Support for ATA 100 (Mode 5 ) in Windows 2000

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Article ID: 260233 - View products that this article applies to.
This article was previously published under Q260233
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Windows 2000 does not support ATA 100 (Mode 5) for IDE hard disks. All ATA 100 IDE hard disks that are used with Windows 2000 default to ATA 66 (Mode 4).


To resolve this problem, install Windows 2000 Service Pack 2. For more information and to download the Service Pack, visit the following Microsoft Web site:
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Windows 2000 service pack that contains this fix.

To resolve this problem immediately, download the fix by clicking the download link later in this article or contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The following file is available for download from the Microsoft Download Center:
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Download Q260233_w2k_sp2_x86_en.exe now
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:
   Date        Time    Version         Size    File name
   04/27/2000  04:05p  5.00.2195.2073  85,232  Atapi.sys
   04/27/2000  04:05p  5.00.2195.2073   4,432  Intelide.sys
   04/27/2000  04:05p  5.00.2195.2073   3,088  Pciide.sys
   04/27/2000  04:05p  5.00.2195.2073  21,936  Pciidex.sys


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was corrected in Windows 2000 Service Pack 2.

More information

After you install this hotfix, you may notice an incorrect "PIO" value displayed on the Advanced Settings tab for an IDE device in Device Manager. This does not mean that the device is functioning in "PIO" mode. Windows 2000 is displaying an incorrect value.

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes


Article ID: 260233 - Last Review: November 2, 2013 - Revision: 7.0
Applies to
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix kbgraphxlinkcritical kbwin2000presp2fix KB260233

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