Volume mount points on disks in a server cluster may intermittently become unavailable after you install Windows Server 2003 Service Pack 1

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SYMPTOMS

After you install Microsoft Windows Server 2003, Enterprise x64 edition or Windows Server 2003 Service Pack 1 (SP1) on a server cluster, you experience all the following symptoms:

Volume mount points that you have configured on shared disks in a server cluster may intermittently become unavailable.
If you move the shared disk resources on the affected cluster node to a different cluster node or if you restart the affected cluster node, some or all the volume mount points may again become available.
If you run the Mountvol command to view the available mount points, you experience one of the following symptoms:
- The GUID of the unavailable mount point does not appear in the results of the Mountvol command.
- The GUID of the unavailable mount point appears in the results of the Mountvol command. However, the following information appears for this GUID:
  *** No Mount Points***
If you use Windows Explorer to click the folder that corresponds to the mount point, you experience one of the following symptoms:
- The folder opens in Windows Explorer.
- You receive the following error message:
  Mount Point Path refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location.
Note If a problem exists with a volume mount point, you expect to receive this error message. You do not expect the folder to open successfully.

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This problem occurs because of a problem in the Mountmgr.sys driver. This problem is an intermittent timing problem that may occur when a volume arrives to be mounted to a mount point.

Note Generally, this problem does not occur in a non-clustered environment. In a non-clustered environment, the timing of the volume mount process is different.

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RESOLUTION

Update information

The following files are available for download from the Microsoft Download Center:

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Download the Windows Server 2003 (KB898790) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=AC2A8F3F-9752-47C7-8D96-AFFE2A44DA79)

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Download the Windows Server 2003 for Itanium-based Systems (KB898790) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=16C004B1-5E92-44B8-864D-E7D11D666734)

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Download the Windows Server 2003 x64 Edition (KB898790) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=83C53B1B-27E2-465A-BAF2-E9C5C5F18A51)

Release Date: December 19, 2006

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 (http://support.microsoft.com/kb/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 prevent any unauthorized changes to the file.

Prerequisites

No prerequisites are required to install this update.

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this update 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 item in Control Panel.

Windows Server 2003, 32-bit versions

   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   12-May-2005  01:34  5.2.3790.2443      46,592  Mountmgr.sys

Windows Server 2003, x64-based versions

   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   12-May-2005  03:50  5.2.3790.2443      72,192  Mountmgr.sys

Windows Server 2003, Itanium-based versions

   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   12-May-2005  03:50  5.2.3790.2443     155,648  Mountmgr.sys

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