This article has been archived. It is offered "as is" and will no longer be updated.
On a computer that is running Microsoft Windows 2000 Service Pack 4 (SP4), the following two events may appear repeatedly in the system log of Event Viewer:
Event Source: Disk Event Category None Event ID: 32 Date: date Time: time Event Type: Warning Description: The driver detected that the device \Device\Harddisk2\DR2 has its write cache enabled. Data corruption may occur.
Event Source: Disk Event Category: None Event ID: 51 Date: date Time: time Event Type: Warning Description: An error was detected on device \Device\Harddisk2\DR2 during a paging operation.
This problem occurs if you have installed one or more storage devices that do not support cache commands. The Windows 2000 SP4 Disk.sys driver writes many events to the system log when it performs write operations to a storage device that does not support cache commands.
Some storage devices do not support cache control commands, such as the WRITE command when it is used with the ForceUnitAccess option or the MODE SELECT command that is used to change the cache. While Microsoft Windows 2000 Service Pack 3 (SP3) also logs events in the system log when it accesses a storage device that does not support cache commands, Windows 2000 SP3 writes these events only when it first accesses the device. However, Windows 2000 SP4 writes many warning events to the system log every time that it accesses the device that does not support cache commands.
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:
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.
You must be running Microsoft Windows 2000 Service Pack 4 to install this hotfix. For additional information about how to obtain the latest Windows 2000 Service Pack, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to obtain the latest Windows 2000 service pack
You must restart your computer after you apply this hotfix. However, you do not have to restart your computer immediately after you install this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
The English version of this has the file attributes (or later) 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 88,048 Atapi.sys 16-Jan-2004 00:18 5.0.2195.6891 35,632 Classpnp.sys 16-Jan-2004 00:19 5.0.2195.6891 30,832 Disk.sys
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
For additional information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
824684 Description of the standard terminology that is used to describe Microsoft software updates