"Stop Error IRQL_NOT_LESS_OR_EQUAL (0xA)" error message when you run Windows 2000 Server on a computer that has multiple processors

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When you run Microsoft Windows 2000 Server on a computer that has multiple processors, you receive the following error message:
This problem occurs when the Cache Manager SHARED_CACHE_MAP structure is corrupted on the Windows 2000 Server-based computer.

Note SHARED_CACHE_MAP is the data structure that is used by the Cache Manager totrack the state of individual cached regions of the file.

The Windows 2000 Cache Manager has a small timing window. Therefore, when the Windows 2000 Cache Manager maintains lots of data in memory, some linked lists in memory that are managed by the Windows 2000 Cache Manager may become temporarily corrupted. In this case, an access violation may occur around CcAcquireByteRangeForWrite+0x390.
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.


No prerequisites are required.

Restart requirement

You must restart your computer after you apply this hotfix.

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   --------------------------------------------------------------   10-Feb-2004  19:47  5.0.2195.6897      30,160  Mountmgr.sys   12-Jan-2005  06:42  5.0.2195.7020   1,713,024  Ntkrnlmp.exe        12-Jan-2005  06:42  5.0.2195.7020   1,712,192  Ntkrnlpa.exe        12-Jan-2005  06:42  5.0.2195.7020   1,734,464  Ntkrpamp.exe        12-Jan-2005  06:41  5.0.2195.7020   1,689,216  Ntoskrnl.exe    
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Stack output

IRQL_NOT_LESS_OR_EQUAL (a)Arg1: fffffff0, memory referencedArg2: 00000002, IRQLArg3: 00000000, value 0 = read operation, 1 = write operationArg4: 8040df56, address which referenced memorybe0d9bfc 8040ec83 87fb8908 00000000 00000000 nt!CcAcquireByteRangeForWrite+0x390be0d9cd4 8040e626 87f3a0f4 00000000 00000001 nt!CcFlushCache+0x2c7be0d9d0c 80412efa 890518e8 80476800 836ddb60 nt!CcWriteBehind+0x124be0d9d78 80416fad 890518e8 00000000 00000000 nt!CcWorkerThread+0x158be0d9da8 804551f6 890518e8 00000000 00000000 nt!ExpWorkerThread+0xafbe0d9ddc 8046a512 80416efe 80000000 00000000 nt!PspSystemThreadStartup+0x5400000000 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x16

Article ID: 892045 - Last Review: 12/09/2015 02:01:52 - Revision: 1.6

Microsoft Windows 2000 Datacenter Server, Microsoft Windows 2000 Advanced Server, Microsoft Windows 2000 Server

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