A "Stop 0x7F" error message occurs intermittently when you access a storage device in Windows 2000

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SYMPTOMS

You may intermittently receive a "Stop 0x7F" error message while your computer is accessing a storage device. The first Stop parameter is 0x00000000. This parameter indicates a divide by zero error.

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This problem is caused by a divide by zero error that occurs when a DIV instruction is executed, and the divisor is zero. Memory corruption, hardware problems, or software failures can cause this problem. In this case, if the BytesPerSector value of the disk geometry is not initialized correctly, a BytesPerSector value of zero may be passed when the PartitionTable information is requested. This scenario causes the divide by zero error.

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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.

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, submit a request to 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 (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

Microsoft Windows 2000 Service Pack 3 or Service Pack 4

Restart requirement

You must restart your 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 tool in Control Panel.

   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   16-Jan-2004  00:18  5.0.2195.6891      35,632  Classpnp.sys
   24-Feb-2004  05:10  5.0.2195.6901      30,864  Disk.sys

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STATUS

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

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MORE INFORMATION

This hotfix is included in the list of recommended hotfixes to be proactively applied to Windows 2000 server clusters. Click the following article number to view the article that contains this list in the Microsoft Knowledge Base:

895090 (http://support.microsoft.com/kb/895090/ ) Recommended hotfixes for Windows 2000 Service Pack 4-based server clusters

This hotfix should be evaluated and applied proactively to all server clusters that are prone to be negatively affected by the problem that is described in this article.

For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

816915 (http://support.microsoft.com/kb/816915/ ) New file naming schema for Microsoft Windows software update packages

824684 (http://support.microsoft.com/kb/824684/ ) Description of the standard terminology that is used to describe Microsoft software updates

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