Microsoft KB Archive/936071

= When you use HSM software to manage files on a network, you cannot open a network-shared file that was created on a Windows XP-based computer when you work offline =

Article ID: 936071

Article Last Modified on 10/31/2007

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APPLIES TO


 * Microsoft Windows XP Professional

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SYMPTOMS
Consider the following scenario:
 * You use Hierarchical Storage Management (HSM) software to manage files that are used infrequently on a file server. In this case, when a user accesses one of the archived files, the storage manager component in HSM brings the archived file online. Additionally, the archived file is transferred to cheaper media by the storage manager according to the policies that you specify.
 * On a Windows XP-based client computer, you create a shared folder on the file server. You make the shared folder available offline.
 * The shared folder contains files that have the reparse point attribute.

Note The reparse point attribute remains on the files when the files are migrated to offline storage.
 * The shared folder has been synchronized with the file server, and the archived files have been downloaded to the offline cache of the client computers on the network.
 * On a Windows XP-based client computer on the network, you try to open a document on the network share by using a Microsoft Office application when you work offline.

In this scenario, you cannot open the document as expected. Additionally, you may receive an error message. For example, in Microsoft Word, you may receive an error message that resembles the following:

An error occurred on opening the file.

In Microsoft Excel, you may receive an error message that resembles the following:

Unable to Access to



CAUSE
When exclusive opportunistic locking is available on a file, the Mrxsmb component caches certain requests, such as read requests, write requests, lock requests, and open requests. This caching behavior makes the requests internal. Therefore, these requests are not sent out over the network.

When the Mrxsmb component receives a lock request, the Mrxsmb component verifies whether a lock conflict exists locally. For example, the Mrxsmb component verifies whether the file is opened by other applications, regardless of the lock buffering state.

In Windows XP, the Mrxsmb component processes read requests only for sparse files. All other requests are sent to the file server. (This includes lock requests.) Therefore, when the client is offline, it cannot open the file.



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 XP 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 install this hotfix, you must have Windows XP Service Pack 2 installed.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.

Registry information
To use this hotfix, you do not have to make any changes to the registry.

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 XP with SP2, x86-based versions


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, 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: CSC HSM reparse point SM FILE_ATTRIBUTE_SPARSE_FILE

Keywords: kbexpertiseadvanced kbfix kbpubtypekc kbqfe kbhotfixserver KB936071

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