Microsoft KB Archive/941692

= On a Windows Server 2003-based computer, the Virtual Disk Service and the Logical Disk Manager Administrative Service may stop responding after you unmount volumes that are created for transportable snapshots =

Article ID: 941692

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems

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SYMPTOMS
Consider the following scenario. You import some transportable snapshots on a Windows Server 2003-based computer. Then, you unmount the volumes that are created for the snapshots. In this scenario, the Virtual Disk Service and the Logical Disk Manager Administrative Service may stop responding.

When this problem occurs, the volumes are not unmounted as expected. You see the drive letters of the volumes in Windows Explorer. However, a red &quot;X&quot; appears on each volume.

Additionally, the following events are logged in the System log:

Event ID 15
Event Type: Error

Event Source: Disk

Event Category: None

Event ID: 15

Date:

Time:

User: N/A

Computer:

Description: The device,, is not ready for access yet.

Event ID 1
Event Type: Error

Event Source: Virtual Disk Service

Event Category: None

Event ID: 1

Date:

Time:

User: N/A

Computer:

Description:

Unexpected failure. Error code:



CAUSE
This problem occurs because a timing issue in the Logical Disk Manager Administrative Service causes a deadlock condition.



Service pack information
To resolve this problem, install the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Hotfix information
A supported hotfix is now 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. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 installed on the computer. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Restart requirement
You do not have to restart the 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 item in Control Panel.

Windows Server 2003, x64-based versions


WORKAROUND
To work around this problem, manually stop the DMAdmin.exe process.



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



MORE INFORMATION
For more information about software update terminology, 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

Additional query words: DMAdmin CommVault Comm Vault hang deadlock snapshot transportable

Keywords: kbbug kbfix kbqfe kbpubtypekc kbexpertiseinter kbhotfixserver kbwinserv2003sp2fix KB941692

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