107,57622-Sep-200913:02x86
Cmdide.sys2.0.7.015,94422-Sep-200913:04x86
Cmdide.sys2.0.7.015,92822-Sep-200913:02x86
Intelide.sys6.0.6001.2252814,92022-Sep-200913:05x86
Intelide.sys6.0.6002.2223014,90422-Sep-200913:02x86
Msahci.sys6.0.6001.2252825,67222-Sep-200913:05x86
Msahci.sys6.0.6002.2223025,65622-Sep-200913:03x86
Pciide.sys6.0.6001.2252813,38422-Sep-200913:05x86
Pciide.sys6.0.6002.2223013,36822-Sep-200913:03x86
Pciidex.sys6.0.6001.2252842,05622-Sep-200913:05x86
Pciidex.sys6.0.6002.2223042,04022-Sep-200913:03x86
Viaide.sys5.1.3790.15016,96822-Sep-200913:05x86
Viaide.sys5.1.3790.15016,95222-Sep-200913:03x86

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

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Aliide.sys1.2.0.015,43222-Sep-200913:27x64
Amdide.sys6.0.6001.2252815,43222-Sep-200913:27x64
Amdide.sys6.0.6002.2223015,41622-Sep-200912:42x64
Atapi.sys6.0.6001.2252823,62422-Sep-200913:27x64
Atapi.sys6.0.6002.2223023,60822-Sep-200912:42x64
Ataport.sys6.0.6001.22528121,92822-Sep-200913:27x64
Ataport.sys6.0.6002.22230121,91222-Sep-200912:42x64
Cmdide.sys2.0.7.017,48022-Sep-200913:27x64
Cmdide.sys2.0.7.017,46422-Sep-200912:43x64
Intelide.sys6.0.6001.2252816,45622-Sep-200913:27x64
Intelide.sys6.0.6002.2223016,44022-Sep-200912:43x64
Msahci.sys6.0.6001.2252828,23222-Sep-200913:27x64
Msahci.sys6.0.6002.2223028,21622-Sep-200912:43x64
Pciide.sys6.0.6001.2252813,38422-Sep-200913:27x64
Pciide.sys6.0.6002.2223013,36822-Sep-200912:43x64
Pciidex.sys6.0.6001.2252848,20022-Sep-200913:27x64
Pciidex.sys6.0.6002.2223048,18422-Sep-200912:43x64
Viaide.sys5.1.3790.15017,48022-Sep-200913:28x64
Viaide.sys5.1.3790.15017,46422-Sep-200912:43x64

For all supported IA-64-based versions of Windows Server 2008

Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Aliide.sys1.2.0.019,01622-Sep-200913:02IA-64
Aliide.sys1.2.0.019,00022-Sep-200912:45IA-64
Atapi.sys6.0.6001.2252844,61622-Sep-200913:02IA-64
Atapi.sys6.0.6002.2223044,60022-Sep-200912:45IA-64
Ataport.sys6.0.6001.22528305,73622-Sep-200913:02IA-64
Ataport.sys6.0.6002.22230305,72022-Sep-200912:45IA-64
Cmdide.sys2.0.7.026,69622-Sep-200913:02IA-64
Cmdide.sys2.0.7.026,68022-Sep-200912:45IA-64
Intelide.sys6.0.6001.2252821,06422-Sep-200913:02IA-64
Intelide.sys6.0.6002.2223021,04822-Sep-200912:45IA-64
Msahci.sys6.0.6001.2252859,97622-Sep-200913:02IA-64
Msahci.sys6.0.6002.2223059,96022-Sep-200912:46IA-64
Pciide.sys6.0.6001.2252818,50422-Sep-200913:02IA-64
Pciide.sys6.0.6002.2223018,48822-Sep-200912:46IA-64
Pciidex.sys6.0.6001.22528108,61622-Sep-200913:02IA-64
Pciidex.sys6.0.6002.22230108,60022-Sep-200912:46IA-64
Viaide.sys5.1.3790.15028,23222-Sep-200913:02IA-64
Viaide.sys5.1.3790.15028,21622-Sep-200912:46IA-64

STATUS

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

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

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

Collapse this tableExpand this table
File namePackage_1_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,805
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_2_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,972
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_3_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,810
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_4_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,810
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_5_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,460
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_6_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,299
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_7_for_kb974073~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size2,299
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,367
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,694
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,713
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,421
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,690
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,701
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,694
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,713
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,422
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)23-Sep-2009
Time (UTC)07:11
File nameX86_mshdc.inf_31bf3856ad364e35_6.0.6001.22528_none_ddb42ef53ab0659c.manifest
File versionNot Applicable
File size6,874
Date (UTC)23-Sep-2009
Time (UTC)07:18
File nameX86_mshdc.inf_31bf3856ad364e35_6.0.6002.22230_none_df87cea137e60bf9.manifest
File versionNot Applicable
File size6,874
Date (UTC)23-Sep-2009
Time (UTC)07:18

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

Collapse this tableExpand this table
File nameAmd64_mshdc.inf_31bf3856ad364e35_6.0.6001.22528_none_39d2ca78f30dd6d2.manifest
File versionNot Applicable
File size6,876
Date (UTC)23-Sep-2009
Time (UTC)07:33
File nameAmd64_mshdc.inf_31bf3856ad364e35_6.0.6002.22230_none_3ba66a24f0437d2f.manifest
File versionNot Applicable
File size6,876
Date (UTC)23-Sep-2009
Time (UTC)07:33
File namePackage_1_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,815
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_2_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,984
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_3_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,820
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_4_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,820
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_5_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,478
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_6_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,315
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_7_for_kb974073~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,315
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,375
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,706
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,723
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,702
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,711
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,706
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,723
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,438
Date (UTC)23-Sep-2009
Time (UTC)07:11

Additional files for all supported IA-64-based versions of Windows Vista and Windows Server 2008

Collapse this tableExpand this table
File nameIa64_mshdc.inf_31bf3856ad364e35_6.0.6001.22528_none_ddb5d2eb3aae6e98.manifest
File versionNot Applicable
File size6,297
Date (UTC)23-Sep-2009
Time (UTC)07:11
File nameIa64_mshdc.inf_31bf3856ad364e35_6.0.6002.22230_none_df89729737e414f5.manifest
File versionNot Applicable
File size6,297
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_1_for_kb974073~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,810
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_2_for_kb974073~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,815
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_3_for_kb974073~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,815
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_4_for_kb974073~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size2,140
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_5_for_kb974073~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size2,140
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,530
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,706
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,533
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,718
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)23-Sep-2009
Time (UTC)07:11
File namePackage_for_kb974073_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,434
Date (UTC)23-Sep-2009
Time (UTC)07:11

Properties

Article ID: 974073 - Last Review: October 7, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Service Pack 2, when used with:
    • Windows Server 2008 Datacenter without Hyper-V
    • Windows Server 2008 Enterprise without Hyper-V
    • Windows Server 2008 for Itanium-Based Systems
    • Windows Server 2008 Standard without Hyper-V
    • Windows Server 2008 Datacenter
    • Windows Server 2008 Enterprise
    • Windows Server 2008 Standard
    • Windows Web Server 2008
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 for Itanium-Based Systems
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Web Server 2008
  • Windows Vista Service Pack 2, when used with:
    • Windows Vista Business
    • Windows Vista Enterprise
    • Windows Vista Home Basic
    • Windows Vista Home Premium
    • Windows Vista Starter
    • Windows Vista Ultimate
    • Windows Vista Enterprise 64-bit Edition
    • Windows Vista Home Basic 64-bit Edition
    • Windows Vista Home Premium 64-bit Edition
    • Windows Vista Ultimate 64-bit Edition
    • Windows Vista Business 64-bit Edition
  • Windows Vista Service Pack 1, when used with:
    • Windows Vista Business
    • Windows Vista Enterprise
    • Windows Vista Home Basic
    • Windows Vista Home Premium
    • Windows Vista Starter
    • Windows Vista Ultimate
    • Windows Vista Enterprise 64-bit Edition
    • Windows Vista Home Basic 64-bit Edition
    • Windows Vista Home Premium 64-bit Edition
    • Windows Vista Ultimate 64-bit Edition
    • Windows Vista Business 64-bit Edition
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Starter
  • Windows Vista Ultimate
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business 64-bit Edition
Keywords: 
kbexpertiseinter kbsurveynew kbfix kbbug kbqfe KB974073

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