Microsoft KB Archive/822000

= You may receive a Stop error message when you unexpectedly remove a logical unit number (LUN) from a Windows 2000 Server-based computer =

Article ID: 822000

Article Last Modified on 7/24/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
When you unexpectedly remove a logical unit number (LUN) from a Microsoft Windows 2000 Server-based computer, you may receive the following Stop error message:

Bugcheck 0xd1

DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)

An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses.

This Stop error may have the following arguments:
 * Arg1: b7b81fe8, memory referenced
 * Arg2: 00000002, IRQL
 * Arg3: 00000000, value 0 = read operation, 1 = write operation
 * Arg4: bff4d3c5, address which referenced memory



CAUSE
This problem occurs because of a bug in the disk class driver.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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.

Prerequisites
To install this hotfix, you must have Windows 2000 Service Pack 2 (SP2) or a later Windows 2000 service pack installed on your computer.

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 --  14-Apr-2003  20:53  5.0.2195.6736      35,856  Classpnp.sys 29-May-2003 16:25  5.0.2195.6749      30,768  Disk.sys



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

