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Stored shadow copies of backup replicas are overwritten even if there is sufficient storage space allocated for shadow copies in Microsoft System Center Data Protection Manager (DPM) 2006. This symptom typically only affects protected volumes with less than 25 gigabytes (GB) of data.
This problem occurs because DPM 2006 incorrectly determines the minimum required disk space threshold that is used to allocate space for shadow copy storage on the DPM 2006 server. The Volume Shadow Copy Service (VSS) uses a minimum disk space threshold for shadow copy area disk allocations. When the threshold for the minimum disk space that is required is incorrect, stored shadow copies can be overwritten.
This update modifies the formulas that DPM 2006 uses to allocate space for shadow copy storage on the DPM 2006 server.
Important You should apply this update to every computer that is running DPM 2006, even if the computer has not experienced the problem.
Note Exit DPM 2006 before you apply this update.
The following file is available for download from the Microsoft Download Center: Download the 910330 package now.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 How to obtain Microsoft support files from online services
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No prerequisites are required.
You do not have to restart the computer after you apply this update.
Update replacement information
This update does not replace any other updates.
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.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the terms that are used in this article, 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