Microsoft KB Archive/829440

= FIX: Persistent Storage Manager (PSM) Hotfix for PSM 2.2 Service Pack 2 =

Article ID: 829440

Article Last Modified on 10/25/2005

-

APPLIES TO


 * Microsoft Server Appliance Kit 2.01
 * Persistent Storage Manager for Server Appliances

-





SYMPTOMS
When your system is running Persistent Storage Manager (PSM) version 2.2, you may receive a stop code error on a blue screen if snapshot deletion occurs at the same time as free space detection occurs.

Additionally, if your system is running PSM and Veritas Netbackup at the same time, you may receive a stop code error on a blue screen during a backup task.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.



CAUSE
When a volume that contains PSM snapshots starts (either because you start the computer, or because you restore a volume to the contents of a snapshot, or because of cluster failover), PSM scans the volume to determine the location of all free space on the volume.

Because of a logic flaw in the PSM driver, any snapshot that is deleted during the scan for free space may cause a stop code error to appear on a blue screen.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Service Pack that contains this hotfix.

To resolve this problem immediately, 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.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
If you are running a version of PSM that is earlier than version 2.2, before you install this hotfix, install PSM Service Pack 2 and any other previously released hotfixes for this product. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

826237 INFO: Persistent Storage Manager Service Pack 2

Additional query words: PSM SAK CDP

Keywords: kbfix kbqfe kbprb kbhotfixserver KB829440

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.