Article ID: 818396 - View products that this article applies to.
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On a Microsoft Windows 2000-based computer, when you perform a file operation to a down-level (non-Microsoft Windows NT-based) server that is running a server message block (SMB) service, for example an OS/2 Warp 4 server, the file operation may take approximately 35 seconds or longer to complete.
For example, this problem may occur when you open a file or when you modify file attributes on the down-level server.
Also, overall computer performance may decrease when your Windows 2000-based computer accesses files on the down-level server.
This problem may occur after you do one or both of the following:
This problem occurs when a total file lock (oplock) is sent to the client that issued the request, and the client does not answer. As a result, the server waits for the oplock timeout to occur. On an OS/2 server, the minimum break oplock timeout is 35 seconds.
Part 1: Download and Install the UpdateA supported hotfix is 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.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Date Time Version Size File name -------------------------------------------------- 04-Jun-2003 17:18 5.0.2195.6752 407,792 Mrxsmb.sys 04-Jun-2003 17:18 5.0.2195.6752 168,496 Rdbss.sys
Part 2: Turn Off Opportunistic LockingAfter you install this update on a Windows 2000-based computer, turn off opportunistic locking. To do this, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
296264For more information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/296264/ )Configuring opportunistic locking in Windows
(http://support.microsoft.com/kb/265173/ )The Datacenter Program and Windows 2000 Datacenter Server product
Article ID: 818396 - Last Review: February 27, 2014 - Revision: 5.6